diff --git a/src/engine/objects/AbstractCharacter.java b/src/engine/objects/AbstractCharacter.java
index 48ff4cae..e6c83c23 100644
--- a/src/engine/objects/AbstractCharacter.java
+++ b/src/engine/objects/AbstractCharacter.java
@@ -1867,8 +1867,10 @@ public abstract class AbstractCharacter extends AbstractWorldObject {
                     // Siege engines switch to whoever damages them, players and pets alike.
                     // Misses and non-damaging powers do not pull them.
 
-                    if (target.isSiege() && value < 0f && attacker != null && !attacker.equals(target))
+                    if (target.isSiege() && value < 0f && attacker != null && !attacker.equals(target)) {
                         target.setCombatTarget(attacker);
+                        flagSiegeAttackerHostile(target, attacker);
+                    }
 
                     if (attacker.getObjectType().equals(GameObjectType.PlayerCharacter)) {
 
@@ -1903,6 +1905,41 @@ public abstract class AbstractCharacter extends AbstractWorldObject {
         return 0;
     }
 
+    private static void flagSiegeAttackerHostile(Mob siegeEngine, AbstractCharacter attacker) {
+
+        // Damaging a siege engine on a city grid flags the player hostile to that
+        // city, unless they belong to the city's nation or an allied nation.
+        // Pets flag their owner.
+
+        City city;
+        AbstractCharacter flagged;
+        Guild cityNation;
+
+        city = ZoneManager.getCityAtLocation(siegeEngine.loc);
+
+        if (city == null)
+            return;
+
+        flagged = attacker;
+
+        if (attacker.getObjectType().equals(GameObjectType.Mob))
+            flagged = ((Mob) attacker).guardCaptain;
+
+        if (flagged == null || !flagged.getObjectType().equals(GameObjectType.PlayerCharacter))
+            return;
+
+        cityNation = city.getGuild().getNation();
+
+        if (flagged.getGuild().getNation().equals(cityNation))
+            return;
+
+        if (cityNation.getAllyList().contains(flagged.getGuild().getNation()))
+            return;
+
+        if (!city.cityOutlaws.contains(flagged.getObjectUUID()))
+            city.cityOutlaws.add(flagged.getObjectUUID());
+    }
+
     public float getCurrentHitpoints() {
         return this.health.get();
     }