diff --git a/core/src/com/unciv/logic/civilization/CityStateFunctions.kt b/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
index fb6135d786..f681f6f83c 100644
--- a/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
+++ b/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
@@ -525,6 +525,7 @@ class CityStateFunctions(val civInfo: CivilizationInfo) {
     /** A city state was attacked. What are its protectors going to do about it??? Also checks for Wary */
     fun cityStateAttacked(attacker: CivilizationInfo) {
         if (!civInfo.isCityState()) return // What are we doing here?
+        if (attacker.isCityState()) return // City states can't be upset with each other
 
         // We might become wary!
         if (attacker.isMinorCivWarmonger()) { // They've attacked a lot of city-states