diff --git a/src/battle.c b/src/battle.c
index e06d45979..73c0a74ec 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -4235,6 +4235,52 @@ static void battle_flee(battle * b)
     }
 }
 
+static bool is_enemy(battle *b, unit *u1, unit *u2) {
+	if (u1->faction != u2->faction) {
+		if (b) {
+			side *es, *s1 = 0, *s2 = 0;
+			for (es = b->sides; es != b->sides + b->nsides; ++es) {
+				if (!s1 && es->faction == u1->faction) s1 = es;
+				else if (!s2 && es->faction == u2->faction) s2 = es;
+				if (s1 && s2) break;
+			}
+			return enemy(s1, s2);
+		}
+		else {
+			return !help_enter(u1, u2);
+		}
+	}
+	return false;
+}
+
+void force_leave(region *r, battle *b) {
+	unit *u;
+
+	for (u = r->units; u; u = u->next) {
+		unit *uo = NULL;
+		if (u->building) {
+			uo = building_owner(u->building);
+		}
+		if (u->ship && r->land) {
+			uo = ship_owner(u->ship);
+		}
+		if (uo && is_enemy(b, uo, u)) {
+			message *msg = NULL;
+			if (u->building) {
+				msg = msg_message("force_leave_building", "unit owner building", u, uo, u->building);
+			}
+			else {
+				msg = msg_message("force_leave_ship", "unit owner ship", u, uo, u->ship);
+			}
+			if (msg) {
+				ADDMSG(&u->faction->msgs, msg);
+			}
+			leave(u, false);
+		}
+	}
+}
+
+
 void do_battle(region * r)
 {
     battle *b = NULL;
@@ -4307,7 +4353,7 @@ void do_battle(region * r)
     /* Auswirkungen berechnen: */
     aftermath(b);
     if (rule_force_leave(FORCE_LEAVE_POSTCOMBAT)) {
-        force_leave(b->region);
+        force_leave(b->region, b);
     }
     /* Hier ist das Gefecht beendet, und wir können die
      * Hilfsstrukturen * wieder löschen: */
diff --git a/src/battle.h b/src/battle.h
index 075edf496..8d29d733a 100644
--- a/src/battle.h
+++ b/src/battle.h
@@ -270,6 +270,7 @@ extern "C" {
         const struct group * g, unsigned int flags,
         const struct faction * stealthfaction);
     int skilldiff(troop at, troop dt, int dist);
+	void force_leave(struct region *r, struct battle *b);
 
 #ifdef __cplusplus
 }
diff --git a/src/laws.c b/src/laws.c
index 46c471cd5..fb4daa76f 100755
--- a/src/laws.c
+++ b/src/laws.c
@@ -4307,34 +4307,12 @@ static void enter_2(region * r)
     do_enter(r, 1);
 }
 
-static bool help_enter(unit *uo, unit *u) {
+bool help_enter(unit *uo, unit *u) {
     return uo->faction == u->faction || alliedunit(uo, u->faction, HELP_GUARD);
 }
 
-void force_leave(region *r) {
-    unit *u;
-    for (u = r->units; u; u = u->next) {
-        unit *uo = NULL;
-        if (u->building) {
-            uo = building_owner(u->building);
-        }
-        if (u->ship && r->land) {
-            uo = ship_owner(u->ship);
-        }
-        if (uo && !help_enter(uo, u)) {
-            message *msg = NULL;
-            if (u->building) {
-                msg = msg_message("force_leave_building", "unit owner building", u, uo, u->building);
-            }
-            else {
-                msg = msg_message("force_leave_ship", "unit owner ship", u, uo, u->ship);
-            }
-            if (msg) {
-                ADDMSG(&u->faction->msgs, msg);
-            }
-            leave(u, false);
-        }
-    }
+static void do_force_leave(region *r) {
+	force_leave(r, NULL);
 }
 
 bool rule_force_leave(int flags) {
@@ -4450,7 +4428,7 @@ void init_processor(void)
 
     p += 10;                      /* rest rng again before economics */
     if (rule_force_leave(FORCE_LEAVE_ALL)) {
-        add_proc_region(p, force_leave, "kick non-allies out of buildings/ships");
+        add_proc_region(p, do_force_leave, "kick non-allies out of buildings/ships");
     }
     add_proc_region(p, economics, "Zerstoeren, Geben, Rekrutieren, Vergessen");
     add_proc_order(p, K_PROMOTION, promotion_cmd, 0, "Heldenbefoerderung");
diff --git a/src/laws.h b/src/laws.h
index 6da5ed5de..7eec612e3 100755
--- a/src/laws.h
+++ b/src/laws.h
@@ -110,7 +110,7 @@ extern "C" {
     #define FORCE_LEAVE_POSTCOMBAT 1
     #define FORCE_LEAVE_ALL 2
     bool rule_force_leave(int flag);
-    void force_leave(struct region *r);
+	bool help_enter(struct unit *uo, struct unit *u);
 
 #ifdef __cplusplus
 }
diff --git a/src/laws.test.c b/src/laws.test.c
index 4c9f43ba5..8a02d6ef4 100644
--- a/src/laws.test.c
+++ b/src/laws.test.c
@@ -1,5 +1,6 @@
 #include <platform.h>
 #include "laws.h"
+#include "battle.h"
 
 #include <kernel/ally.h>
 #include <kernel/config.h>
@@ -261,8 +262,8 @@ static void test_force_leave_buildings(CuTest *tc) {
     building_set_owner(u1);
     u_set_building(u2, b);
     u_set_building(u3, b);
-    force_leave(r);
-    CuAssertPtrEquals_Msg(tc, "owner should not be forecd to leave", b, u1->building);
+    force_leave(r, NULL);
+    CuAssertPtrEquals_Msg(tc, "owner should not be forced to leave", b, u1->building);
     CuAssertPtrEquals_Msg(tc, "same faction should not be forced to leave", b, u2->building);
     CuAssertPtrEquals_Msg(tc, "non-allies should be forced to leave", NULL, u3->building);
     msg = test_get_last_message(u3->faction->msgs);
@@ -271,7 +272,7 @@ static void test_force_leave_buildings(CuTest *tc) {
     u_set_building(u3, b);
     al = ally_add(&u1->faction->allies, u3->faction);
     al->status = HELP_GUARD;
-    force_leave(r);
+    force_leave(r, NULL);
     CuAssertPtrEquals_Msg(tc, "allies should not be forced to leave", b, u3->building);
     test_cleanup();
 }
@@ -289,7 +290,7 @@ static void test_force_leave_ships(CuTest *tc) {
     u_set_ship(u1, sh);
     u_set_ship(u2, sh);
     ship_set_owner(u1);
-    force_leave(r);
+    force_leave(r, NULL);
     CuAssertPtrEquals_Msg(tc, "non-allies should be forced to leave", NULL, u2->ship);
     msg = test_get_last_message(u2->faction->msgs);
     CuAssertStrEquals(tc, "force_leave_ship", test_get_messagetype(msg));
@@ -308,7 +309,7 @@ static void test_force_leave_ships_on_ocean(CuTest *tc) {
     u_set_ship(u1, sh);
     u_set_ship(u2, sh);
     ship_set_owner(u1);
-    force_leave(r);
+    force_leave(r, NULL);
     CuAssertPtrEquals_Msg(tc, "no forcing out of ships on oceans", sh, u2->ship);
     test_cleanup();
 }