diff --git a/core/src/com/unciv/logic/city/managers/CityConquestFunctions.kt b/core/src/com/unciv/logic/city/managers/CityConquestFunctions.kt
index 95be16308f..b200669a4c 100644
--- a/core/src/com/unciv/logic/city/managers/CityConquestFunctions.kt
+++ b/core/src/com/unciv/logic/city/managers/CityConquestFunctions.kt
@@ -16,6 +16,7 @@ import com.unciv.logic.trade.TradeLogic
 import com.unciv.logic.trade.TradeOffer
 import com.unciv.logic.trade.TradeOfferType
 import com.unciv.models.ruleset.unique.StateForConditionals
+import com.unciv.models.ruleset.unique.UniqueTriggerActivation
 import com.unciv.models.ruleset.unique.UniqueType
 import kotlin.math.max
 import kotlin.math.min
@@ -119,6 +120,10 @@ class CityConquestFunctions(val city: City) {
             // reconquering or liberating city in resistance so eliminate it
             city.removeFlag(CityFlags.Resistance)
         }
+        
+        for (unique in conqueredCiv.getTriggeredUniques(UniqueType.TriggerUponLosingCity, StateForConditionals(civInfo = conqueredCiv))) {
+            UniqueTriggerActivation.triggerUnique(unique, civInfo = conqueredCiv)
+        }
     }
 
 
diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
index 21f4fcce50..6e6b861a4f 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
@@ -901,6 +901,7 @@ enum class UniqueType(
     TriggerUponEnteringGoldenAge("upon entering a Golden Age", UniqueTarget.TriggerCondition),
     /** Can be placed upon both units and as global */
     TriggerUponConqueringCity("upon conquering a city", UniqueTarget.TriggerCondition, UniqueTarget.UnitTriggerCondition),
+    TriggerUponLosingCity("upon losing a city", UniqueTarget.TriggerCondition),
     TriggerUponFoundingCity("upon founding a city", UniqueTarget.TriggerCondition),
     TriggerUponBuildingImprovement("upon building a [improvementFilter] improvement", UniqueTarget.TriggerCondition, UniqueTarget.UnitTriggerCondition),
     TriggerUponDiscoveringNaturalWonder("upon discovering a Natural Wonder", UniqueTarget.TriggerCondition),
diff --git a/docs/Modders/uniques.md b/docs/Modders/uniques.md
index 238af58fcb..8214ad1999 100644
--- a/docs/Modders/uniques.md
+++ b/docs/Modders/uniques.md
@@ -3312,6 +3312,9 @@ Simple unique parameters are explained by mouseover. Complex parameters are expl
 ??? example  "<upon conquering a city>"
 	Applicable to: TriggerCondition, UnitTriggerCondition
 
+??? example  "<upon losing a city>"
+	Applicable to: TriggerCondition
+
 ??? example  "<upon founding a city>"
 	Applicable to: TriggerCondition