diff server/cityturn.c server/cityturn.c
--- server/cityturn.c	Mon Jul 31 20:08:13 2000
+++ server/cityturn.c	Mon Jul 31 20:22:01 2000
@@ -415,17 +415,23 @@
 **************************************************************************/
 int unit_being_aggressive(struct unit *punit)
 {
+  int n;
+
   if (get_unit_type(punit->type)->attack_strength==0)
     return 0;
   if (map_get_city(punit->x,punit->y))
     return 0;
   if (is_ground_unit(punit) &&
       map_get_special(punit->x,punit->y)&S_FORTRESS) {
-    city_list_iterate(get_player(punit->owner)->cities, pcity) {
-      if (real_map_distance(punit->x, punit->y, pcity->x, pcity->y)<=3)
-	return 0;
+    for(n=0; n < game.nplayers; n++) {
+      if (players_allied(punit->owner,n)) {
+        city_list_iterate(game.players[n].cities, pcity) {
+          if (real_map_distance(punit->x, punit->y, pcity->x, pcity->y)<=3)
+	    return 0;
+	}
+        city_list_iterate_end;
+      }
     }
-    city_list_iterate_end;
   }
   return 1;
 }