diff --git a/CLAUDE.md b/CLAUDE.md
index 4ef37b8..5db148a 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -16,6 +16,26 @@ Routing, Mails) stehen in `.ai/conventions.md` und werden hier eingebunden — *
 - [Zahlungsmodule](app/EventPaymentModules/CLAUDE.md) — interface-gesteuerte Zahlungsarten (Optionen, Config,
   Anmelde-Zusammenfassung, GiroCode/Fähigkeits-Interfaces, neues Modul hinzufügen).
 
+## Local Group / Parent Group (Stamm / Bund)
+
+Technisch heißt es **Local Group** (Mandant/Tenant) und **Parent Group** (übergeordnete Gruppe); „Stamm"/„Bund" sind nur
+UI-Bezeichnungen.
+
+- **ParentGroup** (`App\Models\ParentGroup`, Tabelle `parent_groups`, app-weit): `tenants.parent_group_id` ist Pflicht
+  (n:1). `is_fallback` markiert „Ohne Zuordnung" — `Tenant::booted()` setzt sie, wenn nichts angegeben ist; sie ist nie
+  löschbar. Andere nur, solange weder Tenant noch Anmeldung sie nutzt (`AdminParentGroupRepository::isInUse()`).
+  Verwaltung LV-only unter `/admin/parent-groups`; Zuordnung am Tenant im Tab „Allgemeines" und bei der Anlage.
+- **Event**: `participant_group_type` (Enum `App\Enumerations\ParticipantGroupType`: `local_group` | `parent_group`),
+  gewählt bei der Anlage, in den Einstellungen änderbar nur ohne Anmeldungen. **Einzige Quelle für die Auswahl**:
+  `Event::participantGroupOptions()` — teilnehmende Stämme oder deren Bünde (distinct). Gespeichert wird
+  `event_participants.local_group` (Slug) **oder** `event_participants.parent_group_id`.
+- **Anzeige**: `EventParticipant::participantGroupName()` → Resource-Feld `participantGroup`; `EventResource` liefert
+  `participantGroupType`, `participantGroupLabel`, `participantGroupOptions` (`{id, name, value}`).
+- **Bezeichnungen** in `global_settings` (Model `GlobalSetting`, Repository `GlobalSettingRepository`, im Container
+  `scoped` — immer über `app(...)` beziehen), Singular + Plural je Ebene, gepflegt von Hauptadmins unter
+  `/admin/settings`. Gelesen über `ParticipantGroupType::label()/pluralLabel()/labels()`. Texte ohne Artikel formulieren
+  („Bitte bei „{label}" eine Auswahl treffen."), weil der Artikel vom Wort abhängt.
+
 ## Umsatzsteuer / Steuerinformationen
 
 Rechtlich korrekter Begriff ist **Umsatzsteuer (USt)**, nicht MwSt. Ziel: tagesbasierte Anmelde-Rechnungen („Teilnahme
diff --git a/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupAction.php b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupAction.php
new file mode 100644
index 0000000..2565485
--- /dev/null
+++ b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupAction.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Domains\Admin\Actions\CreateParentGroup;
+
+use App\Enumerations\ParticipantGroupType;
+use App\Models\ParentGroup;
+
+class CreateParentGroupAction
+{
+    public function __construct(private CreateParentGroupRequest $request)
+    {
+    }
+
+    public function execute(): CreateParentGroupResponse
+    {
+        $response = new CreateParentGroupResponse();
+
+        $name = trim($this->request->name);
+
+        if ($name === '') {
+            $response->message = 'Bitte einen Namen angeben.';
+
+            return $response;
+        }
+
+        $response->parentGroup = ParentGroup::create([
+            'name' => $name,
+            'is_fallback' => false,
+        ]);
+
+        $response->success = true;
+        $response->message = sprintf('%s „%s" wurde angelegt.', ParticipantGroupType::ParentGroup->label(), $name);
+
+        return $response;
+    }
+}
diff --git a/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupRequest.php b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupRequest.php
new file mode 100644
index 0000000..489f4ba
--- /dev/null
+++ b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupRequest.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Domains\Admin\Actions\CreateParentGroup;
+
+class CreateParentGroupRequest
+{
+    public function __construct(
+        public string $name,
+    ) {
+    }
+}
diff --git a/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupResponse.php b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupResponse.php
new file mode 100644
index 0000000..df4fb48
--- /dev/null
+++ b/app/Domains/Admin/Actions/CreateParentGroup/CreateParentGroupResponse.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Domains\Admin\Actions\CreateParentGroup;
+
+use App\Models\ParentGroup;
+
+class CreateParentGroupResponse
+{
+    public bool $success = false;
+    public string $message = '';
+    public ?ParentGroup $parentGroup = null;
+}
diff --git a/app/Domains/Admin/Actions/CreateTenant/CreateTenantAction.php b/app/Domains/Admin/Actions/CreateTenant/CreateTenantAction.php
index 177c357..f236926 100644
--- a/app/Domains/Admin/Actions/CreateTenant/CreateTenantAction.php
+++ b/app/Domains/Admin/Actions/CreateTenant/CreateTenantAction.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Admin\Actions\CreateTenant;
 
+use App\Enumerations\ParticipantGroupType;
 use App\Models\AvailablePaymentMethod;
 use App\Models\PaymentMethod;
 use App\Models\Tenant;
@@ -16,10 +17,17 @@ class CreateTenantAction
     {
         $response = new CreateTenantResponse();
 
+        if ($this->request->parentGroup === null) {
+            $response->message = sprintf('Bitte bei „%s" eine Auswahl treffen.', ParticipantGroupType::ParentGroup->label());
+
+            return $response;
+        }
+
         $tenant = Tenant::create([
             'name' => $this->request->name,
             'slug' => $this->request->slug,
             'url' => $this->request->url,
+            'parent_group_id' => $this->request->parentGroup->id,
             'email' => '',
             'email_finance' => '',
             'account_name' => '',
@@ -46,7 +54,7 @@ class CreateTenantAction
         }
 
         $response->success = true;
-        $response->message = 'Stamm wurde angelegt.';
+        $response->message = sprintf('%s wurde angelegt.', ParticipantGroupType::LocalGroup->label());
         $response->slug = $tenant->slug;
 
         return $response;
diff --git a/app/Domains/Admin/Actions/CreateTenant/CreateTenantRequest.php b/app/Domains/Admin/Actions/CreateTenant/CreateTenantRequest.php
index 85e7e82..440475e 100644
--- a/app/Domains/Admin/Actions/CreateTenant/CreateTenantRequest.php
+++ b/app/Domains/Admin/Actions/CreateTenant/CreateTenantRequest.php
@@ -2,12 +2,16 @@
 
 namespace App\Domains\Admin\Actions\CreateTenant;
 
+use App\Models\ParentGroup;
+
 class CreateTenantRequest
 {
     public function __construct(
         public string $name,
         public string $slug,
         public string $url,
+        /** Pflicht; null heißt, die übermittelte ID war unbekannt. */
+        public ?ParentGroup $parentGroup,
     ) {
     }
 }
diff --git a/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupAction.php b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupAction.php
new file mode 100644
index 0000000..c2b30b0
--- /dev/null
+++ b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupAction.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Domains\Admin\Actions\DeleteParentGroup;
+
+class DeleteParentGroupAction
+{
+    public function __construct(private DeleteParentGroupRequest $request)
+    {
+    }
+
+    public function execute(): DeleteParentGroupResponse
+    {
+        $response = new DeleteParentGroupResponse();
+
+        // Die Fallback-Gruppe nimmt Mandanten ohne Zuordnung auf und muss deshalb bestehen bleiben.
+        if ($this->request->parentGroup->is_fallback) {
+            $response->message = sprintf('„%s" kann nicht gelöscht werden.', $this->request->parentGroup->name);
+
+            return $response;
+        }
+
+        if ($this->request->inUse) {
+            $response->message = sprintf(
+                '„%s" ist noch zugeordnet und kann deshalb nicht gelöscht werden.',
+                $this->request->parentGroup->name,
+            );
+
+            return $response;
+        }
+
+        $this->request->parentGroup->delete();
+
+        $response->success = true;
+        $response->message = sprintf('„%s" wurde gelöscht.', $this->request->parentGroup->name);
+
+        return $response;
+    }
+}
diff --git a/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupRequest.php b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupRequest.php
new file mode 100644
index 0000000..b6368ff
--- /dev/null
+++ b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupRequest.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Domains\Admin\Actions\DeleteParentGroup;
+
+use App\Models\ParentGroup;
+
+class DeleteParentGroupRequest
+{
+    public function __construct(
+        public ParentGroup $parentGroup,
+        /** Ob die Gruppe noch von einem Mandanten oder einer Anmeldung verwendet wird. */
+        public bool $inUse,
+    ) {
+    }
+}
diff --git a/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupResponse.php b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupResponse.php
new file mode 100644
index 0000000..be56bc0
--- /dev/null
+++ b/app/Domains/Admin/Actions/DeleteParentGroup/DeleteParentGroupResponse.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Admin\Actions\DeleteParentGroup;
+
+class DeleteParentGroupResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}
diff --git a/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupAction.php b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupAction.php
new file mode 100644
index 0000000..6748fca
--- /dev/null
+++ b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupAction.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Domains\Admin\Actions\RenameParentGroup;
+
+class RenameParentGroupAction
+{
+    public function __construct(private RenameParentGroupRequest $request)
+    {
+    }
+
+    public function execute(): RenameParentGroupResponse
+    {
+        $response = new RenameParentGroupResponse();
+
+        $name = trim($this->request->name);
+
+        if ($name === '') {
+            $response->message = 'Bitte einen Namen angeben.';
+
+            return $response;
+        }
+
+        // Umbenennen ist jederzeit möglich: Mandanten und Anmeldungen verweisen über die ID.
+        $this->request->parentGroup->update(['name' => $name]);
+
+        $response->success = true;
+        $response->message = 'Der Name wurde gespeichert.';
+
+        return $response;
+    }
+}
diff --git a/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupRequest.php b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupRequest.php
new file mode 100644
index 0000000..1d7418b
--- /dev/null
+++ b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupRequest.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Domains\Admin\Actions\RenameParentGroup;
+
+use App\Models\ParentGroup;
+
+class RenameParentGroupRequest
+{
+    public function __construct(
+        public ParentGroup $parentGroup,
+        public string $name,
+    ) {
+    }
+}
diff --git a/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupResponse.php b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupResponse.php
new file mode 100644
index 0000000..c8a2e3f
--- /dev/null
+++ b/app/Domains/Admin/Actions/RenameParentGroup/RenameParentGroupResponse.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Admin\Actions\RenameParentGroup;
+
+class RenameParentGroupResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}
diff --git a/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsAction.php b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsAction.php
new file mode 100644
index 0000000..092987e
--- /dev/null
+++ b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsAction.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateGlobalSettings;
+
+use App\Models\GlobalSetting;
+
+class UpdateGlobalSettingsAction
+{
+    public function __construct(private UpdateGlobalSettingsRequest $request)
+    {
+    }
+
+    public function execute(): UpdateGlobalSettingsResponse
+    {
+        $response = new UpdateGlobalSettingsResponse();
+
+        $values = [
+            GlobalSetting::LOCAL_GROUP_LABEL => trim($this->request->localGroupLabel),
+            GlobalSetting::LOCAL_GROUP_LABEL_PLURAL => trim($this->request->localGroupLabelPlural),
+            GlobalSetting::PARENT_GROUP_LABEL => trim($this->request->parentGroupLabel),
+            GlobalSetting::PARENT_GROUP_LABEL_PLURAL => trim($this->request->parentGroupLabelPlural),
+        ];
+
+        // Eine leere Bezeichnung ließe Überschriften und Auswahlfelder ohne Beschriftung zurück.
+        if (in_array('', $values, true)) {
+            $response->message = 'Bitte alle Bezeichnungen ausfüllen.';
+
+            return $response;
+        }
+
+        $this->request->globalSettings->setMany($values);
+
+        $response->success = true;
+        $response->message = 'Einstellungen wurden gespeichert.';
+
+        return $response;
+    }
+}
diff --git a/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsRequest.php b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsRequest.php
new file mode 100644
index 0000000..196c479
--- /dev/null
+++ b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsRequest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateGlobalSettings;
+
+use App\Repositories\GlobalSettingRepository;
+
+class UpdateGlobalSettingsRequest
+{
+    public function __construct(
+        public GlobalSettingRepository $globalSettings,
+        public string $localGroupLabel,
+        public string $localGroupLabelPlural,
+        public string $parentGroupLabel,
+        public string $parentGroupLabelPlural,
+    ) {
+    }
+}
diff --git a/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsResponse.php b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsResponse.php
new file mode 100644
index 0000000..2200181
--- /dev/null
+++ b/app/Domains/Admin/Actions/UpdateGlobalSettings/UpdateGlobalSettingsResponse.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateGlobalSettings;
+
+class UpdateGlobalSettingsResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}
diff --git a/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralAction.php b/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralAction.php
index 102402a..914df7b 100644
--- a/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralAction.php
+++ b/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralAction.php
@@ -2,6 +2,8 @@
 
 namespace App\Domains\Admin\Actions\UpdateTenantGeneral;
 
+use App\Enumerations\ParticipantGroupType;
+
 class UpdateTenantGeneralAction
 {
     public function __construct(private UpdateTenantGeneralRequest $request)
@@ -12,10 +14,17 @@ class UpdateTenantGeneralAction
     {
         $response = new UpdateTenantGeneralResponse();
 
+        if ($this->request->parentGroup === null) {
+            $response->message = sprintf('Bitte bei „%s" eine Auswahl treffen.', ParticipantGroupType::ParentGroup->label());
+
+            return $response;
+        }
+
         $this->request->tenant->update([
             'name' => $this->request->name,
             'slug' => $this->request->slug,
             'url' => $this->request->url,
+            'parent_group_id' => $this->request->parentGroup->id,
         ]);
 
         $response->success = true;
diff --git a/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralRequest.php b/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralRequest.php
index 277cf0e..195ac89 100644
--- a/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralRequest.php
+++ b/app/Domains/Admin/Actions/UpdateTenantGeneral/UpdateTenantGeneralRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Admin\Actions\UpdateTenantGeneral;
 
+use App\Models\ParentGroup;
 use App\Models\Tenant;
 
 class UpdateTenantGeneralRequest
@@ -11,6 +12,8 @@ class UpdateTenantGeneralRequest
         public string $name,
         public string $slug,
         public string $url,
+        /** Pflicht; null heißt, die übermittelte ID war unbekannt. */
+        public ?ParentGroup $parentGroup,
     ) {
     }
 }
diff --git a/app/Domains/Admin/Controllers/GlobalSettingsGetController.php b/app/Domains/Admin/Controllers/GlobalSettingsGetController.php
new file mode 100644
index 0000000..e2c3065
--- /dev/null
+++ b/app/Domains/Admin/Controllers/GlobalSettingsGetController.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Enumerations\ParticipantGroupType;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class GlobalSettingsGetController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        return response()->json([
+            'groupLabels' => ParticipantGroupType::labels(),
+        ]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/GlobalSettingsPageController.php b/app/Domains/Admin/Controllers/GlobalSettingsPageController.php
new file mode 100644
index 0000000..0dad486
--- /dev/null
+++ b/app/Domains/Admin/Controllers/GlobalSettingsPageController.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Providers\InertiaProvider;
+use App\Scopes\CommonController;
+use Illuminate\Http\Request;
+use Inertia\Response;
+
+class GlobalSettingsPageController extends CommonController
+{
+    public function __invoke(Request $request): Response
+    {
+        return new InertiaProvider('Admin/GlobalSettings', [])->render();
+    }
+}
diff --git a/app/Domains/Admin/Controllers/GlobalSettingsUpdateController.php b/app/Domains/Admin/Controllers/GlobalSettingsUpdateController.php
new file mode 100644
index 0000000..1721925
--- /dev/null
+++ b/app/Domains/Admin/Controllers/GlobalSettingsUpdateController.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\UpdateGlobalSettings\UpdateGlobalSettingsAction;
+use App\Domains\Admin\Actions\UpdateGlobalSettings\UpdateGlobalSettingsRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class GlobalSettingsUpdateController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        $response = new UpdateGlobalSettingsAction(new UpdateGlobalSettingsRequest(
+            globalSettings: $this->globalSettings,
+            localGroupLabel: (string) $request->input('localGroup'),
+            localGroupLabelPlural: (string) $request->input('localGroupPlural'),
+            parentGroupLabel: (string) $request->input('parentGroup'),
+            parentGroupLabelPlural: (string) $request->input('parentGroupPlural'),
+        ))->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/ParentGroupCreateController.php b/app/Domains/Admin/Controllers/ParentGroupCreateController.php
new file mode 100644
index 0000000..c9087e8
--- /dev/null
+++ b/app/Domains/Admin/Controllers/ParentGroupCreateController.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\CreateParentGroup\CreateParentGroupAction;
+use App\Domains\Admin\Actions\CreateParentGroup\CreateParentGroupRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ParentGroupCreateController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        $response = new CreateParentGroupAction(new CreateParentGroupRequest(
+            name: (string) $request->input('name'),
+        ))->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/ParentGroupDeleteController.php b/app/Domains/Admin/Controllers/ParentGroupDeleteController.php
new file mode 100644
index 0000000..ca73fdf
--- /dev/null
+++ b/app/Domains/Admin/Controllers/ParentGroupDeleteController.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\DeleteParentGroup\DeleteParentGroupAction;
+use App\Domains\Admin\Actions\DeleteParentGroup\DeleteParentGroupRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ParentGroupDeleteController extends CommonController
+{
+    public function __invoke(int $id, Request $request): JsonResponse
+    {
+        $parentGroup = $this->adminParentGroups->findById($id);
+
+        if ($parentGroup === null) {
+            return response()->json(['status' => 'error', 'message' => 'Eintrag nicht gefunden.'], 404);
+        }
+
+        $response = new DeleteParentGroupAction(new DeleteParentGroupRequest(
+            parentGroup: $parentGroup,
+            inUse: $this->adminParentGroups->isInUse($parentGroup),
+        ))->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/ParentGroupListApiController.php b/app/Domains/Admin/Controllers/ParentGroupListApiController.php
new file mode 100644
index 0000000..07aaf4e
--- /dev/null
+++ b/app/Domains/Admin/Controllers/ParentGroupListApiController.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ParentGroupListApiController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        $parentGroups = $this->adminParentGroups->all()->map(fn ($parentGroup) => [
+            'id' => $parentGroup->id,
+            'name' => $parentGroup->name,
+            'isFallback' => $parentGroup->is_fallback,
+            'tenantCount' => $parentGroup->tenants_count,
+            'deletable' => !$parentGroup->is_fallback && !$this->adminParentGroups->isInUse($parentGroup),
+        ]);
+
+        return response()->json(['parentGroups' => $parentGroups]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/ParentGroupListPageController.php b/app/Domains/Admin/Controllers/ParentGroupListPageController.php
new file mode 100644
index 0000000..8f9cc42
--- /dev/null
+++ b/app/Domains/Admin/Controllers/ParentGroupListPageController.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Enumerations\ParticipantGroupType;
+use App\Providers\InertiaProvider;
+use App\Scopes\CommonController;
+use Illuminate\Http\Request;
+use Inertia\Response;
+
+class ParentGroupListPageController extends CommonController
+{
+    public function __invoke(Request $request): Response
+    {
+        return new InertiaProvider('Admin/ParentGroupList', [
+            'groupLabels' => ParticipantGroupType::labels(),
+        ])->render();
+    }
+}
diff --git a/app/Domains/Admin/Controllers/ParentGroupUpdateController.php b/app/Domains/Admin/Controllers/ParentGroupUpdateController.php
new file mode 100644
index 0000000..8eb00f7
--- /dev/null
+++ b/app/Domains/Admin/Controllers/ParentGroupUpdateController.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\RenameParentGroup\RenameParentGroupAction;
+use App\Domains\Admin\Actions\RenameParentGroup\RenameParentGroupRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ParentGroupUpdateController extends CommonController
+{
+    public function __invoke(int $id, Request $request): JsonResponse
+    {
+        $parentGroup = $this->adminParentGroups->findById($id);
+
+        if ($parentGroup === null) {
+            return response()->json(['status' => 'error', 'message' => 'Eintrag nicht gefunden.'], 404);
+        }
+
+        $response = new RenameParentGroupAction(new RenameParentGroupRequest(
+            parentGroup: $parentGroup,
+            name: (string) $request->input('name'),
+        ))->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}
diff --git a/app/Domains/Admin/Controllers/TenantCreateController.php b/app/Domains/Admin/Controllers/TenantCreateController.php
index 1048f63..4661219 100644
--- a/app/Domains/Admin/Controllers/TenantCreateController.php
+++ b/app/Domains/Admin/Controllers/TenantCreateController.php
@@ -16,6 +16,7 @@ class TenantCreateController extends CommonController
             name: $request->input('name'),
             slug: $request->input('slug'),
             url: $request->input('url'),
+            parentGroup: $this->adminParentGroups->findById((int) $request->input('parent_group_id')),
         ));
 
         $response = $action->execute();
diff --git a/app/Domains/Admin/Controllers/TenantGeneralGetController.php b/app/Domains/Admin/Controllers/TenantGeneralGetController.php
index 714bb72..201ff90 100644
--- a/app/Domains/Admin/Controllers/TenantGeneralGetController.php
+++ b/app/Domains/Admin/Controllers/TenantGeneralGetController.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Admin\Controllers;
 
+use App\Enumerations\ParticipantGroupType;
 use App\Scopes\CommonController;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
@@ -17,6 +18,12 @@ class TenantGeneralGetController extends CommonController
             'slug' => $tenant->slug,
             'url' => $tenant->url,
             'is_active_local_group' => $tenant->is_active_local_group,
+            'parent_group_id' => $tenant->parent_group_id,
+            'parentGroups' => $this->adminParentGroups->all()->map(fn ($parentGroup) => [
+                'id' => $parentGroup->id,
+                'name' => $parentGroup->name,
+            ]),
+            'parentGroupLabel' => ParticipantGroupType::ParentGroup->label(),
             'saveEndpoint' => '/api/v1/admin/tenants/' . $slug . '/general',
         ]);
     }
diff --git a/app/Domains/Admin/Controllers/TenantGeneralUpdateController.php b/app/Domains/Admin/Controllers/TenantGeneralUpdateController.php
index a1654fe..6de3a30 100644
--- a/app/Domains/Admin/Controllers/TenantGeneralUpdateController.php
+++ b/app/Domains/Admin/Controllers/TenantGeneralUpdateController.php
@@ -19,6 +19,7 @@ class TenantGeneralUpdateController extends CommonController
             name: $request->input('name'),
             slug: $request->input('slug'),
             url: $request->input('url'),
+            parentGroup: $this->adminParentGroups->findById((int) $request->input('parent_group_id')),
         ));
 
         $response = $action->execute();
diff --git a/app/Domains/Admin/Controllers/TenantListApiController.php b/app/Domains/Admin/Controllers/TenantListApiController.php
index f09e6b4..0e64692 100644
--- a/app/Domains/Admin/Controllers/TenantListApiController.php
+++ b/app/Domains/Admin/Controllers/TenantListApiController.php
@@ -18,9 +18,17 @@ class TenantListApiController extends CommonController
                 'slug' => $tenant->slug,
                 'url' => $tenant->url,
                 'is_active_local_group' => $tenant->is_active_local_group,
+                'parentGroup' => $tenant->parentGroup?->name,
             ];
         });
 
-        return response()->json(['tenants' => $mapped]);
+        // Auswahl für das Anlage-Formular (Pflichtangabe).
+        $parentGroups = $this->adminParentGroups->all()->map(fn ($parentGroup) => [
+            'id' => $parentGroup->id,
+            'name' => $parentGroup->name,
+            'isFallback' => $parentGroup->is_fallback,
+        ]);
+
+        return response()->json(['tenants' => $mapped, 'parentGroups' => $parentGroups]);
     }
 }
diff --git a/app/Domains/Admin/Controllers/TenantListPageController.php b/app/Domains/Admin/Controllers/TenantListPageController.php
index 2cfbeb7..4a1581a 100644
--- a/app/Domains/Admin/Controllers/TenantListPageController.php
+++ b/app/Domains/Admin/Controllers/TenantListPageController.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Admin\Controllers;
 
+use App\Enumerations\ParticipantGroupType;
 use App\Providers\InertiaProvider;
 use App\Scopes\CommonController;
 use Illuminate\Http\Request;
@@ -11,7 +12,9 @@ class TenantListPageController extends CommonController
 {
     public function __invoke(Request $request): Response
     {
-        $inertiaProvider = new InertiaProvider('Admin/TenantList', []);
+        $inertiaProvider = new InertiaProvider('Admin/TenantList', [
+            'groupLabels' => ParticipantGroupType::labels(),
+        ]);
         return $inertiaProvider->render();
     }
 }
diff --git a/app/Domains/Admin/Repositories/AdminParentGroupRepository.php b/app/Domains/Admin/Repositories/AdminParentGroupRepository.php
new file mode 100644
index 0000000..548cb09
--- /dev/null
+++ b/app/Domains/Admin/Repositories/AdminParentGroupRepository.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Domains\Admin\Repositories;
+
+use App\Models\ParentGroup;
+use Illuminate\Database\Eloquent\Collection;
+
+class AdminParentGroupRepository
+{
+    /** Alle Parent Groups, alphabetisch mit „Ohne Zuordnung" am Ende, mit der Zahl zugeordneter Mandanten. */
+    public function all(): Collection
+    {
+        return ParentGroup::withCount('tenants')
+            ->ordered()
+            ->get();
+    }
+
+    public function findById(int $id): ?ParentGroup
+    {
+        return ParentGroup::find($id);
+    }
+
+    /**
+     * Ob die Parent Group noch verwendet wird -- von einem Mandanten oder von einer Anmeldung. Anmeldungen sind
+     * mandantengebunden; gezählt wird hier bewusst über alle Mandanten hinweg.
+     */
+    public function isInUse(ParentGroup $parentGroup): bool
+    {
+        return $parentGroup->tenants()->exists()
+            || $parentGroup->eventParticipants()->withoutGlobalScopes()->exists();
+    }
+}
diff --git a/app/Domains/Admin/Routes/api.php b/app/Domains/Admin/Routes/api.php
index f3f94b2..391efae 100644
--- a/app/Domains/Admin/Routes/api.php
+++ b/app/Domains/Admin/Routes/api.php
@@ -5,6 +5,8 @@ use App\Domains\Admin\Controllers\DocumentAssetUpdateController;
 use App\Domains\Admin\Controllers\DocumentTemplatesGetController;
 use App\Domains\Admin\Controllers\DocumentTemplatesPreviewController;
 use App\Domains\Admin\Controllers\DocumentTemplatesUpdateController;
+use App\Domains\Admin\Controllers\GlobalSettingsGetController;
+use App\Domains\Admin\Controllers\GlobalSettingsUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantContactGetController;
 use App\Domains\Admin\Controllers\ManagedTenantContactUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantGdprGetController;
@@ -15,6 +17,10 @@ use App\Domains\Admin\Controllers\ManagedTenantPaymentGetController;
 use App\Domains\Admin\Controllers\ManagedTenantPaymentUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantTaxGetController;
 use App\Domains\Admin\Controllers\ManagedTenantTaxUpdateController;
+use App\Domains\Admin\Controllers\ParentGroupCreateController;
+use App\Domains\Admin\Controllers\ParentGroupDeleteController;
+use App\Domains\Admin\Controllers\ParentGroupListApiController;
+use App\Domains\Admin\Controllers\ParentGroupUpdateController;
 use App\Domains\Admin\Controllers\TenantContactGetController;
 use App\Domains\Admin\Controllers\TenantContactUpdateController;
 use App\Domains\Admin\Controllers\TenantCreateController;
@@ -76,6 +82,12 @@ Route::middleware([IdentifyTenant::class, 'auth', AdminRoleMiddleware::class])->
             Route::post('/assets', DocumentAssetUpdateController::class);
             Route::delete('/assets/{name}', DocumentAssetDeleteController::class);
         });
+
+        // Bezeichnungen der Gruppen-Ebenen gelten ebenfalls app-weit.
+        Route::prefix('api/v1/admin/settings')->group(function () {
+            Route::get('/', GlobalSettingsGetController::class);
+            Route::post('/', GlobalSettingsUpdateController::class);
+        });
     });
 
     Route::middleware(LvOnlyMiddleware::class)->group(function () {
@@ -97,5 +109,12 @@ Route::middleware([IdentifyTenant::class, 'auth', AdminRoleMiddleware::class])->
                 Route::post('/tax', ManagedTenantTaxUpdateController::class);
             });
         });
+
+        Route::prefix('api/v1/admin/parent-groups')->group(function () {
+            Route::get('/list', ParentGroupListApiController::class);
+            Route::post('/create', ParentGroupCreateController::class);
+            Route::post('/{id}', ParentGroupUpdateController::class)->whereNumber('id');
+            Route::delete('/{id}', ParentGroupDeleteController::class)->whereNumber('id');
+        });
     });
 });
diff --git a/app/Domains/Admin/Routes/web.php b/app/Domains/Admin/Routes/web.php
index 73ca343..952da52 100644
--- a/app/Domains/Admin/Routes/web.php
+++ b/app/Domains/Admin/Routes/web.php
@@ -2,6 +2,8 @@
 
 use App\Domains\Admin\Controllers\AdminDashboardController;
 use App\Domains\Admin\Controllers\DocumentTemplatesPageController;
+use App\Domains\Admin\Controllers\GlobalSettingsPageController;
+use App\Domains\Admin\Controllers\ParentGroupListPageController;
 use App\Domains\Admin\Controllers\TenantEditPageController;
 use App\Domains\Admin\Controllers\TenantListPageController;
 use App\Domains\Admin\Controllers\TenantPageController;
@@ -21,11 +23,13 @@ Route::middleware([IdentifyTenant::class, 'auth', AdminRoleMiddleware::class])->
         // App-weit gültige Dokumentvorlagen -- nur für Hauptadministrator*innen.
         Route::middleware(MainAdminRoleMiddleware::class)->group(function () {
             Route::get('/document-templates', DocumentTemplatesPageController::class);
+            Route::get('/settings', GlobalSettingsPageController::class);
         });
 
         Route::middleware(LvOnlyMiddleware::class)->group(function () {
             Route::get('/tenants', TenantListPageController::class);
             Route::get('/tenants/{slug}', TenantEditPageController::class);
+            Route::get('/parent-groups', ParentGroupListPageController::class);
         });
     });
 });
diff --git a/app/Domains/Admin/Views/GlobalSettings.vue b/app/Domains/Admin/Views/GlobalSettings.vue
new file mode 100644
index 0000000..e753948
--- /dev/null
+++ b/app/Domains/Admin/Views/GlobalSettings.vue
@@ -0,0 +1,116 @@
+<script setup>
+import { ref, onMounted } from 'vue';
+import AdminAppLayout from "../../../../resources/js/layouts/AdminAppLayout.vue";
+import ShadowedBox from "../../../Views/Components/ShadowedBox.vue";
+import { useAjax } from "../../../../resources/js/components/ajaxHandler.js";
+import { toast } from "vue3-toastify";
+
+const { request } = useAjax()
+
+const form = ref({
+    localGroup: '',
+    localGroupPlural: '',
+    parentGroup: '',
+    parentGroupPlural: '',
+})
+
+onMounted(async () => {
+    const response = await request('/api/v1/admin/settings')
+    Object.assign(form.value, response?.groupLabels ?? {})
+})
+
+async function save() {
+    const response = await request('/api/v1/admin/settings', {
+        method: 'POST',
+        body: form.value,
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Speichern')
+    }
+}
+</script>
+
+<template>
+    <AdminAppLayout title="Einstellungen">
+        <shadowed-box style="width: 95%; margin: 20px auto; padding: 20px; overflow-x: hidden;">
+            <h3>Bezeichnungen der Gruppen</h3>
+            <p class="hint">
+                Gelten für alle Mandanten: in Anmeldungen, Teilnehmendenlisten, Exporten und in der Verwaltung.
+            </p>
+            <table class="data-table">
+                <thead>
+                    <tr>
+                        <th></th>
+                        <th>Einzahl</th>
+                        <th>Mehrzahl</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <tr>
+                        <th>Gruppe (Mandant)</th>
+                        <td><input type="text" v-model="form.localGroup" class="form-input" placeholder="z. B. Stamm" /></td>
+                        <td><input type="text" v-model="form.localGroupPlural" class="form-input" placeholder="z. B. Stämme" /></td>
+                    </tr>
+                    <tr>
+                        <th>Übergeordnete Gruppe</th>
+                        <td><input type="text" v-model="form.parentGroup" class="form-input" placeholder="z. B. Bund" /></td>
+                        <td><input type="text" v-model="form.parentGroupPlural" class="form-input" placeholder="z. B. Bünde" /></td>
+                    </tr>
+                </tbody>
+            </table>
+            <button class="btn-save" @click="save">Speichern</button>
+        </shadowed-box>
+    </AdminAppLayout>
+</template>
+
+<style scoped>
+.hint {
+    color: #6b7280;
+    font-size: 0.9rem;
+}
+
+.data-table {
+    width: 100%;
+    border-collapse: collapse;
+}
+
+.data-table th {
+    text-align: left;
+    padding: 8px 12px;
+    color: #374151;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.data-table td {
+    padding: 8px 12px;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.form-input {
+    width: 100%;
+    padding: 6px 10px;
+    border: 1px solid #d1d5db;
+    border-radius: 6px;
+    font-size: 0.95rem;
+    box-sizing: border-box;
+}
+
+.btn-save {
+    margin-top: 15px;
+    padding: 8px 20px;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-weight: bold;
+    font-size: 0.9rem;
+    background-color: #16a34a;
+    color: #ffffff;
+}
+
+.btn-save:hover {
+    background-color: #15803d;
+}
+</style>
diff --git a/app/Domains/Admin/Views/ParentGroupList.vue b/app/Domains/Admin/Views/ParentGroupList.vue
new file mode 100644
index 0000000..7bfea4c
--- /dev/null
+++ b/app/Domains/Admin/Views/ParentGroupList.vue
@@ -0,0 +1,249 @@
+<script setup>
+import { ref, onMounted } from 'vue';
+import AdminAppLayout from "../../../../resources/js/layouts/AdminAppLayout.vue";
+import ShadowedBox from "../../../Views/Components/ShadowedBox.vue";
+import { useAjax } from "../../../../resources/js/components/ajaxHandler.js";
+import { toast } from "vue3-toastify";
+
+const props = defineProps({
+    groupLabels: {
+        type: Object,
+        default: () => ({ localGroupPlural: 'Stämme', parentGroup: 'Bund', parentGroupPlural: 'Bünde' }),
+    },
+})
+
+const { request } = useAjax()
+
+const parentGroups = ref([])
+const newName = ref('')
+const showCreate = ref(false)
+// ID des Eintrags, der gerade umbenannt wird, samt Entwurf des neuen Namens.
+const editingId = ref(null)
+const editName = ref('')
+
+onMounted(async () => {
+    await loadParentGroups()
+})
+
+async function loadParentGroups() {
+    const response = await request('/api/v1/admin/parent-groups/list')
+    parentGroups.value = response?.parentGroups ?? []
+}
+
+async function createParentGroup() {
+    const response = await request('/api/v1/admin/parent-groups/create', {
+        method: 'POST',
+        body: { name: newName.value },
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+        newName.value = ''
+        showCreate.value = false
+        await loadParentGroups()
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Anlegen')
+    }
+}
+
+function startEditing(parentGroup) {
+    editingId.value = parentGroup.id
+    editName.value = parentGroup.name
+}
+
+async function saveName(parentGroup) {
+    const response = await request('/api/v1/admin/parent-groups/' + parentGroup.id, {
+        method: 'POST',
+        body: { name: editName.value },
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+        editingId.value = null
+        await loadParentGroups()
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Speichern')
+    }
+}
+
+async function deleteParentGroup(parentGroup) {
+    if (!confirm('„' + parentGroup.name + '" wirklich löschen?')) {
+        return
+    }
+
+    const response = await request('/api/v1/admin/parent-groups/' + parentGroup.id, {
+        method: 'DELETE',
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+        await loadParentGroups()
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Löschen')
+    }
+}
+</script>
+
+<template>
+    <AdminAppLayout :title="props.groupLabels.parentGroupPlural">
+        <shadowed-box style="width: 95%; margin: 20px auto; padding: 20px; overflow-x: hidden;">
+            <table class="parent-group-table">
+                <thead>
+                    <tr>
+                        <th>Name</th>
+                        <th>Zugeordnete {{ props.groupLabels.localGroupPlural }}</th>
+                        <th></th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <tr v-for="parentGroup in parentGroups" :key="parentGroup.id">
+                        <td>
+                            <input v-if="editingId === parentGroup.id" type="text" v-model="editName" class="form-input"
+                                   @keyup.enter="saveName(parentGroup)" />
+                            <span v-else>{{ parentGroup.name }}</span>
+                        </td>
+                        <td>{{ parentGroup.tenantCount }}</td>
+                        <td class="actions">
+                            <template v-if="editingId === parentGroup.id">
+                                <button class="btn-save" @click="saveName(parentGroup)">Speichern</button>
+                                <button class="btn-cancel" @click="editingId = null">Abbrechen</button>
+                            </template>
+                            <template v-else>
+                                <button class="btn-edit" @click="startEditing(parentGroup)">Umbenennen</button>
+                                <button v-if="parentGroup.deletable" class="btn-delete" @click="deleteParentGroup(parentGroup)">Löschen</button>
+                            </template>
+                        </td>
+                    </tr>
+                </tbody>
+            </table>
+
+            <p class="hint">
+                Löschen ist nur möglich, solange keine {{ props.groupLabels.localGroupPlural }} und keine Anmeldungen
+                zugeordnet sind. „Ohne Zuordnung" bleibt immer bestehen.
+            </p>
+
+            <div style="margin-top: 20px;">
+                <button v-if="!showCreate" class="btn-create" @click="showCreate = true">Neuen Eintrag anlegen</button>
+
+                <div v-if="showCreate" class="create-form">
+                    <h3>Neuen Eintrag anlegen ({{ props.groupLabels.parentGroup }})</h3>
+                    <input type="text" v-model="newName" class="form-input" placeholder="Name"
+                           @keyup.enter="createParentGroup" />
+                    <div class="btn-group">
+                        <button class="btn-save" @click="createParentGroup">Anlegen</button>
+                        <button class="btn-cancel" @click="showCreate = false">Abbrechen</button>
+                    </div>
+                </div>
+            </div>
+        </shadowed-box>
+    </AdminAppLayout>
+</template>
+
+<style scoped>
+.parent-group-table {
+    width: 100%;
+    border-collapse: collapse;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    overflow: hidden;
+}
+
+.parent-group-table thead th {
+    text-align: left;
+    padding: 10px 16px;
+    background-color: #f9fafb;
+    color: #374151;
+    font-weight: bold;
+    border-bottom: 2px solid #d1d5db;
+}
+
+.parent-group-table tbody td {
+    padding: 10px 16px;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.actions {
+    display: flex;
+    gap: 8px;
+    justify-content: flex-end;
+}
+
+.hint {
+    margin-top: 12px;
+    color: #6b7280;
+    font-size: 0.9rem;
+}
+
+.create-form {
+    margin-top: 15px;
+    padding: 20px;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    background-color: #f9fafb;
+}
+
+.create-form h3 {
+    margin: 0 0 15px 0;
+    color: #374151;
+}
+
+.form-input {
+    width: 100%;
+    padding: 6px 10px;
+    border: 1px solid #d1d5db;
+    border-radius: 6px;
+    font-size: 0.95rem;
+    box-sizing: border-box;
+}
+
+.btn-group {
+    display: flex;
+    gap: 10px;
+    margin-top: 15px;
+}
+
+.btn-create, .btn-save, .btn-cancel, .btn-edit, .btn-delete {
+    padding: 6px 16px;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-weight: bold;
+    font-size: 0.9rem;
+}
+
+.btn-create, .btn-edit {
+    background-color: #1d4899;
+    color: #ffffff;
+}
+
+.btn-create:hover, .btn-edit:hover {
+    background-color: #163a7a;
+}
+
+.btn-save {
+    background-color: #16a34a;
+    color: #ffffff;
+}
+
+.btn-save:hover {
+    background-color: #15803d;
+}
+
+.btn-cancel {
+    background-color: #e5e7eb;
+    color: #374151;
+}
+
+.btn-cancel:hover {
+    background-color: #d1d5db;
+}
+
+.btn-delete {
+    background-color: #dc2626;
+    color: #ffffff;
+}
+
+.btn-delete:hover {
+    background-color: #b91c1c;
+}
+</style>
diff --git a/app/Domains/Admin/Views/Partials/TenantGeneral.vue b/app/Domains/Admin/Views/Partials/TenantGeneral.vue
index bce3d10..51e6271 100644
--- a/app/Domains/Admin/Views/Partials/TenantGeneral.vue
+++ b/app/Domains/Admin/Views/Partials/TenantGeneral.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { ref } from 'vue';
+import { computed, ref } from 'vue';
 import { useAjax } from "../../../../../resources/js/components/ajaxHandler.js";
 import { toast } from "vue3-toastify";
 
@@ -17,8 +17,16 @@ const form = ref({
     name: props.data.name ?? '',
     slug: props.data.slug ?? '',
     url: props.data.url ?? '',
+    parent_group_id: props.data.parent_group_id ?? null,
 })
 
+// Übergeordnete Gruppe (z. B. „Bund") -- Pflichtangabe, Auswahl aus der LV-seitig gepflegten Liste.
+const parentGroups = props.data.parentGroups ?? []
+const parentGroupLabel = props.data.parentGroupLabel ?? 'Bund'
+const parentGroupName = computed(() =>
+    parentGroups.find(g => g.id === form.value.parent_group_id)?.name ?? '—'
+)
+
 async function save() {
     const saveUrl = props.data.saveEndpoint ?? '/api/v1/admin/tenants/' + props.data.slug + '/general'
     const response = await request(saveUrl, {
@@ -39,6 +47,7 @@ async function save() {
     <div v-if="!editing">
         <table class="data-table">
             <tr><th>Name:</th><td>{{ form.name }}</td></tr>
+            <tr><th>{{ parentGroupLabel }}:</th><td>{{ parentGroupName }}</td></tr>
             <tr><th>Slug:</th><td>{{ form.slug }}</td></tr>
             <tr><th>URL:</th><td>{{ form.url }}</td></tr>
             <tr><th>Status:</th><td>
@@ -54,6 +63,14 @@ async function save() {
                 <th>Name:</th>
                 <td><input type="text" v-model="form.name" class="form-input" /></td>
             </tr>
+            <tr>
+                <th>{{ parentGroupLabel }}:</th>
+                <td>
+                    <select v-model="form.parent_group_id" class="form-input">
+                        <option v-for="group in parentGroups" :key="group.id" :value="group.id">{{ group.name }}</option>
+                    </select>
+                </td>
+            </tr>
             <tr>
                 <th>Slug:</th>
                 <td><input type="text" v-model="form.slug" class="form-input" /></td>
diff --git a/app/Domains/Admin/Views/TenantList.vue b/app/Domains/Admin/Views/TenantList.vue
index 9773fc9..f1958d4 100644
--- a/app/Domains/Admin/Views/TenantList.vue
+++ b/app/Domains/Admin/Views/TenantList.vue
@@ -5,6 +5,13 @@ import ShadowedBox from "../../../Views/Components/ShadowedBox.vue";
 import { useAjax } from "../../../../resources/js/components/ajaxHandler.js";
 import { toast } from "vue3-toastify";
 
+const props = defineProps({
+    groupLabels: {
+        type: Object,
+        default: () => ({ localGroup: 'Stamm', localGroupPlural: 'Stämme', parentGroup: 'Bund' }),
+    },
+})
+
 const { request } = useAjax()
 
 function openTenant(slug) {
@@ -12,12 +19,16 @@ function openTenant(slug) {
 }
 
 const tenants = ref([])
+const parentGroups = ref([])
 const showCreate = ref(false)
-const createForm = ref({
+const emptyForm = () => ({
     name: '',
     slug: '',
     url: '',
+    // Pflichtangabe; vorbelegt mit „Ohne Zuordnung", sobald die Liste geladen ist.
+    parent_group_id: parentGroups.value.find(g => g.isFallback)?.id ?? null,
 })
+const createForm = ref(emptyForm())
 
 onMounted(async () => {
     await loadTenants()
@@ -33,6 +44,11 @@ async function loadTenants() {
     })
     const data = await response.json()
     tenants.value = data.tenants
+    parentGroups.value = data.parentGroups ?? []
+
+    if (createForm.value.parent_group_id === null) {
+        createForm.value.parent_group_id = parentGroups.value.find(g => g.isFallback)?.id ?? null
+    }
 }
 
 async function createTenant() {
@@ -44,7 +60,7 @@ async function createTenant() {
     if (response && response.status === 'success') {
         toast.success(response.message)
         showCreate.value = false
-        createForm.value = { name: '', slug: '', url: '' }
+        createForm.value = emptyForm()
         await loadTenants()
     } else {
         toast.error(response?.message ?? 'Fehler beim Anlegen')
@@ -53,12 +69,13 @@ async function createTenant() {
 </script>
 
 <template>
-    <AdminAppLayout title="Stämme">
+    <AdminAppLayout :title="props.groupLabels.localGroupPlural">
         <shadowed-box style="width: 95%; margin: 20px auto; padding: 20px; overflow-x: hidden;">
             <table class="tenant-table">
                 <thead>
                     <tr>
                         <th>Name</th>
+                        <th>{{ props.groupLabels.parentGroup }}</th>
                         <th>Slug</th>
                         <th>URL</th>
                         <th>Status</th>
@@ -67,6 +84,7 @@ async function createTenant() {
                 <tbody>
                     <tr v-for="tenant in tenants" :key="tenant.slug" class="tenant-row" @click="openTenant(tenant.slug)">
                         <td>{{ tenant.name }}</td>
+                        <td>{{ tenant.parentGroup ?? '—' }}</td>
                         <td>{{ tenant.slug }}</td>
                         <td>{{ tenant.url }}</td>
                         <td>
@@ -79,15 +97,23 @@ async function createTenant() {
             </table>
 
             <div style="margin-top: 20px;">
-                <button v-if="!showCreate" class="btn-create" @click="showCreate = true">Neuen Stamm anlegen</button>
+                <button v-if="!showCreate" class="btn-create" @click="showCreate = true">Neuen Eintrag anlegen ({{ props.groupLabels.localGroup }})</button>
 
                 <div v-if="showCreate" class="create-form">
-                    <h3>Neuen Stamm anlegen</h3>
+                    <h3>Neuen Eintrag anlegen ({{ props.groupLabels.localGroup }})</h3>
                     <table class="form-table">
                         <tr>
                             <th>Name</th>
                             <td><input type="text" v-model="createForm.name" class="form-input" /></td>
                         </tr>
+                        <tr>
+                            <th>{{ props.groupLabels.parentGroup }}</th>
+                            <td>
+                                <select v-model="createForm.parent_group_id" class="form-input">
+                                    <option v-for="group in parentGroups" :key="group.id" :value="group.id">{{ group.name }}</option>
+                                </select>
+                            </td>
+                        </tr>
                         <tr>
                             <th>Slug</th>
                             <td><input type="text" v-model="createForm.slug" class="form-input" /></td>
diff --git a/app/Domains/Event/Actions/CreateEvent/CreateEventCommand.php b/app/Domains/Event/Actions/CreateEvent/CreateEventCommand.php
index 8b3fd18..bf78d39 100644
--- a/app/Domains/Event/Actions/CreateEvent/CreateEventCommand.php
+++ b/app/Domains/Event/Actions/CreateEvent/CreateEventCommand.php
@@ -62,6 +62,7 @@ class CreateEventCommand {
             'vat_pricing_mode' => $tenant->vat_pricing_mode,
             'tax_exemption_reason' => $tenant->tax_exemption_reason,
             'tax_exemption_note' => $tenant->tax_exemption_note,
+            'participant_group_type' => $this->request->participantGroupType->value,
             // Den Event-Teil der Rechnungsnummer einfrieren: Tenant-Präfix und Startdatum sind später
             // änderbar, eine herausgegebene Rechnung würde sonst zu einer anderen Nummer gehören.
             //
diff --git a/app/Domains/Event/Actions/CreateEvent/CreateEventRequest.php b/app/Domains/Event/Actions/CreateEvent/CreateEventRequest.php
index 8ff42f8..9dbb808 100644
--- a/app/Domains/Event/Actions/CreateEvent/CreateEventRequest.php
+++ b/app/Domains/Event/Actions/CreateEvent/CreateEventRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Event\Actions\CreateEvent;
 
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\ParticipationFeeType;
 use DateTime;
 
@@ -21,8 +22,11 @@ class CreateEventRequest {
     public bool $payPerDay;
     public ?string $street;
     public ?string $houseNumber;
+    /** Wonach bei der Anmeldung gefragt wird: Local Group oder Parent Group. */
+    public ParticipantGroupType $participantGroupType;
 
-    public function __construct(string $name, string $location, string $postalCode, string $email, DateTime $begin, DateTime $end, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $earlyBirdEndAmountIncrease, ParticipationFeeType $participationFeeType, string $accountOwner, string $accountIban, bool $payPerDay, ?string $street = null, ?string $houseNumber = null) {
+    public function __construct(string $name, string $location, string $postalCode, string $email, DateTime $begin, DateTime $end, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $earlyBirdEndAmountIncrease, ParticipationFeeType $participationFeeType, string $accountOwner, string $accountIban, bool $payPerDay, ?string $street = null, ?string $houseNumber = null, ParticipantGroupType $participantGroupType = ParticipantGroupType::LocalGroup) {
+        $this->participantGroupType = $participantGroupType;
         $this->name = $name;
         $this->location = $location;
         $this->postalCode = $postalCode;
diff --git a/app/Domains/Event/Actions/ShortSignUp/ShortSignUpCommand.php b/app/Domains/Event/Actions/ShortSignUp/ShortSignUpCommand.php
index d8b651f..15fd710 100644
--- a/app/Domains/Event/Actions/ShortSignUp/ShortSignUpCommand.php
+++ b/app/Domains/Event/Actions/ShortSignUp/ShortSignUpCommand.php
@@ -4,6 +4,8 @@ namespace App\Domains\Event\Actions\ShortSignUp;
 
 use App\Domains\Event\Actions\SignUp\SignUpCommand;
 use App\Domains\Event\Actions\SignUp\SignUpRequest;
+use App\Models\ParentGroup;
+use App\Models\Tenant;
 use App\ValueObjects\Age;
 
 /**
@@ -53,18 +55,21 @@ class ShortSignUpCommand {
             return $response;
         }
 
-        // Stamm: bei genau einem teilnehmenden Stamm wird dieser gesetzt, bei mehreren muss gewählt werden,
-        // ohne teilnehmende Stämme bleibt die Zuordnung leer.
-        $localGroups = $this->request->event->localGroups;
-        $localGroup = null;
+        // Gruppe (Local oder Parent Group, je nach Veranstaltung): bei genau einer Option wird diese gesetzt, bei
+        // mehreren muss gewählt werden, ohne Optionen bleibt die Zuordnung leer.
+        $groupOptions = $this->request->event->participantGroupOptions();
+        $participantGroup = null;
 
-        if ($localGroups->count() === 1) {
-            $localGroup = $localGroups->first();
-        } elseif ($localGroups->count() > 1) {
-            $localGroup = $localGroups->firstWhere('id', $this->request->localGroupId);
+        if ($groupOptions->count() === 1) {
+            $participantGroup = $groupOptions->first();
+        } elseif ($groupOptions->count() > 1) {
+            $participantGroup = $groupOptions->firstWhere('id', $this->request->localGroupId);
 
-            if ($localGroup === null) {
-                $response->message = 'Bitte einen Stamm auswählen.';
+            if ($participantGroup === null) {
+                $response->message = sprintf(
+                    'Bitte bei „%s" eine Auswahl treffen.',
+                    $this->request->event->participantGroupType()->label(),
+                );
                 return $response;
             }
         }
@@ -87,7 +92,7 @@ class ShortSignUpCommand {
             lastname: $this->request->lastname,
             nickname: $this->request->nickname,
             participationType: $participationType,
-            localGroup: $localGroup,
+            localGroup: $participantGroup instanceof Tenant ? $participantGroup : null,
             birthday: $this->request->birthday,
             address_1: self::PLACEHOLDER,
             address_2: null,
@@ -123,6 +128,7 @@ class ShortSignUpCommand {
             addonItems: [],
             feeType: $this->request->feeType,
             siblingReduction: false,
+            parentGroup: $participantGroup instanceof ParentGroup ? $participantGroup : null,
         );
 
         $signUpResponse = new SignUpCommand($signUpRequest)->execute();
diff --git a/app/Domains/Event/Actions/SignUp/SignUpCommand.php b/app/Domains/Event/Actions/SignUp/SignUpCommand.php
index 5f55320..f933bfb 100644
--- a/app/Domains/Event/Actions/SignUp/SignUpCommand.php
+++ b/app/Domains/Event/Actions/SignUp/SignUpCommand.php
@@ -61,6 +61,7 @@ class SignUpCommand {
                 'fee_type' => $this->request->feeType,
                 'sibling_reduction' => $this->request->siblingReduction,
                 'local_group' => $this->request->localGroup?->slug,
+                'parent_group_id' => $this->request->parentGroup?->id,
                 'birthday' => $this->request->birthday,
                 'address_1' => $this->request->address_1,
                 'address_2' => $this->request->address_2,
diff --git a/app/Domains/Event/Actions/SignUp/SignUpRequest.php b/app/Domains/Event/Actions/SignUp/SignUpRequest.php
index a106cfd..aaf62e2 100644
--- a/app/Domains/Event/Actions/SignUp/SignUpRequest.php
+++ b/app/Domains/Event/Actions/SignUp/SignUpRequest.php
@@ -3,6 +3,7 @@
 namespace App\Domains\Event\Actions\SignUp;
 
 use App\Models\Event;
+use App\Models\ParentGroup;
 use App\Models\Tenant;
 use App\ValueObjects\Amount;
 use DateTime;
@@ -55,6 +56,8 @@ class SignUpRequest {
         public ?string $feeType = null,
         /** Ob die 50-%-Geschwisterermäßigung in `amount` eingerechnet ist. */
         public bool $siblingReduction = false,
+        /** Parent Group -- nur bei Veranstaltungen, die danach statt nach der Local Group fragen. */
+        public ?ParentGroup $parentGroup = null,
     ) {
     }
 }
diff --git a/app/Domains/Event/Actions/UpdateEvent/UpdateEventCommand.php b/app/Domains/Event/Actions/UpdateEvent/UpdateEventCommand.php
index b6ce8d4..1e216a3 100644
--- a/app/Domains/Event/Actions/UpdateEvent/UpdateEventCommand.php
+++ b/app/Domains/Event/Actions/UpdateEvent/UpdateEventCommand.php
@@ -2,6 +2,8 @@
 
 namespace App\Domains\Event\Actions\UpdateEvent;
 
+use App\Repositories\EventParticipantRepository;
+
 class UpdateEventCommand {
     public UpdateEventRequest $request;
     public function __construct(UpdateEventRequest $request) {
@@ -26,6 +28,14 @@ class UpdateEventCommand {
         $this->request->event->registration_allowed = $this->request->registrationAllowed;
         $this->request->event->short_registration = $this->request->shortRegistration;
         $this->request->event->swimming_permission_required = $this->request->swimmingPermissionRequired;
+
+        // Umstellen zwischen Local und Parent Group nur ohne Anmeldungen -- sonst stünden in einer Veranstaltung
+        // beide Arten von Antworten nebeneinander.
+        if ($this->request->participantGroupType !== null
+            && !new EventParticipantRepository()->existsForEvent($this->request->event)) {
+            $this->request->event->participant_group_type = $this->request->participantGroupType->value;
+        }
+
         $this->request->event->save();
 
         $this->request->event->resetAllowedEatingHabits();
diff --git a/app/Domains/Event/Actions/UpdateEvent/UpdateEventRequest.php b/app/Domains/Event/Actions/UpdateEvent/UpdateEventRequest.php
index 2b34a50..5c9ad36 100644
--- a/app/Domains/Event/Actions/UpdateEvent/UpdateEventRequest.php
+++ b/app/Domains/Event/Actions/UpdateEvent/UpdateEventRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Domains\Event\Actions\UpdateEvent;
 
+use App\Enumerations\ParticipantGroupType;
 use App\Models\Event;
 use App\ValueObjects\Amount;
 use DateTime;
@@ -25,9 +26,12 @@ class UpdateEventRequest {
     public Amount $supportPerPerson;
     public array $contributingLocalGroups;
     public array $eatingHabits;
+    /** Wonach bei der Anmeldung gefragt wird; null = unverändert. Greift nur, solange es keine Anmeldungen gibt. */
+    public ?ParticipantGroupType $participantGroupType;
 
-    public function __construct(Event $event, string $eventName, string $eventLocation, string $postalCode, string $email, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $alcoholicsAge, bool $sendWeeklyReports, bool $registrationAllowed, Amount $flatSupport, Amount $supportPerPerson, array $contributingLocalGroups, array $eatingHabits, bool $shortRegistration = false, bool $swimmingPermissionRequired = true, ?string $street = null, ?string $houseNumber = null)
+    public function __construct(Event $event, string $eventName, string $eventLocation, string $postalCode, string $email, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $alcoholicsAge, bool $sendWeeklyReports, bool $registrationAllowed, Amount $flatSupport, Amount $supportPerPerson, array $contributingLocalGroups, array $eatingHabits, bool $shortRegistration = false, bool $swimmingPermissionRequired = true, ?string $street = null, ?string $houseNumber = null, ?ParticipantGroupType $participantGroupType = null)
     {
+        $this->participantGroupType = $participantGroupType;
         $this->event = $event;
         $this->eventName = $eventName;
         $this->eventLocation = $eventLocation;
diff --git a/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantCommand.php b/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantCommand.php
index ad12a81..a0f930b 100644
--- a/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantCommand.php
+++ b/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantCommand.php
@@ -31,9 +31,8 @@ class UpdateParticipantCommand {
         $p->address_2         = $this->request->address_2;
         $p->postcode          = $this->request->postcode;
         $p->city              = $this->request->city;
-        // Leerer String würde als Fremdschlüssel scheitern -- kein Stamm heißt null.
-        $p->local_group       = $this->request->localgroup ?: null;
-        $p->birthday          = DateTime::createFromFormat('Y-m-d', $this->request->birthday);
+        $this->applyParticipantGroup($p);
+        $p->birthday         = DateTime::createFromFormat('Y-m-d', $this->request->birthday);
         $p->email_1           = $this->request->email_1;
         $p->phone_1           = $this->request->phone_1;
         $p->contact_person    = $this->request->contact_person;
@@ -87,6 +86,29 @@ class UpdateParticipantCommand {
         return $this->response;
     }
 
+    /**
+     * Übernimmt die gewählte Gruppe -- je nach Veranstaltung die Local Group (Slug) oder die Parent Group (ID).
+     * Angenommen wird nur, was die Veranstaltung zur Auswahl stellt; leer heißt keine Angabe (null, ein leerer
+     * String würde als Fremdschlüssel scheitern).
+     */
+    private function applyParticipantGroup(EventParticipant $participant): void
+    {
+        $event = $participant->event;
+        $value = trim((string) $this->request->participantGroup);
+
+        if ($event->asksForParentGroup()) {
+            $participant->parent_group_id = $value === ''
+                ? null
+                : $event->participantGroupOptions()->firstWhere('id', (int) $value)?->id;
+
+            return;
+        }
+
+        $participant->local_group = $value === ''
+            ? null
+            : $event->participantGroupOptions()->firstWhere('slug', $value)?->slug;
+    }
+
     /**
      * Ersetzt die zugeordneten Zusätze (Event-Addons) anhand der Auswahl. Bewusst **ohne Preis/Betrag**
      * (amount 0): der Teilnahmebeitrag wird in den Details ohnehin manuell gesetzt. Es wird nur der Titel als
diff --git a/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantRequest.php b/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantRequest.php
index 6cce1bd..66ba20d 100644
--- a/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantRequest.php
+++ b/app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantRequest.php
@@ -14,8 +14,11 @@ class UpdateParticipantRequest {
         public ?string $address_2,
         public string $postcode,
         public string $city,
-        /** Stamm-Slug; leer/null bei Anmeldungen, die keinen Stamm erfasst haben (Kurzanmeldung). */
-        public ?string $localgroup,
+        /**
+         * Gewählte Gruppe: Slug der Local Group bzw. ID der Parent Group, je nachdem, wonach die Veranstaltung
+         * fragt. Leer/null = keine Angabe.
+         */
+        public ?string $participantGroup,
         public string $birthday,
         public string $email_1,
         public string $phone_1,
diff --git a/app/Domains/Event/Controllers/CreateController.php b/app/Domains/Event/Controllers/CreateController.php
index 8472a16..518a621 100644
--- a/app/Domains/Event/Controllers/CreateController.php
+++ b/app/Domains/Event/Controllers/CreateController.php
@@ -9,6 +9,7 @@ use App\Domains\Event\Actions\CreateEvent\CreateEventRequest;
 use App\Domains\Event\Actions\SetCostUnit\SetCostUnitCommand;
 use App\Domains\Event\Actions\SetCostUnit\SetCostUnitRequest;
 use App\Enumerations\CostUnitType;
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\ParticipationFeeType;
 use App\Providers\InertiaProvider;
 use App\Resources\EventResource;
@@ -28,6 +29,7 @@ class CreateController extends CommonController {
             'participationFeeType' => $this->tenant->slug === 'lv' ?
                 ParticipationFeeType::PARTICIPATION_FEE_TYPE_FIXED :
                 ParticipationFeeType::PARTICIPATION_FEE_TYPE_SOLIDARITY,
+            'participantGroupTypes' => ParticipantGroupType::options(),
         ])->render();
     }
 
@@ -58,7 +60,8 @@ class CreateController extends CommonController {
             $request->input('eventIban'),
             $payPerDay,
             $request->input('eventStreet'),
-            $request->input('eventHouseNumber')
+            $request->input('eventHouseNumber'),
+            ParticipantGroupType::fromStored($request->input('eventParticipantGroupType')),
         );
 
         $wasSuccessful = false;
diff --git a/app/Domains/Event/Controllers/DetailsController.php b/app/Domains/Event/Controllers/DetailsController.php
index dafa548..0db288a 100644
--- a/app/Domains/Event/Controllers/DetailsController.php
+++ b/app/Domains/Event/Controllers/DetailsController.php
@@ -14,6 +14,7 @@ use App\Domains\Event\Actions\UpdateEvent\UpdateEventCommand;
 use App\Domains\Event\Actions\UpdateEvent\UpdateEventRequest;
 use App\Domains\Event\Actions\UpdateManagers\UpdateManagersCommand;
 use App\Domains\Event\Actions\UpdateManagers\UpdateManagersRequest;
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\ParticipationFeeType;
 use App\Enumerations\ParticipationType;
 use App\Providers\InertiaProvider;
@@ -27,7 +28,10 @@ use Illuminate\Http\Response;
 class DetailsController extends CommonController {
     public function __invoke(string $eventId) {
         $event = $this->events->getByIdentifier($eventId);
-        return new InertiaProvider('Event/Details', ['event' => $event])->render();
+        return new InertiaProvider('Event/Details', [
+            'event' => $event,
+            'participantGroupLabel' => $event->participantGroupType()->label(),
+        ])->render();
     }
 
     public function summary(int $eventId, Request $request) : JsonResponse {
@@ -65,6 +69,7 @@ class DetailsController extends CommonController {
             (bool)$request->input('swimmingPermissionRequired', true),
             $request->input('street'),
             $request->input('houseNumber'),
+            ParticipantGroupType::tryFrom((string) $request->input('participantGroupType')),
         );
 
         $eventUpdateCommand = new UpdateEventCommand($eventUpdateRequest);
@@ -185,6 +190,7 @@ class DetailsController extends CommonController {
             'rows' => $participants,
             'kitchenRequirements' => $kitchenOverview,
             'participantsForKitchenList' => $this->eventParticipants->getParticipantsWithIntolerances($event, $request),
+            'participantGroupLabel' => $event->participantGroupType()->label(),
         ])->render();
 
         $pdf = PdfGenerateAndDownloadProvider::fromHtml(
@@ -208,6 +214,9 @@ class DetailsController extends CommonController {
         $csv = view('csvs.' . $listType, [
             'event' => $event->name,
             'rows' => $participants,
+            // Die Anschriftsspalten beschreiben immer die Local Group, die Gruppenspalte die gewählte Gruppe.
+            'localGroupLabel' => ParticipantGroupType::LocalGroup->label(),
+            'participantGroupLabel' => $event->participantGroupType()->label(),
         ])->render();
 
         return response($csv, 200, [
@@ -220,7 +229,7 @@ class DetailsController extends CommonController {
         $event = $this->events->getByIdentifier($eventId);
         switch ($listType) {
             case 'by-local-group':
-                $participants = $this->eventParticipants->groupByLocalGroup($event, $request);
+                $participants = $this->eventParticipants->groupByParticipantGroup($event, $request);
                 break;
             case 'by-participation-group':
                 $participants = $this->eventParticipants->groupByParticipationType($event, $request);
diff --git a/app/Domains/Event/Controllers/MailCompose/ByGroupController.php b/app/Domains/Event/Controllers/MailCompose/ByGroupController.php
index 9865ce5..84ba8d8 100644
--- a/app/Domains/Event/Controllers/MailCompose/ByGroupController.php
+++ b/app/Domains/Event/Controllers/MailCompose/ByGroupController.php
@@ -12,7 +12,7 @@ class ByGroupController extends CommonController
         $recipients = [];
         switch ($groupType) {
             case 'by-local-group':
-                $participants = $this->eventParticipants->groupByLocalGroup($event, $request, $request->input('groupName'));
+                $participants = $this->eventParticipants->groupByParticipantGroup($event, $request, $request->input('groupName'));
                 $recipients = $this->eventParticipants->getMailAddresses($participants[$request->input('groupName')]);
                 break;
             case 'by-participation-group':
diff --git a/app/Domains/Event/Controllers/ParticipantUpdateController.php b/app/Domains/Event/Controllers/ParticipantUpdateController.php
index 50911aa..ed33851 100644
--- a/app/Domains/Event/Controllers/ParticipantUpdateController.php
+++ b/app/Domains/Event/Controllers/ParticipantUpdateController.php
@@ -22,7 +22,7 @@ class ParticipantUpdateController extends CommonController {
             address_2: $request->input('address_2'),
             postcode: $request->input('postcode'),
             city: $request->input('city'),
-            localgroup: $request->input('localgroup'),
+            participantGroup: $request->input('participantGroup'),
             birthday: $request->input('birthday'),
             email_1: $request->input('email_1'),
             phone_1: $request->input('phone_1'),
diff --git a/app/Domains/Event/Controllers/SignupController.php b/app/Domains/Event/Controllers/SignupController.php
index 70c615e..fa644f0 100644
--- a/app/Domains/Event/Controllers/SignupController.php
+++ b/app/Domains/Event/Controllers/SignupController.php
@@ -7,6 +7,7 @@ use App\Domains\Event\Actions\CertificateOfConductionCheck\CertificateOfConducti
 use App\Domains\Event\Actions\SignUp\SignUpCommand;
 use App\Domains\Event\Actions\SignUp\SignUpRequest;
 use App\Mail\ParticipantParticipationMails\EventSignUpSuccessfullMail;
+use App\Models\ParentGroup;
 use App\Models\Tenant;
 use App\Providers\DoubleCheckEventRegistrationProvider;
 use App\Providers\InertiaProvider;
@@ -65,7 +66,7 @@ class SignupController extends CommonController {
         $inertiaProvider = new InertiaProvider('Event/Signup', [
             'event' => $event,
             'availableEvents' => $availableEvents,
-            'localGroups' => $event['contributingLocalGroups'],
+            'localGroups' => $event['participantGroupOptions'] ?? [],
             'participantData' => $participantData,
         ]);
         return $inertiaProvider->render();
@@ -111,6 +112,15 @@ class SignupController extends CommonController {
         $addonResolution = $eventResource->resolveAddons($selectedAddonKeys, $arrival, $departure);
         $amount->addAmount($addonResolution['total']);
 
+        // Gewählt wird eine der Optionen der Veranstaltung (Local oder Parent Group); anderes wird abgelehnt.
+        $participantGroup = $event->participantGroupOptions()->firstWhere('id', (int)($registrationData['localGroup'] ?? 0));
+        if ($participantGroup === null) {
+            return response()->json([
+                'status' => 'error',
+                'message' => sprintf('Bitte bei „%s" eine Auswahl treffen.', $event->participantGroupType()->label()),
+            ], 422);
+        }
+
         $signupRequest = new SignUpRequest(
             $event,
             $registrationData['userId'] ?? null,
@@ -118,7 +128,7 @@ class SignupController extends CommonController {
             $registrationData['nachname'],
             $registrationData['pfadiname'],
             $registrationData['participationType'],
-            Tenant::findOrFail($registrationData['localGroup']),
+            $participantGroup instanceof Tenant ? $participantGroup : null,
             \DateTime::createFromFormat('Y-m-d', $registrationData['geburtsdatum']),
             $registrationData['address1'],
             $registrationData['address2'],
@@ -153,6 +163,7 @@ class SignupController extends CommonController {
             $addonResolution['items'],
             $registrationData['beitrag'],
             $siblingReduction,
+            $participantGroup instanceof ParentGroup ? $participantGroup : null,
         );
 
         $signupCommand = new SignUpCommand($signupRequest);
diff --git a/app/Domains/Event/Views/Create.vue b/app/Domains/Event/Views/Create.vue
index d6f7aad..6d41a1e 100644
--- a/app/Domains/Event/Views/Create.vue
+++ b/app/Domains/Event/Views/Create.vue
@@ -15,6 +15,7 @@
         'eventIban': String,
         "eventPayPerDay": Boolean,
         "participationFeeType": String,
+        "participantGroupTypes": {type: Array, default: () => []},
     })
 
     const errors = reactive({})
@@ -35,6 +36,7 @@
         eventIban: props.eventIban ? props.eventIban : '',
         eventPayPerDay: props.eventPayPerDay ? props.eventPayPerDay : false,
         eventParticipationFeeType: props.participationFeeType ? props.participationFeeType : 'fixed',
+        eventParticipantGroupType: 'local_group',
     });
 
     watch(
@@ -159,6 +161,7 @@
                 eventIban: formData.eventIban,
                 eventPayPerDay: formData.eventPayPerDay,
                 eventParticipationFeeType: formData.eventParticipationFeeType,
+                eventParticipantGroupType: formData.eventParticipantGroupType,
             }
         });
 
@@ -256,6 +259,15 @@
                     </td>
                 </tr>
 
+                <tr style="vertical-align: top;">
+                    <th class="width-medium pr-20 height-50">Bei der Anmeldung abfragen</th>
+                    <td class="height-50">
+                        <select v-model="formData.eventParticipantGroupType" class="width-half-full">
+                            <option v-for="type in props.participantGroupTypes" :key="type.value" :value="type.value">{{ type.label }}</option>
+                        </select>
+                    </td>
+                </tr>
+
 
                 <tr style="vertical-align: top;">
                     <th class="width-medium pr-20 height-50">Preiserhöhung nach Early-Bird-Phase</th>
diff --git a/app/Domains/Event/Views/Details.vue b/app/Domains/Event/Views/Details.vue
index 6476ad8..c9d8508 100644
--- a/app/Domains/Event/Views/Details.vue
+++ b/app/Domains/Event/Views/Details.vue
@@ -10,6 +10,7 @@ import Overview from "./Partials/Overview.vue";
 
 const props = defineProps({
     event: Object,
+    participantGroupLabel: {type: String, default: 'Stamm'},
 })
 
 const tabs = [
@@ -24,7 +25,7 @@ const tabs = [
         endpoint: "/api/v1/event/details/" + props.event.identifier + '/participants/all',
     },
     {
-        title: 'Teilis nach Stamm',
+        title: 'Teilis nach ' + props.participantGroupLabel,
         component: ParticipantsList,
         endpoint: "/api/v1/event/details/" + props.event.identifier + '/participants/by-local-group',
     },
diff --git a/app/Domains/Event/Views/Partials/CommonSettings.vue b/app/Domains/Event/Views/Partials/CommonSettings.vue
index c46e2ea..568ec84 100644
--- a/app/Domains/Event/Views/Partials/CommonSettings.vue
+++ b/app/Domains/Event/Views/Partials/CommonSettings.vue
@@ -16,8 +16,13 @@ const emit = defineEmits(['close'])
     const dynmicProps = reactive({
         localGroups: [],
         eatingHabits:[],
+        participantGroupTypes: [],
+        localGroupLabelPlural: 'Stämme',
     });
 
+    // Umstellen zwischen Local und Parent Group nur, solange es keine Anmeldungen gibt.
+    const participantGroupTypeLocked = (props.event.totalParticipantCount ?? 0) > 0
+
     const contributingLocalGroups = ref([])
     const eatingHabits = ref([]);
 
@@ -41,6 +46,7 @@ const emit = defineEmits(['close'])
         swimmingPermissionRequired: props.event.swimmingPermissionRequired,
         flatSupport: props.event.flatSupportEdit,
         supportPerson: props.event.supportPersonIndex,
+        participantGroupType: props.event.participantGroupType ?? 'local_group',
     })
 
     onMounted(async () => {
@@ -76,6 +82,7 @@ const emit = defineEmits(['close'])
                 supportPerson: formData.supportPerson,
                 contributingLocalGroups: contributingLocalGroups.value,
                 eatingHabits: eatingHabits.value,
+                participantGroupType: formData.participantGroupType,
             }
         })
 
@@ -173,6 +180,18 @@ const emit = defineEmits(['close'])
                         </td>
                     </tr>
 
+                    <tr>
+                        <th>Bei der Anmeldung abfragen</th>
+                        <td>
+                            <select v-model="formData.participantGroupType" class="width-full" :disabled="participantGroupTypeLocked">
+                                <option v-for="type in dynmicProps.participantGroupTypes" :key="type.value" :value="type.value">{{ type.label }}</option>
+                            </select>
+                            <span v-if="participantGroupTypeLocked" style="font-size: 0.8rem; color: #6b7280;">
+                                Nicht mehr änderbar, da bereits Anmeldungen vorliegen.
+                            </span>
+                        </td>
+                    </tr>
+
                     <tr>
                         <th>Mindestalter für Alkoholkonsum</th>
                         <td>
@@ -223,7 +242,7 @@ const emit = defineEmits(['close'])
             <div class="right">
                 <table>
                     <tr>
-                        <th>Teilnehmende Stämme</th>
+                        <th>Teilnehmende {{ dynmicProps.localGroupLabelPlural }}</th>
                     </tr>
                     <tr v-for="localGroup in  dynmicProps.localGroups">
                         <td>
diff --git a/app/Domains/Event/Views/Partials/ParticipantData.vue b/app/Domains/Event/Views/Partials/ParticipantData.vue
index 15ad0e3..0b963f8 100644
--- a/app/Domains/Event/Views/Partials/ParticipantData.vue
+++ b/app/Domains/Event/Views/Partials/ParticipantData.vue
@@ -42,7 +42,7 @@ const form = reactive({
     address_2: '',
     postcode: '',
     city: '',
-    localgroup: '',
+    participantGroup: '',
     birthday: '',
     email_1: '',
     phone_1: '',
@@ -71,6 +71,9 @@ const form = reactive({
 // Teilnahmeoptionen des Events (Definition mit Titel/Frage/Optionen).
 const participationQuestions = computed(() => staticProps.event?.participationOptions ?? []);
 
+// Bezeichnung der gewählten Gruppe (z. B. „Stamm" oder „Bund"), je nach Einstellung der Veranstaltung.
+const localGroupLabel = computed(() => staticProps.event?.participantGroupLabel ?? 'Stamm');
+
 // Zusatzoptionen (Event-Addons) des Events.
 const eventAddons = computed(() => staticProps.event?.addons ?? []);
 
@@ -95,7 +98,7 @@ watch(
         form.address_2 = participant?.address_2 ?? '';
         form.postcode = participant?.postcode ?? '';
         form.city = participant?.city ?? '';
-        form.localgroup = participant?.local_group ?? '';
+        form.participantGroup = participant?.participantGroupValue ?? '';
         form.birthday = participant?.birthdayDate ?? '';
         form.email_1 = participant?.email_1 ?? '';
         form.phone_1 = participant?.phone_1 ?? '';
@@ -229,12 +232,12 @@ function saveParticipant() {
                     </tr>
 
                     <tr>
-                        <th>Stamm</th>
+                        <th>{{ localGroupLabel }}</th>
                         <td>
-                            <span v-if="!staticProps.editMode">{{ props.participant.localgroup }}</span>
-                            <select v-else v-model="form.localgroup">
-                                <option value="">Kein Stamm</option>
-                                <option v-for="group in staticProps.event.contributingLocalGroups" :key="group.id" :value="group.slug">{{ group.name }}</option>
+                            <span v-if="!staticProps.editMode">{{ props.participant.participantGroup }}</span>
+                            <select v-else v-model="form.participantGroup">
+                                <option value="">Keine Angabe</option>
+                                <option v-for="group in staticProps.event.participantGroupOptions" :key="group.id" :value="group.value">{{ group.name }}</option>
                             </select>
                         </td>
                     </tr>
diff --git a/app/Domains/Event/Views/Partials/ParticipantsList.vue b/app/Domains/Event/Views/Partials/ParticipantsList.vue
index bc85933..e1d4a60 100644
--- a/app/Domains/Event/Views/Partials/ParticipantsList.vue
+++ b/app/Domains/Event/Views/Partials/ParticipantsList.vue
@@ -162,7 +162,7 @@ async function saveParticipant(formData) {
         document.getElementById('participant-' + data.participant.identifier + '-fullname').innerHTML = data.participant.fullname;
         document.getElementById('participant-' + data.participant.identifier + '-birthday').innerText = data.participant.birthday;
         document.getElementById('participant-' + data.participant.identifier + '-age').innerText = data.participant.age;
-        document.getElementById('participant-' + data.participant.identifier + '-localgroup').innerText = data.participant.localgroup;
+        document.getElementById('participant-' + data.participant.identifier + '-localgroup').innerText = data.participant.participantGroup;
         document.getElementById('participant-' + data.participant.identifier + '-arrival').innerText = data.participant.arrival;
         document.getElementById('participant-' + data.participant.identifier + '-departure').innerText = data.participant.departure;
         document.getElementById('participant-' + data.participant.identifier + '-email_1').innerText = data.participant.email_1;
@@ -641,7 +641,7 @@ function mailToGroup(groupKey) {
                     <tr class="participant-meta-row"  :id="'participant-' + participant.identifier + '-meta'">
                         <td colspan="5" class="pl-meta">
                             <label :id="'participant-' + participant.identifier +'-localgroup'">
-                                {{ participant?.localgroup ?? "-" }}
+                                {{ participant?.participantGroup ?? "-" }}
                             </label> |
                             <strong> Anreise: </strong>
                             <label :id="'participant-' + participant.identifier +'-arrival'">
diff --git a/app/Domains/Event/Views/Partials/ShortSignUpForm/composables/useShortSignupForm.js b/app/Domains/Event/Views/Partials/ShortSignUpForm/composables/useShortSignupForm.js
index f645f93..b103041 100644
--- a/app/Domains/Event/Views/Partials/ShortSignUpForm/composables/useShortSignupForm.js
+++ b/app/Domains/Event/Views/Partials/ShortSignUpForm/composables/useShortSignupForm.js
@@ -13,10 +13,12 @@ export function useShortSignupForm(event, participantData) {
     // Gibt es nur eine Zahlungsart, wird sie vorausgewählt und der Zahlungsschritt entfällt.
     const activeMethods = (event.paymentMethods ?? []).filter(m => m.active)
 
-    // Bei genau einem teilnehmenden Stamm wird dieser gesetzt, ohne danach zu fragen; erst ab zwei
-    // Stämmen erscheint das Auswahlfeld.
-    const localGroups = event.contributingLocalGroups ?? []
+    // Auswahl je nach Veranstaltung: teilnehmende Stämme oder deren Bünde. Bei genau einer Option wird diese
+    // gesetzt, ohne danach zu fragen; erst ab zwei Optionen erscheint das Auswahlfeld.
+    const localGroups = event.participantGroupOptions ?? []
     const needsLocalGroup = localGroups.length > 1
+    // Vorbelegung mit dem Stamm des eingeloggten Nutzers nur, wenn er zur Auswahl gehört (bei Bund-Abfrage nie).
+    const preselectedGroup = localGroups.some(g => g.id === participantData.localGroup) ? participantData.localGroup : '-1'
 
     const formData = reactive({
         userId: participantData.id,
@@ -26,7 +28,7 @@ export function useShortSignupForm(event, participantData) {
         geburtsdatum: participantData.birthday ?? '',
         email_1: participantData.email ?? '',
         telefon_1: participantData.phone ?? '',
-        localGroup: localGroups.length === 1 ? localGroups[0].id : (participantData.localGroup ?? '-1'),
+        localGroup: localGroups.length === 1 ? localGroups[0].id : preselectedGroup,
         ansprechpartner: '',
         email_2: '',
         allergien: participantData.allergies ?? '',
diff --git a/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepPerson.vue b/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepPerson.vue
index 0b3e625..e3d7a47 100644
--- a/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepPerson.vue
+++ b/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepPerson.vue
@@ -11,6 +11,9 @@ const props = defineProps({
 })
 const emit = defineEmits(['next'])
 
+// Bezeichnung der Auswahl (z. B. „Stamm" oder „Bund"), je nach Einstellung der Veranstaltung.
+const localGroupLabel = props.event?.participantGroupLabel ?? 'Stamm'
+
 const errors = reactive({
     vorname: '',
     nachname: '',
@@ -46,7 +49,7 @@ const next = () => {
     }
 
     if (props.needsLocalGroup && (!props.formData.localGroup || props.formData.localGroup === '-1')) {
-        errors.localGroup = 'Bitte einen Stamm auswählen.'
+        errors.localGroup = 'Bitte bei „' + localGroupLabel + '" eine Auswahl treffen.'
         hasError = true
     }
 
@@ -122,7 +125,7 @@ const next = () => {
                 </td>
             </tr>
             <tr v-if="needsLocalGroup">
-                <td>Stamm:</td>
+                <td>{{ localGroupLabel }}:</td>
                 <td>
                     <select v-model="formData.localGroup">
                         <option value="-1">Bitte wählen</option>
diff --git a/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepSummary.vue b/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepSummary.vue
index 1b1b7c4..f44d45e 100644
--- a/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepSummary.vue
+++ b/app/Domains/Event/Views/Partials/ShortSignUpForm/steps/ShortStepSummary.vue
@@ -43,9 +43,9 @@ const selectedParticipationOptions = computed(() =>
     }).filter(entry => entry.value !== '')
 )
 
-// Der Stamm steht entweder fest (genau ein teilnehmender Stamm) oder wurde auf Seite 1 gewählt.
+// Die Gruppe (Stamm oder Bund) steht entweder fest (genau eine Option) oder wurde auf Seite 1 gewählt.
 const localGroupName = computed(() =>
-    (props.event.contributingLocalGroups ?? []).find(g => g.id === props.formData.localGroup)?.name ?? null
+    (props.event.participantGroupOptions ?? []).find(g => g.id === props.formData.localGroup)?.name ?? null
 )
 
 const permissionName = (list, slug) =>
@@ -84,7 +84,7 @@ const canSubmit = computed(() =>
                     <td>{{ formData.telefon_1 }}</td>
                 </tr>
                 <tr v-if="localGroupName">
-                    <td>Stamm:</td>
+                    <td>{{ event.participantGroupLabel ?? 'Stamm' }}:</td>
                     <td>{{ localGroupName }}</td>
                 </tr>
 
diff --git a/app/Domains/Event/Views/Partials/SignUpForm/SignupForm.vue b/app/Domains/Event/Views/Partials/SignUpForm/SignupForm.vue
index e051dd2..11c008b 100644
--- a/app/Domains/Event/Views/Partials/SignUpForm/SignupForm.vue
+++ b/app/Domains/Event/Views/Partials/SignUpForm/SignupForm.vue
@@ -92,7 +92,7 @@ const steps = [
             <form @submit.prevent="submit">
                 <StepAge            v-if="currentStep === 1" :event="event" @next="goToStep" />
                 <StepContactPerson  v-if="currentStep === 2" :formData="formData" :event="event" @next="goToStep" @back="goToStep" />
-                <StepPersonalData   v-if="currentStep === 3" :formData="formData" :localGroups="localGroups" @next="goToStep" @back="goToStep" />
+                <StepPersonalData   v-if="currentStep === 3" :formData="formData" :event="event" :localGroups="localGroups" @next="goToStep" @back="goToStep" />
                 <StepArrival        v-if="currentStep === 4" :formData="formData" :event="event" @next="goToStep" @back="goToStep" />
                 <StepRegistrationMode v-if="currentStep === 5" :formData="formData" :event="event" @next="goToStep" @back="goToStep" />
                 <StepAddons         v-if="currentStep === 6" :formData="formData" :event="event" :selectedAddons="selectedAddons" @next="goToStep" @back="goToStep" />
diff --git a/app/Domains/Event/Views/Partials/SignUpForm/composables/useSignupForm.js b/app/Domains/Event/Views/Partials/SignUpForm/composables/useSignupForm.js
index a68615b..18e5ada 100644
--- a/app/Domains/Event/Views/Partials/SignUpForm/composables/useSignupForm.js
+++ b/app/Domains/Event/Views/Partials/SignUpForm/composables/useSignupForm.js
@@ -24,7 +24,10 @@ export function useSignupForm(event, participantData) {
         vorname: participantData.firstname ?? '',
         nachname: participantData.lastname ?? '',
         pfadiname: participantData.nickname ?? '',
-        localGroup: participantData.localGroup ?? '-1',
+        // Vorbelegung mit dem Stamm des eingeloggten Nutzers nur, wenn er zur Auswahl gehört (bei Bund-Abfrage nie).
+        localGroup: (event.participantGroupOptions ?? []).some(g => g.id === participantData.localGroup)
+            ? participantData.localGroup
+            : '-1',
         geburtsdatum: participantData.birthday ?? '',
         address1: participantData.address_1 ?? '',
         address2: participantData.address_2 ?? '',
diff --git a/app/Domains/Event/Views/Partials/SignUpForm/steps/StepPersonalData.vue b/app/Domains/Event/Views/Partials/SignUpForm/steps/StepPersonalData.vue
index 0decc27..cb08873 100644
--- a/app/Domains/Event/Views/Partials/SignUpForm/steps/StepPersonalData.vue
+++ b/app/Domains/Event/Views/Partials/SignUpForm/steps/StepPersonalData.vue
@@ -2,9 +2,12 @@
 import {reactive} from "vue";
 import ErrorText from "../../../../../../Views/Components/ErrorText.vue";
 
-const props = defineProps({ formData: Object, localGroups: Array })
+const props = defineProps({ formData: Object, event: Object, localGroups: Array })
 const emit = defineEmits(['next', 'back'])
 
+// Bezeichnung der Auswahl (z. B. „Stamm" oder „Bund"), je nach Einstellung der Veranstaltung.
+const localGroupLabel = props.event?.participantGroupLabel ?? 'Stamm'
+
 const errors = reactive({
     vorname: '',
     nachname: '',
@@ -46,7 +49,7 @@ const next = () => {
     }
 
     if (props.formData.localGroup === '-1') {
-        errors.localGroup = 'Bitte den Stamm auswählen.'
+        errors.localGroup = 'Bitte bei „' + localGroupLabel + '" eine Auswahl treffen.'
         hasError = true
     }
 
@@ -90,7 +93,7 @@ const next = () => {
             <tr><td>Nachname:</td><td><input type="text" v-model="props.formData.nachname" /><ErrorText :message="errors.nachname"/></td></tr>
             <tr><td>Pfadiname:</td><td><input type="text" v-model="props.formData.pfadiname" /></td></tr>
             <tr>
-                <td>Stamm:</td>
+                <td>{{ localGroupLabel }}:</td>
                 <td>
                     <select v-model="props.formData.localGroup">
                         <option value="-1">Bitte wählen</option>
diff --git a/app/Enumerations/ParticipantGroupType.php b/app/Enumerations/ParticipantGroupType.php
new file mode 100644
index 0000000..c52f761
--- /dev/null
+++ b/app/Enumerations/ParticipantGroupType.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Enumerations;
+
+use App\Models\GlobalSetting;
+use App\Repositories\GlobalSettingRepository;
+
+/**
+ * Wonach eine Veranstaltung bei der Anmeldung fragt: nach der Local Group (Mandant, im UI z. B. „Stamm") oder nach
+ * der Parent Group (übergeordnete Gruppe, im UI z. B. „Bund"). Die Bezeichnungen kommen aus den globalen
+ * Einstellungen.
+ */
+enum ParticipantGroupType: string
+{
+    case LocalGroup = 'local_group';
+    case ParentGroup = 'parent_group';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::LocalGroup => self::setting(GlobalSetting::LOCAL_GROUP_LABEL, 'Stamm'),
+            self::ParentGroup => self::setting(GlobalSetting::PARENT_GROUP_LABEL, 'Bund'),
+        };
+    }
+
+    public function pluralLabel(): string
+    {
+        return match ($this) {
+            self::LocalGroup => self::setting(GlobalSetting::LOCAL_GROUP_LABEL_PLURAL, 'Stämme'),
+            self::ParentGroup => self::setting(GlobalSetting::PARENT_GROUP_LABEL_PLURAL, 'Bünde'),
+        };
+    }
+
+    /**
+     * Optionen für das Frontend: [['value' => ..., 'label' => ...], ...].
+     *
+     * @return array<int, array{value: string, label: string}>
+     */
+    public static function options(): array
+    {
+        return array_map(
+            static fn (self $type): array => [
+                'value' => $type->value,
+                'label' => $type->label(),
+            ],
+            self::cases(),
+        );
+    }
+
+    /** Typ zu einem gespeicherten Wert; Unbekanntes fällt auf die Local Group zurück. */
+    public static function fromStored(?string $value): self
+    {
+        return self::tryFrom((string) $value) ?? self::LocalGroup;
+    }
+
+    /**
+     * Alle Bezeichnungen fürs Frontend (Shared Prop).
+     *
+     * @return array{localGroup: string, localGroupPlural: string, parentGroup: string, parentGroupPlural: string}
+     */
+    public static function labels(): array
+    {
+        return [
+            'localGroup' => self::LocalGroup->label(),
+            'localGroupPlural' => self::LocalGroup->pluralLabel(),
+            'parentGroup' => self::ParentGroup->label(),
+            'parentGroupPlural' => self::ParentGroup->pluralLabel(),
+        ];
+    }
+
+    private static function setting(string $key, string $default): string
+    {
+        return app(GlobalSettingRepository::class)->get($key, $default);
+    }
+}
diff --git a/app/Models/Event.php b/app/Models/Event.php
index 33b13eb..708048f 100644
--- a/app/Models/Event.php
+++ b/app/Models/Event.php
@@ -5,6 +5,7 @@ namespace App\Models;
 
 use App\Casts\AmountCast;
 use App\Enumerations\EatingHabit;
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\ParticipationFeeType;
 use App\RelationModels\EventParticipationFee;
 use App\RelationModels\EventPaymentMethods;
@@ -13,6 +14,7 @@ use DateTime;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Collection;
 
 /**
  * @property string $tenant
@@ -50,6 +52,7 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
  * @property boolean $short_registration
  * @property boolean $swimming_permission_required
  * @property string|null $invoice_key
+ * @property string $participant_group_type
  */
 class Event extends InstancedModel
 {
@@ -101,6 +104,7 @@ class Event extends InstancedModel
         'swimming_permission_required',
 
         'invoice_key',
+        'participant_group_type',
     ];
 
     protected $casts = [
@@ -186,6 +190,33 @@ class Event extends InstancedModel
         return $this->belongsToMany(Tenant::class, 'event_local_groups', 'event_id', 'local_group_id');
     }
 
+    public function participantGroupType() : ParticipantGroupType {
+        return ParticipantGroupType::fromStored($this->participant_group_type);
+    }
+
+    public function asksForParentGroup() : bool {
+        return $this->participantGroupType() === ParticipantGroupType::ParentGroup;
+    }
+
+    /**
+     * Was bei der Anmeldung zur Auswahl steht: die teilnehmenden Local Groups oder -- fragt die Veranstaltung nach der
+     * Parent Group -- deren Parent Groups, jede nur einmal (alphabetisch, „Ohne Zuordnung" zuletzt).
+     * Einzige Quelle für Anzeige und Prüfung der Auswahl.
+     *
+     * @return Collection<int, Tenant>|Collection<int, ParentGroup>
+     */
+    public function participantGroupOptions() : Collection {
+        $localGroups = $this->localGroups()->with('parentGroup')->get();
+
+        if (!$this->asksForParentGroup()) {
+            return $localGroups;
+        }
+
+        return ParentGroup::sortForDisplay(
+            $localGroups->pluck('parentGroup')->filter()->unique('id')
+        );
+    }
+
     public function eatingHabits()  : BelongsToMany{
         return $this->belongsToMany(EatingHabit::class, 'event_allowed_eating_habits', 'event_id', 'eating_habit_id');
     }
diff --git a/app/Models/EventParticipant.php b/app/Models/EventParticipant.php
index 46a79b1..b71ae7e 100644
--- a/app/Models/EventParticipant.php
+++ b/app/Models/EventParticipant.php
@@ -38,6 +38,7 @@ class EventParticipant extends InstancedModel
         'fee_type',
         'sibling_reduction',
         'local_group',
+        'parent_group_id',
         'birthday',
 
         'address_1',
@@ -143,6 +144,22 @@ class EventParticipant extends InstancedModel
         return $this->belongsTo(Tenant::class, 'local_group', 'slug');
     }
 
+    /** Parent Group -- nur bei Veranstaltungen gesetzt, die danach statt nach der Local Group fragen. */
+    public function parentGroup()
+    {
+        return $this->belongsTo(ParentGroup::class, 'parent_group_id');
+    }
+
+    /** Anzeigename der bei der Anmeldung gewählten Gruppe, je nachdem, wonach die Veranstaltung fragt. */
+    public function participantGroupName(Event $event) : string
+    {
+        if ($event->asksForParentGroup()) {
+            return $this->parentGroup?->name ?? 'Keine Angabe';
+        }
+
+        return $this->localGroup?->name ?? 'Nicht im LV';
+    }
+
     public function participationType()
     {
         return $this->belongsTo(ParticipationType::class, 'participation_type', 'slug');
diff --git a/app/Models/GlobalSetting.php b/app/Models/GlobalSetting.php
new file mode 100644
index 0000000..4ba8a19
--- /dev/null
+++ b/app/Models/GlobalSetting.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Models;
+
+use App\Scopes\CommonModel;
+
+/**
+ * App-weite Einstellung als Schlüssel/Wert-Paar (z. B. die Bezeichnungen „Stamm"/„Bund").
+ * Nicht mandantengebunden; gelesen wird über {@see \App\Repositories\GlobalSettingRepository}.
+ *
+ * @property string $key
+ * @property string $value
+ */
+class GlobalSetting extends CommonModel
+{
+    public const string LOCAL_GROUP_LABEL = 'local_group_label';
+    public const string LOCAL_GROUP_LABEL_PLURAL = 'local_group_label_plural';
+    public const string PARENT_GROUP_LABEL = 'parent_group_label';
+    public const string PARENT_GROUP_LABEL_PLURAL = 'parent_group_label_plural';
+
+    protected $table = 'global_settings';
+    protected $primaryKey = 'key';
+    protected $keyType = 'string';
+    public $incrementing = false;
+
+    protected $fillable = [
+        'key',
+        'value',
+    ];
+}
diff --git a/app/Models/ParentGroup.php b/app/Models/ParentGroup.php
new file mode 100644
index 0000000..a89ba4f
--- /dev/null
+++ b/app/Models/ParentGroup.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Models;
+
+use App\Scopes\CommonModel;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Collection;
+
+/**
+ * Übergeordnete Gruppe (Parent Group, im UI z. B. „Bund"). Mehrere Mandanten (Local Groups) gehören zur selben
+ * Parent Group. Nicht mandantengebunden -- die Liste gilt app-weit.
+ *
+ * @property int $id
+ * @property string $name
+ * @property boolean $is_fallback
+ */
+class ParentGroup extends CommonModel
+{
+    protected $table = 'parent_groups';
+
+    protected $fillable = [
+        'name',
+        'is_fallback',
+    ];
+
+    protected $casts = [
+        'is_fallback' => 'boolean',
+    ];
+
+    /** Die Gruppe „Ohne Zuordnung" -- Vorgabe für Mandanten, denen keine Gruppe zugewiesen wurde. */
+    public static function fallback() : self {
+        return self::where('is_fallback', true)->orderBy('id')->firstOrFail();
+    }
+
+    /** Anzeigereihenfolge: alphabetisch, „Ohne Zuordnung" (Fallback) immer zuletzt. */
+    public function scopeOrdered(Builder $query) : Builder {
+        return $query->orderBy('is_fallback')->orderBy('name');
+    }
+
+    /**
+     * Dieselbe Reihenfolge wie {@see scopeOrdered()} für bereits geladene Gruppen.
+     *
+     * @param Collection<int, self> $parentGroups
+     * @return Collection<int, self>
+     */
+    public static function sortForDisplay(Collection $parentGroups) : Collection {
+        return $parentGroups
+            ->sort(static fn (self $a, self $b): int =>
+                [$a->is_fallback, mb_strtolower($a->name)] <=> [$b->is_fallback, mb_strtolower($b->name)])
+            ->values();
+    }
+
+    public function tenants() : HasMany {
+        return $this->hasMany(Tenant::class, 'parent_group_id');
+    }
+
+    public function eventParticipants() : HasMany {
+        return $this->hasMany(EventParticipant::class, 'parent_group_id');
+    }
+}
diff --git a/app/Models/Tenant.php b/app/Models/Tenant.php
index 6c8c149..a770ff0 100644
--- a/app/Models/Tenant.php
+++ b/app/Models/Tenant.php
@@ -4,6 +4,7 @@ namespace App\Models;
 
 use App\Scopes\CommonModel;
 use App\Support\Text;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
  * @property string $slug
@@ -35,6 +36,7 @@ use App\Support\Text;
  * @property string|null $tax_exemption_reason
  * @property string|null $tax_exemption_note
  * @property string $vat_pricing_mode
+ * @property int $parent_group_id
  */
 class Tenant extends CommonModel
 {
@@ -46,9 +48,15 @@ class Tenant extends CommonModel
     {
         static::creating(static function (self $tenant): void {
             $tenant->invoice_prefix ??= strtoupper((string) $tenant->slug);
+            // Die Parent Group ist Pflicht; ohne Angabe landet der Mandant bei „Ohne Zuordnung".
+            $tenant->parent_group_id ??= ParentGroup::fallback()->id;
         });
     }
 
+    public function parentGroup() : BelongsTo {
+        return $this->belongsTo(ParentGroup::class, 'parent_group_id');
+    }
+
     public static function getTempDirectory() : string {
         return currentTenant()->slug . '/temp-data/';
     }
@@ -95,6 +103,7 @@ class Tenant extends CommonModel
         'tax_number',
         'vat_id',
         'invoice_prefix',
+        'parent_group_id',
     ];
 
     protected $casts = [
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 7a8c57f..b059ad8 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -2,6 +2,7 @@
 
 namespace App\Providers;
 
+use App\Repositories\GlobalSettingRepository;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\ServiceProvider;
 
@@ -12,7 +13,8 @@ class AppServiceProvider extends ServiceProvider
      */
     public function register(): void
     {
-        //
+        // Eine Instanz je Request, damit die Einstellungen nur einmal gelesen werden.
+        $this->app->scoped(GlobalSettingRepository::class);
     }
 
     /**
diff --git a/app/Providers/GlobalDataProvider.php b/app/Providers/GlobalDataProvider.php
index bca41b2..74c967b 100644
--- a/app/Providers/GlobalDataProvider.php
+++ b/app/Providers/GlobalDataProvider.php
@@ -4,6 +4,7 @@ namespace App\Providers;
 
 use App\Enumerations\EatingHabit;
 use App\Enumerations\InvoiceType;
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\RefundReason;
 use App\Enumerations\RetentionReason;
 use App\Enumerations\TravelReason;
@@ -45,6 +46,8 @@ class GlobalDataProvider {
             'currentEvent' => $this->getCurrentEventData(),
             'canAccessAdmin' => $canAccessAdmin,
             'isMainAdmin' => $isMainAdmin,
+            // Bezeichnungen der Gruppen-Ebenen (z. B. Stamm/Stämme, Bund/Bünde) aus den globalen Einstellungen.
+            'groupLabels' => ParticipantGroupType::labels(),
         ]);
     }
 
@@ -222,6 +225,8 @@ class GlobalDataProvider {
             [
                 'localGroups' => Tenant::where(['is_active_local_group' => true])->get(),
                 'eatingHabits' => EatingHabit::all(),
+                'participantGroupTypes' => ParticipantGroupType::options(),
+                'localGroupLabelPlural' => ParticipantGroupType::LocalGroup->pluralLabel(),
                 'paymentMethods' => AvailablePaymentMethod::where('active', true)->get()
                     ->map(fn (AvailablePaymentMethod $method) => new AvailablePaymentMethodResource($method)->toArray($request)),
             ]);
diff --git a/app/Repositories/EventParticipantRepository.php b/app/Repositories/EventParticipantRepository.php
index 9b71078..a0436b3 100644
--- a/app/Repositories/EventParticipantRepository.php
+++ b/app/Repositories/EventParticipantRepository.php
@@ -73,12 +73,18 @@ class EventParticipantRepository {
             ->first();
     }
 
-    public function groupByLocalGroup(Event $event, Request $request, ?string $filter = null) : array {
+    /** Ob es zur Veranstaltung schon Anmeldungen gibt -- abgemeldete eingeschlossen. */
+    public function existsForEvent(Event $event) : bool {
+        return EventParticipant::where('event_id', $event->id)->exists();
+    }
+
+    /** Gruppiert nach der bei der Anmeldung gewählten Gruppe (Local oder Parent Group, je nach Veranstaltung). */
+    public function groupByParticipantGroup(Event $event, Request $request, ?string $filter = null) : array {
         $allParticipants = $this->getForList($event, $request);
         $participants = [];
         foreach ($allParticipants as $participant) {
-            if ($filter === null || $participant['localgroup'] === $filter) {
-                $participants[$participant['localgroup']][] = $participant;
+            if ($filter === null || $participant['participantGroup'] === $filter) {
+                $participants[$participant['participantGroup']][] = $participant;
             }
         }
 
diff --git a/app/Repositories/GlobalSettingRepository.php b/app/Repositories/GlobalSettingRepository.php
new file mode 100644
index 0000000..d14ae5e
--- /dev/null
+++ b/app/Repositories/GlobalSettingRepository.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Repositories;
+
+use App\Models\GlobalSetting;
+
+/**
+ * Zugriff auf die app-weiten Einstellungen. Im Container als `scoped` registriert -- über
+ * `app(GlobalSettingRepository::class)` beziehen, dann werden die Werte nur einmal pro Request gelesen
+ * (die Bezeichnungen werden je Teili-Zeile einer Liste gebraucht).
+ */
+class GlobalSettingRepository {
+    /** @var array<string, string>|null */
+    private ?array $values = null;
+
+    public function get(string $key, string $default) : string {
+        $value = $this->all()[$key] ?? null;
+
+        return ($value === null || trim($value) === '') ? $default : $value;
+    }
+
+    /** @param array<string, string> $values */
+    public function setMany(array $values) : void {
+        foreach ($values as $key => $value) {
+            GlobalSetting::updateOrCreate(['key' => $key], ['value' => $value]);
+        }
+
+        $this->values = null;
+    }
+
+    /** @return array<string, string> */
+    private function all() : array {
+        return $this->values ??= GlobalSetting::pluck('value', 'key')->all();
+    }
+}
diff --git a/app/Resources/EventParticipantResource.php b/app/Resources/EventParticipantResource.php
index 83c6b24..141415b 100644
--- a/app/Resources/EventParticipantResource.php
+++ b/app/Resources/EventParticipantResource.php
@@ -51,7 +51,12 @@ class EventParticipantResource extends JsonResource
                 'unregisteredAt' => $this->resource->unregistered_at?->format('d.m.Y'),
                 'fullname' => $this->resource->getFullName(),
                 'age' => new Age($this->resource->birthday)->getAge(),
-                'localgroup' => $this->resource->localGroup()?->first()?->name ?? 'Nicht im LV',
+                // Die bei der Anmeldung gewählte Gruppe: Local Group oder Parent Group, je nach Veranstaltung.
+                'participantGroup' => $this->resource->participantGroupName($event),
+                // Wert für die Auswahl in der Verwaltung: Slug der Local Group bzw. ID der Parent Group.
+                'participantGroupValue' => $event->asksForParentGroup()
+                    ? ($this->resource->parent_group_id !== null ? (string) $this->resource->parent_group_id : '')
+                    : ($this->resource->local_group ?? ''),
                 // Die Zuordnungen sind nullable: die Kurzanmeldung erhebt nicht alles, und in der Verwaltung
                 // lassen sich Werte leeren. Ohne Fallback fielen Teilnehmerliste und Detailansicht komplett aus.
                 'swimmingPermission' => $this->resource->swimmingPermission()->first()?->short ?? 'Unbekannt',
diff --git a/app/Resources/EventResource.php b/app/Resources/EventResource.php
index 4f22fc7..ba565fd 100644
--- a/app/Resources/EventResource.php
+++ b/app/Resources/EventResource.php
@@ -6,6 +6,7 @@ use App\Enumerations\ParticipationFeeType;
 use App\Enumerations\ParticipationType;
 use App\Enumerations\VatPricingMode;
 use App\Models\Event;
+use App\Models\ParentGroup;
 use App\Support\DateRange;
 use App\ValueObjects\Amount;
 use DateTime;
@@ -149,6 +150,19 @@ class EventResource extends JsonResource{
         $returnArray['contributingLocalGroups'] = $this->event->localGroups
             ->map(fn ($localGroup) => new LocalGroupResource($localGroup)->toArray($request))
             ->toArray();
+        // Wonach bei der Anmeldung gefragt wird (Local oder Parent Group), mit Bezeichnung und Auswahl.
+        // `id` wird bei der Anmeldung übermittelt, `value` ist der in der Verwaltung gepflegte Wert
+        // (Slug der Local Group bzw. ID der Parent Group).
+        $returnArray['participantGroupType'] = $this->event->participantGroupType()->value;
+        $returnArray['participantGroupLabel'] = $this->event->participantGroupType()->label();
+        $returnArray['participantGroupOptions'] = $this->event->participantGroupOptions()
+            ->map(fn ($group) => [
+                'id' => $group->id,
+                'name' => $group->name,
+                'value' => $group instanceof ParentGroup ? (string) $group->id : $group->slug,
+            ])
+            ->values()
+            ->toArray();
 
         $returnArray['eatingHabits'] = $this->event->eatingHabits()->get()->map(
             fn($eatingHabit) => new EatingHabitResource($eatingHabit))->toArray();
diff --git a/app/Scopes/CommonController.php b/app/Scopes/CommonController.php
index 58c87a6..78efa9c 100644
--- a/app/Scopes/CommonController.php
+++ b/app/Scopes/CommonController.php
@@ -2,6 +2,7 @@
 
 namespace App\Scopes;
 
+use App\Domains\Admin\Repositories\AdminParentGroupRepository;
 use App\Domains\Admin\Repositories\AdminTenantRepository;
 use App\Domains\Admin\Repositories\AdminUserRepository;
 use App\Models\Tenant;
@@ -10,6 +11,7 @@ use App\Repositories\CostUnitRepository;
 use App\Repositories\EstimatesRepository;
 use App\Repositories\EventParticipantRepository;
 use App\Repositories\EventRepository;
+use App\Repositories\GlobalSettingRepository;
 use App\Repositories\InvoiceRepository;
 use App\Repositories\PageTextRepository;
 use App\Repositories\ParticipantRefundRepository;
@@ -31,6 +33,8 @@ abstract class CommonController {
     protected PaymentMethodRepository $paymentMethods;
     protected AdminUserRepository $adminUsers;
     protected AdminTenantRepository $adminTenants;
+    protected AdminParentGroupRepository $adminParentGroups;
+    protected GlobalSettingRepository $globalSettings;
 
     public function __construct() {
         $this->tenant = currentTenant();
@@ -45,6 +49,8 @@ abstract class CommonController {
         $this->paymentMethods = new PaymentMethodRepository();
         $this->adminUsers = new AdminUserRepository();
         $this->adminTenants = new AdminTenantRepository();
+        $this->adminParentGroups = new AdminParentGroupRepository();
+        $this->globalSettings = app(GlobalSettingRepository::class);
     }
 
     protected function checkAuth() {
diff --git a/database/migrations/2026_09_29_140010_create_parent_groups.php b/database/migrations/2026_09_29_140010_create_parent_groups.php
new file mode 100644
index 0000000..4f5f099
--- /dev/null
+++ b/database/migrations/2026_09_29_140010_create_parent_groups.php
@@ -0,0 +1,102 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Übergeordnete Gruppen (Parent Groups, im UI z. B. „Bund"): jeder Mandant (Local Group) gehört zu genau einer.
+     * Eine Veranstaltung fragt bei der Anmeldung entweder nach der Local Group oder nach der Parent Group.
+     *
+     * Die Vorbelegung steht hier und nicht im Seeder: der Fremdschlüssel am Tenant ist Pflicht, bestehende
+     * Installationen brauchen die Fallback-Gruppe also schon beim Migrieren.
+     *
+     * Dazu die globalen Einstellungen mit den Bezeichnungen der beiden Ebenen -- aus demselben Grund vorbelegt.
+     */
+    public function up(): void
+    {
+        Schema::create('parent_groups', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            // Die Gruppe für Mandanten ohne Zuordnung; sie ist umbenennbar, aber nie löschbar.
+            $table->boolean('is_fallback')->default(false);
+            $table->timestamps();
+        });
+
+        $now = now();
+        $fallbackId = DB::table('parent_groups')->insertGetId([
+            'name' => 'Ohne Zuordnung',
+            'is_fallback' => true,
+            'created_at' => $now,
+            'updated_at' => $now,
+        ]);
+
+        foreach (['BdP', 'DPV', 'DPSG', 'VCP'] as $name) {
+            DB::table('parent_groups')->insert([
+                'name' => $name,
+                'is_fallback' => false,
+                'created_at' => $now,
+                'updated_at' => $now,
+            ]);
+        }
+
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->foreignId('parent_group_id')->nullable()->constrained('parent_groups')->restrictOnDelete();
+        });
+
+        DB::table('tenants')->update(['parent_group_id' => $fallbackId]);
+
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->foreignId('parent_group_id')->nullable(false)->change();
+        });
+
+        Schema::table('events', function (Blueprint $table) {
+            $table->string('participant_group_type')->default('local_group');
+        });
+
+        Schema::table('event_participants', function (Blueprint $table) {
+            $table->foreignId('parent_group_id')->nullable()->constrained('parent_groups')->restrictOnDelete();
+        });
+
+        Schema::create('global_settings', function (Blueprint $table) {
+            $table->string('key')->primary();
+            $table->text('value');
+            $table->timestamps();
+        });
+
+        foreach ([
+            'local_group_label' => 'Stamm',
+            'local_group_label_plural' => 'Stämme',
+            'parent_group_label' => 'Bund',
+            'parent_group_label_plural' => 'Bünde',
+        ] as $key => $value) {
+            DB::table('global_settings')->insert([
+                'key' => $key,
+                'value' => $value,
+                'created_at' => $now,
+                'updated_at' => $now,
+            ]);
+        }
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('global_settings');
+
+        Schema::table('event_participants', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('parent_group_id');
+        });
+
+        Schema::table('events', function (Blueprint $table) {
+            $table->dropColumn('participant_group_type');
+        });
+
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('parent_group_id');
+        });
+
+        Schema::dropIfExists('parent_groups');
+    }
+};
diff --git a/resources/js/layouts/AdminAppLayout.vue b/resources/js/layouts/AdminAppLayout.vue
index 0734222..c2e24e9 100644
--- a/resources/js/layouts/AdminAppLayout.vue
+++ b/resources/js/layouts/AdminAppLayout.vue
@@ -15,6 +15,7 @@ const globalProps = reactive({
     message: '',
     currentEvent: null,
     version: '',
+    groupLabels: {localGroupPlural: 'Stämme', parentGroupPlural: 'Bünde'},
 });
 
 const sidebarOpen = ref(false);
@@ -107,7 +108,10 @@ const props = defineProps({
                         </ul>
                         <ul class="nav-links">
                             <li v-if="globalProps.tenant.slug === 'lv'">
-                                <a href="/admin/tenants" @click="closeSidebar">Stämme</a>
+                                <a href="/admin/tenants" @click="closeSidebar">{{ globalProps.groupLabels.localGroupPlural }}</a>
+                            </li>
+                            <li v-if="globalProps.tenant.slug === 'lv'">
+                                <a href="/admin/parent-groups" @click="closeSidebar">{{ globalProps.groupLabels.parentGroupPlural }}</a>
                             </li>
                             <li>
                                 <a href="/admin/users" @click="closeSidebar">Benutzer*innen</a>
@@ -117,6 +121,9 @@ const props = defineProps({
                             <li>
                                 <a href="/admin/document-templates" @click="closeSidebar">Rechnungsvorlage</a>
                             </li>
+                            <li>
+                                <a href="/admin/settings" @click="closeSidebar">Einstellungen</a>
+                            </li>
                         </ul>
                     </nav>
                 </div>
diff --git a/resources/views/csvs/participant-list.blade.php b/resources/views/csvs/participant-list.blade.php
index 0da84b2..7489a60 100644
--- a/resources/views/csvs/participant-list.blade.php
+++ b/resources/views/csvs/participant-list.blade.php
@@ -1,10 +1,12 @@
 @php
     $rows = $rows ?? [];
+    $localGroupLabel = $localGroupLabel ?? 'Stamm';
+    $participantGroupLabel = $participantGroupLabel ?? $localGroupLabel;
 @endphp
 
-"Name", "Vorname", "Geburtsdatum", "Postleitzahl (Privat), "Wohnort (Privat)", "Bundesland (Privat)", "Alter",  "Postleitzahl (Stamm)",  "Wohnort (Stamm)", "Bundesland (Stamm)","Stamm", "Teilnahmegruppe", "Anreise", "Abreise", "Beitrag gezahlt", "Beitrag"
+"Name", "Vorname", "Geburtsdatum", "Postleitzahl (Privat)", "Wohnort (Privat)", "Bundesland (Privat)", "Alter",  "Postleitzahl ({{ $localGroupLabel }})",  "Wohnort ({{ $localGroupLabel }})", "Bundesland ({{ $localGroupLabel }})","{{ $participantGroupLabel }}", "Teilnahmegruppe", "Anreise", "Abreise", "Beitrag gezahlt", "Beitrag"
 @foreach($rows as $index => $row)
-"{{ $row['lastname']}}","{{ $row['firstname'] }}","{{ $row['birthday'] }}","{{ $row['postcode'] }}","{{ $row['city'] }}","{{ $row['state'] }}","{{ $row['age'] }}","{{ $row['localGroupPostcode'] }}","{{ $row['localGroupCity'] }}","{{ $row['localGroupState'] }}","{{ $row['localgroup'] }}","{{ $row['participationType'] }}","{{ $row['arrival'] }}","{{ $row['departure'] }}","{{ $row['amountPaid']['readable'] }}","{{ $row['amountExpected']['readable'] }}"
+"{{ $row['lastname']}}","{{ $row['firstname'] }}","{{ $row['birthday'] }}","{{ $row['postcode'] }}","{{ $row['city'] }}","{{ $row['state'] }}","{{ $row['age'] }}","{{ $row['localGroupPostcode'] }}","{{ $row['localGroupCity'] }}","{{ $row['localGroupState'] }}","{{ $row['participantGroup'] }}","{{ $row['participationType'] }}","{{ $row['arrival'] }}","{{ $row['departure'] }}","{{ $row['amountPaid']['readable'] }}","{{ $row['amountExpected']['readable'] }}"
 @endforeach
 
 
diff --git a/resources/views/pdfs/amount-list.blade.php b/resources/views/pdfs/amount-list.blade.php
index 66f4d72..ed0cbd7 100644
--- a/resources/views/pdfs/amount-list.blade.php
+++ b/resources/views/pdfs/amount-list.blade.php
@@ -50,7 +50,7 @@
             <thead>
             <tr>
                 <th style="width: 2cm;">Name, Alter</th>
-                <th style="width: 2cm;">Stamm</th>
+                <th style="width: 2cm;">{{ $participantGroupLabel ?? 'Stamm' }}</th>
                 <th style="width: 2.5cm;">Teilnahmegruppe</th>
                 <th style="width: 3.5cm;">Anreise<br />Abreise</th>
                 <th style="width: 3.5cm;">Beitrag</th>
@@ -61,7 +61,7 @@
             @foreach($chunk as $index => $row)
                 <tr>
                     <td>{{ $row['lastname']}},<br />{{ $row['firstname'] }}<br /> {{$row['age'] ?? ''}} Jahre</td>
-                    <td>{{ $row['localgroup'] ?? '' }}</td>
+                    <td>{{ $row['participantGroup'] ?? '' }}</td>
                     <td>{{ $row['participationType'] ?? '' }}</td>
                     <td>{{ $row['arrival'] ?? '' }}<br />{{$row['departure']}}<br />{{$row['presenceDays']['real']}} Tage</td>
                     <td>{{ $row['amountPaid']['readable'] ?? '' }} / {{ $row['amountExpected']['readable'] ?? '' }}</td>
diff --git a/resources/views/pdfs/drinking-list.blade.php b/resources/views/pdfs/drinking-list.blade.php
index 7764387..95709bb 100644
--- a/resources/views/pdfs/drinking-list.blade.php
+++ b/resources/views/pdfs/drinking-list.blade.php
@@ -50,7 +50,7 @@
             <thead>
             <tr>
                 <th style="width: 2cm;">Name, Alter</th>
-                <th style="width: 2cm;">Stamm</th>
+                <th style="width: 2cm;">{{ $participantGroupLabel ?? 'Stamm' }}</th>
                 <th style="width: 3cm;">Softdrinks 1</th>
                 <th style="width: 3cm;">Softdrinks 2</th>
                 <th style="width: 3cm;">Softdrinks 3</th>
@@ -63,7 +63,7 @@
             @foreach($chunk as $index => $row)
                 <tr>
                     <td>{{ $row['lastname']}},<br />{{ $row['firstname'] }}<br /> {{$row['age'] ?? ''}} Jahre</td>
-                    <td>{{ $row['localgroup'] ?? '' }}</td>
+                    <td>{{ $row['participantGroup'] ?? '' }}</td>
                     <td></td>
                     <td></td>
                     <td></td>
diff --git a/resources/views/pdfs/first-aid-list.blade.php b/resources/views/pdfs/first-aid-list.blade.php
index 13d4100..c3690ff 100644
--- a/resources/views/pdfs/first-aid-list.blade.php
+++ b/resources/views/pdfs/first-aid-list.blade.php
@@ -50,7 +50,7 @@
             <thead>
             <tr>
                 <th style="width: 2cm;">Name, Alter</th>
-                <th style="width: 2cm;">Stamm</th>
+                <th style="width: 2cm;">{{ $participantGroupLabel ?? 'Stamm' }}</th>
                 <th style="width: 2.5cm;">Bade-Erlaubnis</th>
                 <th style="width: 3.5cm;">Allergien /<br />Unvertr.</th>
                 <th style="width: 3.5cm;">Medikamente</th>
@@ -63,7 +63,7 @@
             @foreach($chunk as $index => $row)
                 <tr>
                     <td>{{ $row['lastname']}},<br />{{ $row['firstname'] }}<br /> {{$row['age'] ?? ''}} Jahre</td>
-                    <td>{{ $row['localgroup'] ?? '' }}</td>
+                    <td>{{ $row['participantGroup'] ?? '' }}</td>
                     <td>{{ $row['swimmingPermission'] ?? '' }}</td>
                     <td>{{ $row['allergies'] ?? '' }}<br />{{$row['intolerances']}}</td>
                     <td>{{ $row['medications'] ?? '' }}</td>
diff --git a/resources/views/pdfs/kitchen-list.blade.php b/resources/views/pdfs/kitchen-list.blade.php
index 3b3bd81..f667d26 100644
--- a/resources/views/pdfs/kitchen-list.blade.php
+++ b/resources/views/pdfs/kitchen-list.blade.php
@@ -99,7 +99,7 @@
         <thead>
         <tr>
             <th style="width: 2cm;">Name, Alter</th>
-            <th style="width: 2cm;">Stamm</th>
+            <th style="width: 2cm;">{{ $participantGroupLabel ?? 'Stamm' }}</th>
             <th style="width: 2.5cm;">Teilnahmegruppe</th>
             <th style="width: 3.5cm;">Anreise<br/>Abreise</th>
             <th style="width: 3.5cm;">Unverträglichkeiten</th>
@@ -110,7 +110,7 @@
         @foreach($chunk as $index => $row)
             <tr>
                 <td>{{ $row['lastname']}},<br/>{{ $row['firstname'] }}<br/> {{$row['age'] ?? ''}} Jahre</td>
-                <td>{{ $row['localgroup'] ?? '' }}</td>
+                <td>{{ $row['participantGroup'] ?? '' }}</td>
                 <td>{{ $row['participationType'] ?? '' }}</td>
                 <td>{{ $row['arrival'] ?? '' }}<br/>{{$row['departure']}}<br/>{{$row['presenceDays']['real']}} Tage</td>
                 <td>{{ $row['intolerances'] }}</td>
diff --git a/resources/views/pdfs/photo-permission-list.blade.php b/resources/views/pdfs/photo-permission-list.blade.php
index 3e4947b..d2d97b1 100644
--- a/resources/views/pdfs/photo-permission-list.blade.php
+++ b/resources/views/pdfs/photo-permission-list.blade.php
@@ -50,7 +50,7 @@
             <thead>
             <tr>
                 <th style="width: 2cm;">Name, Alter</th>
-                <th style="width: 2cm;">Stamm</th>
+                <th style="width: 2cm;">{{ $participantGroupLabel ?? 'Stamm' }}</th>
                 <th style="width: 3.0cm;">Anreise<br />Abreise</th>
                 <th style="width: 3.0cm;">Fotos<br />Printmedien</th>
                 <th style="width: 3.0cm;">Fotos<br />Webseite</th>
@@ -64,7 +64,7 @@
             @foreach($chunk as $index => $row)
                 <tr>
                     <td>{{ $row['lastname']}},<br />{{ $row['firstname'] }}<br /> {{$row['age'] ?? ''}} Jahre</td>
-                    <td>{{ $row['localgroup'] ?? '' }}</td>
+                    <td>{{ $row['participantGroup'] ?? '' }}</td>
                     <td>{{ $row['arrival'] ?? '' }}<br />{{$row['departure']}}<br />{{$row['presenceDays']['real']}} Tage</td>
                     <td style="text-align:center; vertical-align: middle; font-weight: bold;">{{ $row['foto_print'] ? 'Ja' : 'Nein' }}</td>
                     <td style="text-align:center; vertical-align: middle; font-weight: bold;">{{ $row['foto_webseite'] ? 'Ja' : 'Nein' }}</td>
diff --git a/tests/Feature/ParentGroupTest.php b/tests/Feature/ParentGroupTest.php
new file mode 100644
index 0000000..12ef485
--- /dev/null
+++ b/tests/Feature/ParentGroupTest.php
@@ -0,0 +1,307 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Domains\Admin\Actions\CreateParentGroup\CreateParentGroupAction;
+use App\Domains\Admin\Actions\CreateParentGroup\CreateParentGroupRequest;
+use App\Domains\Admin\Actions\DeleteParentGroup\DeleteParentGroupAction;
+use App\Domains\Admin\Actions\DeleteParentGroup\DeleteParentGroupRequest;
+use App\Domains\Admin\Actions\RenameParentGroup\RenameParentGroupAction;
+use App\Domains\Admin\Actions\RenameParentGroup\RenameParentGroupRequest;
+use App\Domains\Admin\Actions\UpdateGlobalSettings\UpdateGlobalSettingsAction;
+use App\Domains\Admin\Actions\UpdateGlobalSettings\UpdateGlobalSettingsRequest;
+use App\Domains\Admin\Repositories\AdminParentGroupRepository;
+use App\Domains\Event\Actions\CreateEvent\CreateEventCommand;
+use App\Domains\Event\Actions\CreateEvent\CreateEventRequest;
+use App\Domains\Event\Actions\UpdateEvent\UpdateEventCommand;
+use App\Domains\Event\Actions\UpdateEvent\UpdateEventRequest;
+use App\Enumerations\CostUnitType;
+use App\Enumerations\EatingHabit;
+use App\Enumerations\EfzStatus;
+use App\Enumerations\FirstAidPermission;
+use App\Enumerations\SwimmingPermission;
+use App\Enumerations\ParticipantGroupType;
+use App\Enumerations\ParticipationFeeType;
+use App\Models\Event;
+use App\Models\ParentGroup;
+use App\Models\Tenant;
+use App\Repositories\GlobalSettingRepository;
+use App\ValueObjects\Amount;
+use DateTime;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\DB;
+use Tests\TestCase;
+
+class ParentGroupTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private Tenant $tenant;
+    private AdminParentGroupRepository $repository;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->tenant = $this->createTenant('tv', 'Test');
+        app()->instance('tenant', $this->tenant);
+
+        DB::table('cost_unit_types')->insert(['slug' => CostUnitType::COST_UNIT_TYPE_EVENT, 'name' => 'Veranstaltung']);
+        DB::table('participation_types')->insert(['slug' => 'participant', 'name' => 'Teilnehmer']);
+        DB::table('participation_fee_types')->insert(['slug' => 'fixed', 'name' => 'Fix']);
+        EatingHabit::create(['slug' => EatingHabit::EATING_HABIT_VEGAN, 'name' => 'Vegan']);
+        EatingHabit::create(['slug' => EatingHabit::EATING_HABIT_VEGETARIAN, 'name' => 'Vegetarisch']);
+
+        $this->repository = new AdminParentGroupRepository();
+    }
+
+    private function createTenant(string $slug, string $name, ?ParentGroup $parentGroup = null): Tenant
+    {
+        return Tenant::create([
+            'slug' => $slug, 'name' => $name, 'email' => $slug . '@example.com',
+            'email_finance' => $slug . '-f@example.com', 'url' => $slug . '.local',
+            'account_name' => $name, 'account_iban' => 'DE00', 'account_bic' => 'XY',
+            'city' => 'Stadt', 'postcode' => '00000', 'is_active_local_group' => true,
+            'has_active_instance' => true, 'tax_liable' => false, 'vat_rate' => 0, 'vat_pricing_mode' => 'inclusive',
+            'parent_group_id' => $parentGroup?->id,
+        ]);
+    }
+
+    private function parentGroup(string $name): ParentGroup
+    {
+        return ParentGroup::where('name', $name)->firstOrFail();
+    }
+
+    private function createEvent(ParticipantGroupType $type = ParticipantGroupType::LocalGroup): Event
+    {
+        $response = new CreateEventCommand(new CreateEventRequest(
+            name: 'Sommerlager',
+            location: 'Leipzig',
+            postalCode: '04103',
+            email: 'e@example.com',
+            begin: new DateTime('2026-09-01'),
+            end: new DateTime('2026-09-05'),
+            earlyBirdEnd: new DateTime('2026-08-20'),
+            registrationFinalEnd: new DateTime('2026-08-25'),
+            earlyBirdEndAmountIncrease: 0,
+            participationFeeType: ParticipationFeeType::where('slug', 'fixed')->first(),
+            accountOwner: 'Owner',
+            accountIban: 'DE00',
+            payPerDay: false,
+            participantGroupType: $type,
+        ))->execute();
+
+        $this->assertTrue($response->success);
+
+        return $response->event->fresh();
+    }
+
+    private function updateGroupType(Event $event, ParticipantGroupType $type): Event
+    {
+        new UpdateEventCommand(new UpdateEventRequest(
+            $event, $event->name, $event->location, $event->postal_code, $event->email,
+            new DateTime('2026-08-20'), new DateTime('2026-08-25'), 16, true, true,
+            Amount::fromString('0,00'), Amount::fromString('0,00'),
+            $event->localGroups->pluck('id')->all(), [],
+            participantGroupType: $type,
+        ))->execute();
+
+        return $event->fresh();
+    }
+
+    // --- Vorbelegung und Tenant --------------------------------------------------------------------------
+
+    public function test_vorbelegung_ist_vorhanden(): void
+    {
+        $this->assertEqualsCanonicalizing(
+            ['Ohne Zuordnung', 'BdP', 'DPV', 'DPSG', 'VCP'],
+            ParentGroup::pluck('name')->all(),
+        );
+        $this->assertSame('Ohne Zuordnung', ParentGroup::fallback()->name);
+    }
+
+    public function test_neuer_tenant_ohne_angabe_landet_bei_ohne_zuordnung(): void
+    {
+        $this->assertSame(ParentGroup::fallback()->id, $this->tenant->fresh()->parent_group_id);
+    }
+
+    // --- Verwaltung ----------------------------------------------------------------------------------------
+
+    public function test_anlegen_und_umbenennen(): void
+    {
+        $created = new CreateParentGroupAction(new CreateParentGroupRequest('  Pfadfinderbund  '))->execute();
+        $this->assertTrue($created->success);
+        $this->assertSame('Pfadfinderbund', $created->parentGroup->name);
+
+        $renamed = new RenameParentGroupAction(new RenameParentGroupRequest($created->parentGroup, 'Neuer Name'))->execute();
+        $this->assertTrue($renamed->success);
+        $this->assertSame('Neuer Name', $created->parentGroup->fresh()->name);
+    }
+
+    public function test_leerer_name_wird_abgelehnt(): void
+    {
+        $this->assertFalse(new CreateParentGroupAction(new CreateParentGroupRequest('   '))->execute()->success);
+        $this->assertFalse(
+            new RenameParentGroupAction(new RenameParentGroupRequest($this->parentGroup('BdP'), ''))->execute()->success
+        );
+        $this->assertSame('BdP', $this->parentGroup('BdP')->name);
+    }
+
+    public function test_unbenutzte_gruppe_ist_loeschbar(): void
+    {
+        $dpv = $this->parentGroup('DPV');
+
+        $response = new DeleteParentGroupAction(new DeleteParentGroupRequest($dpv, $this->repository->isInUse($dpv)))->execute();
+
+        $this->assertTrue($response->success);
+        $this->assertNull(ParentGroup::find($dpv->id));
+    }
+
+    public function test_zugeordnete_gruppe_ist_nicht_loeschbar(): void
+    {
+        $bdp = $this->parentGroup('BdP');
+        $this->createTenant('stamm-a', 'Stamm A', $bdp);
+
+        $this->assertTrue($this->repository->isInUse($bdp));
+
+        $response = new DeleteParentGroupAction(new DeleteParentGroupRequest($bdp, $this->repository->isInUse($bdp)))->execute();
+
+        $this->assertFalse($response->success);
+        $this->assertNotNull(ParentGroup::find($bdp->id));
+    }
+
+    public function test_fallback_ist_nie_loeschbar(): void
+    {
+        $fallback = ParentGroup::fallback();
+
+        $response = new DeleteParentGroupAction(new DeleteParentGroupRequest($fallback, false))->execute();
+
+        $this->assertFalse($response->success);
+        $this->assertNotNull(ParentGroup::find($fallback->id));
+    }
+
+    // --- Bezeichnungen -------------------------------------------------------------------------------------
+
+    public function test_bezeichnungen_haben_vorgaben(): void
+    {
+        $this->assertSame(
+            ['localGroup' => 'Stamm', 'localGroupPlural' => 'Stämme', 'parentGroup' => 'Bund', 'parentGroupPlural' => 'Bünde'],
+            ParticipantGroupType::labels(),
+        );
+    }
+
+    public function test_geaenderte_bezeichnung_wirkt_auf_enum_und_event(): void
+    {
+        $response = new UpdateGlobalSettingsAction(new UpdateGlobalSettingsRequest(
+            app(GlobalSettingRepository::class), 'Ortsgruppe', 'Ortsgruppen', 'Verband', 'Verbände',
+        ))->execute();
+
+        $this->assertTrue($response->success);
+        $this->assertSame('Verband', ParticipantGroupType::ParentGroup->label());
+        $this->assertSame('Ortsgruppen', ParticipantGroupType::LocalGroup->pluralLabel());
+    }
+
+    public function test_leere_bezeichnung_wird_abgelehnt(): void
+    {
+        $response = new UpdateGlobalSettingsAction(new UpdateGlobalSettingsRequest(
+            app(GlobalSettingRepository::class), 'Ortsgruppe', '', 'Verband', 'Verbände',
+        ))->execute();
+
+        $this->assertFalse($response->success);
+        $this->assertSame('Stamm', ParticipantGroupType::LocalGroup->label());
+    }
+
+    public function test_fehlende_einstellung_faellt_auf_vorgabe_zurueck(): void
+    {
+        DB::table('global_settings')->delete();
+
+        $this->assertSame('Bund', app(GlobalSettingRepository::class)->get('parent_group_label', 'Bund'));
+        $this->assertSame('Stämme', ParticipantGroupType::LocalGroup->pluralLabel());
+    }
+
+    // --- Event -------------------------------------------------------------------------------------------
+
+    public function test_anlage_speichert_abfrage_nach_bund(): void
+    {
+        $this->assertSame('parent_group', $this->createEvent(ParticipantGroupType::ParentGroup)->participant_group_type);
+        $this->assertSame('local_group', $this->createEvent()->participant_group_type);
+    }
+
+    public function test_optionen_sind_die_buende_der_teilnehmenden_staemme(): void
+    {
+        $event = $this->createEvent(ParticipantGroupType::ParentGroup);
+        $event->localGroups()->sync([
+            $this->createTenant('stamm-a', 'Stamm A', $this->parentGroup('VCP'))->id,
+            $this->createTenant('stamm-b', 'Stamm B', $this->parentGroup('BdP'))->id,
+            $this->createTenant('stamm-c', 'Stamm C', $this->parentGroup('BdP'))->id,
+        ]);
+
+        // Jeder Bund nur einmal, alphabetisch.
+        $this->assertSame(['BdP', 'VCP'], $event->participantGroupOptions()->pluck('name')->all());
+    }
+
+    public function test_optionen_listen_ohne_zuordnung_zuletzt(): void
+    {
+        $event = $this->createEvent(ParticipantGroupType::ParentGroup);
+        $event->localGroups()->sync([
+            $this->createTenant('stamm-a', 'Stamm A', $this->parentGroup('VCP'))->id,
+            $this->createTenant('stamm-b', 'Stamm B', ParentGroup::fallback())->id,
+            $this->createTenant('stamm-c', 'Stamm C', $this->parentGroup('BdP'))->id,
+        ]);
+
+        $this->assertSame(['BdP', 'VCP', 'Ohne Zuordnung'], $event->participantGroupOptions()->pluck('name')->all());
+    }
+
+    public function test_verwaltung_listet_alphabetisch_mit_ohne_zuordnung_zuletzt(): void
+    {
+        new CreateParentGroupAction(new CreateParentGroupRequest('Pfadfinderbund'))->execute();
+
+        $this->assertSame(
+            ['BdP', 'DPSG', 'DPV', 'Pfadfinderbund', 'VCP', 'Ohne Zuordnung'],
+            $this->repository->all()->pluck('name')->all(),
+        );
+    }
+
+    public function test_optionen_sind_bei_stamm_abfrage_die_staemme(): void
+    {
+        $event = $this->createEvent();
+        $event->localGroups()->sync([$this->createTenant('stamm-a', 'Stamm A', $this->parentGroup('BdP'))->id]);
+
+        $this->assertSame(['Stamm A'], $event->participantGroupOptions()->pluck('name')->all());
+    }
+
+    public function test_umstellen_ist_ohne_anmeldungen_moeglich(): void
+    {
+        $event = $this->updateGroupType($this->createEvent(), ParticipantGroupType::ParentGroup);
+
+        $this->assertSame('parent_group', $event->participant_group_type);
+    }
+
+    public function test_umstellen_ist_nach_der_ersten_anmeldung_gesperrt(): void
+    {
+        $event = $this->createEvent();
+
+        // Eine Anmeldung genügt -- direkt geschrieben, der Anmeldeprozess ist hier nicht Gegenstand.
+        EfzStatus::create(['slug' => EfzStatus::EFZ_STATUS_NOT_REQUIRED, 'name' => 'Nicht erforderlich']);
+        SwimmingPermission::create(['slug' => SwimmingPermission::SWIMMING_PERMISSION_ALLOWED, 'name' => 'Darf baden', 'short' => 'Erteilt']);
+        FirstAidPermission::create(['slug' => FirstAidPermission::FIRST_AID_PERMISSION_ALLOWED, 'name' => 'Zugestimmt', 'description' => '']);
+
+        DB::table('event_participants')->insert([
+            'efz_status' => EfzStatus::EFZ_STATUS_NOT_REQUIRED,
+            'swimming_permission' => SwimmingPermission::SWIMMING_PERMISSION_ALLOWED,
+            'first_aid_permission' => FirstAidPermission::FIRST_AID_PERMISSION_ALLOWED,
+            'tenant' => $this->tenant->slug, 'event_id' => $event->id, 'identifier' => 'p-1',
+            'firstname' => 'Hans', 'lastname' => 'Muster', 'participation_type' => 'participant',
+            'birthday' => '2000-01-01', 'address_1' => 'Weg 1', 'postcode' => '04103', 'city' => 'Leipzig',
+            'email_1' => 'h@example.com', 'phone_1' => '123', 'payment_purpose' => 'Beitrag',
+            'eating_habit' => EatingHabit::EATING_HABIT_VEGAN,
+            'arrival_date' => '2026-09-01', 'departure_date' => '2026-09-05',
+            'arrival_eating' => 1, 'departure_eating' => 2, 'amount' => 0,
+            'created_at' => now(), 'updated_at' => now(),
+        ]);
+
+        $event = $this->updateGroupType($event, ParticipantGroupType::ParentGroup);
+
+        $this->assertSame('local_group', $event->participant_group_type);
+    }
+}
diff --git a/tests/Feature/ShortSignUpTest.php b/tests/Feature/ShortSignUpTest.php
index ed5dbcc..b35eeeb 100644
--- a/tests/Feature/ShortSignUpTest.php
+++ b/tests/Feature/ShortSignUpTest.php
@@ -7,10 +7,12 @@ use App\Domains\Event\Actions\ShortSignUp\ShortSignUpRequest;
 use App\Enumerations\EatingHabit;
 use App\Enumerations\EfzStatus;
 use App\Enumerations\FirstAidPermission;
+use App\Enumerations\ParticipantGroupType;
 use App\Enumerations\ParticipationType;
 use App\Enumerations\SwimmingPermission;
 use App\Models\Event;
 use App\Models\EventParticipant;
+use App\Models\ParentGroup;
 use App\Models\PaymentMethod;
 use App\Models\Tenant;
 use App\RelationModels\EventParticipationFee;
@@ -294,7 +296,7 @@ class ShortSignUpTest extends TestCase
         $this->assertSame(0, EventParticipant::count());
     }
 
-    private function createLocalGroup(string $slug, string $name): Tenant
+    private function createLocalGroup(string $slug, string $name, ?ParentGroup $parentGroup = null): Tenant
     {
         return Tenant::create([
             'slug' => $slug, 'name' => $name, 'email' => $slug . '@example.com',
@@ -302,9 +304,70 @@ class ShortSignUpTest extends TestCase
             'account_name' => $name, 'account_iban' => 'DE00', 'account_bic' => 'XY',
             'city' => 'Stadt', 'postcode' => '00000', 'is_active_local_group' => true,
             'has_active_instance' => false,
+            'parent_group_id' => $parentGroup?->id,
         ]);
     }
 
+    public function test_bund_abfrage_ordnet_einzigen_bund_ohne_auswahl_zu(): void
+    {
+        $event = $this->createEvent();
+        $event->update(['participant_group_type' => ParticipantGroupType::ParentGroup->value]);
+        $bdp = ParentGroup::where('name', 'BdP')->firstOrFail();
+        // Zwei Stämme desselben Bundes ergeben genau eine Option.
+        $event->localGroups()->attach([
+            $this->createLocalGroup('stamm-a', 'Stamm A', $bdp)->id,
+            $this->createLocalGroup('stamm-b', 'Stamm B', $bdp)->id,
+        ]);
+        $event->refresh();
+
+        $response = new ShortSignUpCommand($this->shortRequest($event))->execute();
+
+        $this->assertTrue($response->success, $response->message ?? '');
+        $this->assertSame($bdp->id, $response->participant->parent_group_id);
+        $this->assertNull($response->participant->local_group);
+        $this->assertSame('BdP', $response->participant->toResource()->toArray(request())['participantGroup']);
+    }
+
+    public function test_bund_abfrage_uebernimmt_gewaehlten_bund(): void
+    {
+        $event = $this->createEvent();
+        $event->update(['participant_group_type' => ParticipantGroupType::ParentGroup->value]);
+        $bdp = ParentGroup::where('name', 'BdP')->firstOrFail();
+        $vcp = ParentGroup::where('name', 'VCP')->firstOrFail();
+        $event->localGroups()->attach([
+            $this->createLocalGroup('stamm-a', 'Stamm A', $bdp)->id,
+            $this->createLocalGroup('stamm-b', 'Stamm B', $vcp)->id,
+        ]);
+        $event->refresh();
+
+        $response = new ShortSignUpCommand($this->shortRequest($event, [
+            'localGroupId' => $vcp->id,
+        ]))->execute();
+
+        $this->assertTrue($response->success, $response->message ?? '');
+        $this->assertSame($vcp->id, $response->participant->parent_group_id);
+    }
+
+    public function test_bund_abfrage_lehnt_nicht_beteiligten_bund_ab(): void
+    {
+        $event = $this->createEvent();
+        $event->update(['participant_group_type' => ParticipantGroupType::ParentGroup->value]);
+        $event->localGroups()->attach([
+            $this->createLocalGroup('stamm-a', 'Stamm A', ParentGroup::where('name', 'BdP')->firstOrFail())->id,
+            $this->createLocalGroup('stamm-b', 'Stamm B', ParentGroup::where('name', 'VCP')->firstOrFail())->id,
+        ]);
+        $event->refresh();
+
+        // Der Bund existiert, aber kein teilnehmender Stamm gehört zu ihm.
+        $response = new ShortSignUpCommand($this->shortRequest($event, [
+            'localGroupId' => ParentGroup::where('name', 'DPSG')->firstOrFail()->id,
+        ]))->execute();
+
+        $this->assertFalse($response->success);
+        $this->assertSame('Bitte bei „Bund" eine Auswahl treffen.', $response->message);
+        $this->assertSame(0, EventParticipant::count());
+    }
+
     public function test_einziger_stamm_wird_ohne_auswahl_zugeordnet(): void
     {
         $event = $this->createEvent();
@@ -377,7 +440,7 @@ class ShortSignUpTest extends TestCase
         // Regressionswächter für Teilnehmerliste, Detailansicht und CSV-Export.
         $array = $response->participant->toResource()->toArray(request());
 
-        $this->assertSame('Nicht im LV', $array['localgroup']);
+        $this->assertSame('Nicht im LV', $array['participantGroup']);
         $this->assertSame('Erteilt', $array['swimmingPermission']);
         $this->assertSame('Zugestimmt', $array['extendedFirstAid']);
         $this->assertSame('Omnivor', $array['eatingHabit']);
diff --git a/version b/version
index dad10c7..2da4316 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-4.9.2
+4.10.0