diff --git a/apps/api/src/combat/combat-equipment-integration.spec.ts b/apps/api/src/combat/combat-equipment-integration.spec.ts
new file mode 100644
index 0000000..5c35545
--- /dev/null
+++ b/apps/api/src/combat/combat-equipment-integration.spec.ts
@@ -0,0 +1,374 @@
+import { DataSource, EntityManager, EntityTarget } from 'typeorm';
+import { CharacterStatsService } from '../characters/character-stats.service';
+import { Character } from '../characters/entities/character.entity';
+import { CharacterEquipment } from '../equipment/entities/character-equipment.entity';
+import { EquipmentService } from '../equipment/equipment.service';
+import { Hunt } from '../hunting/entities/hunt.entity';
+import { HuntEncounter } from '../hunting/entities/hunt-encounter.entity';
+import { HuntEncounterStatus } from '../hunting/hunt-encounter-status.enum';
+import { HuntStatus } from '../hunting/hunt-status.enum';
+import { CharacterItem } from '../items/entities/character-item.entity';
+import { ItemDefinition } from '../items/entities/item-definition.entity';
+import { EquipmentSlot } from '../items/equipment-slot.enum';
+import { ItemRarity } from '../items/item-rarity.enum';
+import { ItemType } from '../items/item-type.enum';
+import { MonsterDefinition } from '../monsters/entities/monster-definition.entity';
+import { CombatRewardService } from '../rewards/combat-reward.service';
+import { TravelService } from '../travel/travel.service';
+import { CombatAction } from './combat-action.enum';
+import { CombatEngineService } from './combat-engine.service';
+import { CombatService } from './combat.service';
+import { CombatEvent } from './entities/combat-event.entity';
+import { Combat } from './entities/combat.entity';
+
+const CHARACTER_ID = '10000000-0000-4000-8000-000000000001';
+const HUNT_ID = '20000000-0000-4000-8000-000000000001';
+const MONSTER_ID = '40000000-0000-4000-8000-000000000001';
+const WORN_SWORD_DEFINITION_ID = '50000000-0000-4000-8000-000000000001';
+const BANDIT_BLADE_DEFINITION_ID = '50000000-0000-4000-8000-000000000002';
+const WORN_SWORD_ITEM_ID = '70000000-0000-4000-8000-000000000001';
+const BANDIT_BLADE_ITEM_ID = '70000000-0000-4000-8000-000000000002';
+
+interface FakeState {
+  characters: Character[];
+  hunts: Hunt[];
+  huntEncounters: HuntEncounter[];
+  monsters: MonsterDefinition[];
+  combats: Combat[];
+  combatEvents: CombatEvent[];
+  itemDefinitions: ItemDefinition[];
+  characterItems: CharacterItem[];
+  characterEquipment: CharacterEquipment[];
+}
+
+class FakeRepository<T extends { id: string }> {
+  constructor(
+    private readonly state: FakeState,
+    private readonly target: EntityTarget<T>,
+    private readonly dataSource: FakeDataSource,
+  ) {}
+
+  findOne(options: {
+    where: Partial<T>;
+    relations?: Record<string, unknown>;
+    lock?: { mode: string };
+  }): Promise<T | null> {
+    const row = this.rows().find((candidate) => this.matches(candidate, options.where)) ?? null;
+    return Promise.resolve(row ? this.withRelations(row, options.relations) : null);
+  }
+
+  findOneBy(where: Partial<T>): Promise<T | null> {
+    return Promise.resolve(this.rows().find((row) => this.matches(row, where)) ?? null);
+  }
+
+  find(options: {
+    where: Partial<T>;
+    relations?: Record<string, unknown>;
+    order?: Partial<Record<keyof T, 'ASC' | 'DESC'>>;
+  }): Promise<T[]> {
+    const matched = this.rows().filter((row) => this.matches(row, options.where));
+    return Promise.resolve(matched.map((row) => this.withRelations(row, options.relations)));
+  }
+
+  count(options: { where: Partial<T> }): Promise<number> {
+    return Promise.resolve(this.rows().filter((row) => this.matches(row, options.where)).length);
+  }
+
+  create(values: Partial<T>): T {
+    return { ...values } as T;
+  }
+
+  save(entity: T): Promise<T> {
+    if (!entity.id) {
+      entity.id = this.dataSource.nextId(this.targetName());
+    }
+    const rows = this.rows();
+    const index = rows.findIndex((row) => row.id === entity.id);
+    if (index === -1) {
+      rows.push(entity);
+    } else {
+      rows[index] = entity;
+    }
+    return Promise.resolve(entity);
+  }
+
+  private withRelations(row: T, relations?: Record<string, unknown>): T {
+    if (!relations) {
+      return row;
+    }
+    const copy = { ...row } as T & Record<string, unknown>;
+    if (this.target === CharacterItem && relations['itemDefinition']) {
+      const itemDefinitionId = (row as unknown as CharacterItem).itemDefinitionId;
+      copy['itemDefinition'] = this.state.itemDefinitions.find((d) => d.id === itemDefinitionId);
+    }
+    if (this.target === CharacterEquipment && relations['characterItem']) {
+      const characterItemId = (row as unknown as CharacterEquipment).characterItemId;
+      const characterItem = this.state.characterItems.find((ci) => ci.id === characterItemId);
+      copy['characterItem'] = characterItem
+        ? {
+            ...characterItem,
+            itemDefinition: this.state.itemDefinitions.find(
+              (d) => d.id === characterItem.itemDefinitionId,
+            ),
+          }
+        : undefined;
+    }
+    return copy as T;
+  }
+
+  private rows(): T[] {
+    if (this.target === Character) return this.state.characters as T[];
+    if (this.target === Hunt) return this.state.hunts as T[];
+    if (this.target === HuntEncounter) return this.state.huntEncounters as T[];
+    if (this.target === MonsterDefinition) return this.state.monsters as T[];
+    if (this.target === Combat) return this.state.combats as T[];
+    if (this.target === CombatEvent) return this.state.combatEvents as T[];
+    if (this.target === ItemDefinition) return this.state.itemDefinitions as T[];
+    if (this.target === CharacterItem) return this.state.characterItems as T[];
+    if (this.target === CharacterEquipment) return this.state.characterEquipment as T[];
+    throw new Error(`Unsupported repository ${this.targetName()}`);
+  }
+
+  private matches(row: T, where: Partial<T>): boolean {
+    return Object.entries(where).every(([key, value]) => row[key as keyof T] === value);
+  }
+
+  private targetName(): string {
+    return typeof this.target === 'function' ? this.target.name : 'EntitySchema';
+  }
+}
+
+class FakeDataSource {
+  private readonly idCounters = new Map<string, number>();
+  constructor(public state: FakeState) {}
+
+  getRepository<T extends { id: string }>(target: EntityTarget<T>) {
+    return new FakeRepository(this.state, target, this);
+  }
+
+  async transaction<T>(work: (manager: EntityManager) => Promise<T>): Promise<T> {
+    return work({
+      getRepository: <U extends { id: string }>(target: EntityTarget<U>) =>
+        this.getRepository(target),
+    } as unknown as EntityManager);
+  }
+
+  nextId(targetName: string): string {
+    const next = (this.idCounters.get(targetName) ?? 0) + 1;
+    this.idCounters.set(targetName, next);
+    return `${targetName.toLowerCase()}-generated-${next}`;
+  }
+}
+
+function character(overrides: Partial<Character> = {}): Character {
+  return {
+    id: CHARACTER_ID,
+    name: 'Aric Duskwalker',
+    level: 1,
+    experience: 0,
+    silver: 0,
+    baseHp: 100,
+    baseAttack: 6,
+    currentHp: 100,
+    currentLocationId: 'location-1',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as Character;
+}
+
+function monster(overrides: Partial<MonsterDefinition> = {}): MonsterDefinition {
+  return {
+    id: MONSTER_ID,
+    key: 'road-bandit',
+    name: 'Straßenräuber',
+    level: 2,
+    maxHp: 75,
+    attack: 9,
+    armor: 5,
+    experienceReward: 16,
+    silverMin: 9,
+    silverMax: 15,
+    artworkPath: '/images/monsters/road-bandit.png',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as MonsterDefinition;
+}
+
+function hunt(overrides: Partial<Hunt> = {}): Hunt {
+  return {
+    id: HUNT_ID,
+    characterId: CHARACTER_ID,
+    locationId: 'location-1',
+    status: HuntStatus.ACTIVE,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as Hunt;
+}
+
+function encounter(id: string, overrides: Partial<HuntEncounter> = {}): HuntEncounter {
+  return {
+    id,
+    huntId: HUNT_ID,
+    monsterDefinitionId: MONSTER_ID,
+    position: 0,
+    status: HuntEncounterStatus.AVAILABLE,
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as HuntEncounter;
+}
+
+function itemDefinition(overrides: Partial<ItemDefinition> = {}): ItemDefinition {
+  return {
+    id: WORN_SWORD_DEFINITION_ID,
+    key: 'worn-short-sword',
+    name: 'Abgenutztes Kurzschwert',
+    description: '',
+    type: ItemType.WEAPON,
+    equipmentSlot: EquipmentSlot.WEAPON,
+    rarity: ItemRarity.COMMON,
+    tier: 1,
+    requiredLevel: 1,
+    weaponDamage: 8,
+    bonusHp: 0,
+    bonusAttack: 0,
+    bonusArmor: 0,
+    sellPrice: 0,
+    iconPath: '/images/items/worn-short-sword.png',
+    createdAt: new Date('2026-08-18T09:00:00.000Z'),
+    updatedAt: new Date('2026-08-18T09:00:00.000Z'),
+    ...overrides,
+  } as ItemDefinition;
+}
+
+function fakeTravelService(): TravelService {
+  return { completeTravelIfDue: jest.fn().mockResolvedValue({ status: 'IDLE' }) } as unknown as TravelService;
+}
+
+function fakeRewardService(): CombatRewardService {
+  return {
+    grantVictoryRewards: jest.fn().mockResolvedValue({ experience: 0, silver: 0, items: [] }),
+    loadRewards: jest.fn().mockResolvedValue(null),
+  } as unknown as CombatRewardService;
+}
+
+function createHarness() {
+  const state: FakeState = {
+    characters: [character()],
+    hunts: [hunt()],
+    huntEncounters: [],
+    monsters: [monster()],
+    combats: [],
+    combatEvents: [],
+    itemDefinitions: [
+      itemDefinition(),
+      itemDefinition({
+        id: BANDIT_BLADE_DEFINITION_ID,
+        key: 'bandit-blade',
+        name: 'Räuberklinge',
+        weaponDamage: 11,
+        bonusAttack: 1,
+        iconPath: '/images/items/bandit-blade.png',
+      }),
+    ],
+    characterItems: [
+      {
+        id: WORN_SWORD_ITEM_ID,
+        characterId: CHARACTER_ID,
+        itemDefinitionId: WORN_SWORD_DEFINITION_ID,
+        quantity: 1,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      } as CharacterItem,
+      {
+        id: BANDIT_BLADE_ITEM_ID,
+        characterId: CHARACTER_ID,
+        itemDefinitionId: BANDIT_BLADE_DEFINITION_ID,
+        quantity: 1,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      } as CharacterItem,
+    ],
+    characterEquipment: [
+      {
+        id: 'equip-1',
+        characterId: CHARACTER_ID,
+        slot: EquipmentSlot.WEAPON,
+        characterItemId: WORN_SWORD_ITEM_ID,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      } as CharacterEquipment,
+    ],
+  };
+  const dataSource = new FakeDataSource(state);
+  const characterStats = new CharacterStatsService(dataSource as unknown as DataSource);
+  const equipmentService = new EquipmentService(dataSource as unknown as DataSource, characterStats);
+  const combatService = new CombatService(
+    dataSource as unknown as DataSource,
+    fakeTravelService(),
+    new CombatEngineService(),
+    characterStats,
+    fakeRewardService(),
+  );
+  return { state, equipmentService, combatService };
+}
+
+describe('equipping Räuberklinge increases combat damage (spec §45, §60)', () => {
+  it('deals more damage against the same monster after the upgrade than before it', async () => {
+    const { state, combatService, equipmentService } = createHarness();
+
+    state.huntEncounters.push(encounter('encounter-1'));
+    const before = await combatService.startCombat(CHARACTER_ID, 'encounter-1');
+    let beforeDamage = 0;
+    let beforeResult = before;
+    for (let round = 0; round < 10 && beforeResult.status === 'ACTIVE'; round += 1) {
+      beforeResult = await combatService.performAction(CHARACTER_ID, before.id, CombatAction.ATTACK);
+      if (round === 0) {
+        beforeDamage = before.monster.maxHp - beforeResult.monster.currentHp;
+      }
+    }
+    // Equipment cannot change during an active combat (spec §46), so this
+    // first fight must be resolved to completion before equipping.
+    expect(beforeResult.status).not.toBe('ACTIVE');
+
+    await equipmentService.equip(CHARACTER_ID, BANDIT_BLADE_ITEM_ID);
+
+    state.huntEncounters.push(encounter('encounter-2'));
+    const after = await combatService.startCombat(CHARACTER_ID, 'encounter-2');
+    const afterResult = await combatService.performAction(CHARACTER_ID, after.id, CombatAction.ATTACK);
+    const afterDamage = after.monster.maxHp - afterResult.monster.currentHp;
+
+    // (6+8) vs 5 armor -> round(14 * 60/65) = 13
+    expect(beforeDamage).toBe(13);
+    // (7+11) vs 5 armor -> round(18 * 60/65) = 17
+    expect(afterDamage).toBe(17);
+    expect(afterDamage).toBeGreaterThan(beforeDamage);
+  });
+
+  it('rejects equipping during an active combat, and never retroactively rewrites a finished combat\'s snapshot', async () => {
+    const { state, combatService, equipmentService } = createHarness();
+    state.huntEncounters.push(encounter('encounter-1'));
+
+    const combat = await combatService.startCombat(CHARACTER_ID, 'encounter-1');
+
+    // Equipment cannot change while this combat is ACTIVE (spec §46).
+    await expect(
+      equipmentService.equip(CHARACTER_ID, BANDIT_BLADE_ITEM_ID),
+    ).rejects.toMatchObject({ code: 'CHARACTER_IN_COMBAT' });
+
+    // Resolve the fight, then equip — the already-finished combat's snapshot
+    // (status/round) must stay exactly what it was when the fight ended.
+    let result = combat;
+    for (let round = 0; round < 10 && result.status === 'ACTIVE'; round += 1) {
+      result = await combatService.performAction(CHARACTER_ID, combat.id, CombatAction.ATTACK);
+    }
+    expect(result.status).not.toBe('ACTIVE');
+
+    await equipmentService.equip(CHARACTER_ID, BANDIT_BLADE_ITEM_ID);
+
+    const reloaded = await combatService.getCombat(CHARACTER_ID, combat.id);
+    expect(reloaded.status).toBe(result.status);
+    expect(reloaded.round).toBe(result.round);
+  });
+});