diff --git a/res/core/resources/iron.xml b/res/core/resources/iron.xml
index 7bc4cb428..3f8897abc 100644
--- a/res/core/resources/iron.xml
+++ b/res/core/resources/iron.xml
@@ -7,6 +7,5 @@
     <modifier building="mine" type="skill" value="1"/>
     <modifier building="mine" type="material" value="0.5"/>
     <modifier race="dwarf" type="material" value="0.60"/>
-    <guard flag="mining"/>
   </resourcelimit>
 </resource>
diff --git a/res/core/resources/laen.xml b/res/core/resources/laen.xml
index 571026a0a..12062bf07 100644
--- a/res/core/resources/laen.xml
+++ b/res/core/resources/laen.xml
@@ -5,6 +5,5 @@
   </item>
   <resourcelimit>
     <modifier type="require" building="mine"/>
-    <guard flag="mining"/>
   </resourcelimit>
 </resource>
diff --git a/res/core/resources/log.xml b/res/core/resources/log.xml
index 012fe9a20..e3a33ef8b 100644
--- a/res/core/resources/log.xml
+++ b/res/core/resources/log.xml
@@ -6,7 +6,6 @@
   <resourcelimit>
     <modifier building="sawmill" type="skill" value="1"/>
     <modifier building="sawmill" type="material" value="0.5"/>
-    <guard flag="logging"/>
     <function name="produce" value="lua_produceresource"/>
     <function name="limit" value="lua_limitresource"/>
   </resourcelimit>
diff --git a/s/cmake-init b/s/cmake-init
index 2cd5b4834..b1ea6759a 100755
--- a/s/cmake-init
+++ b/s/cmake-init
@@ -46,9 +46,9 @@ if [ "$HAVE_TOLUA" = "0" ] || [ -z $path ] ; then
  echo "tolua is not installed, building from source"
  cd $ROOT
  if [ ! -d tolua ]; then
-  LUA_VERSION="5.1"
-  if [ -d /usr/include/lua5.2 ] || [ -d /usr/local/include/lua5.2 ]; then
-   LUA_VERSION="5.2"
+  LUA_VERSION="5.2"
+  if [ -d /usr/include/lua5.1 ] || [ -d /usr/local/include/lua5.1 ]; then
+   LUA_VERSION="5.1"
   fi
   echo "fetching tolua ${LUA_VERSION} from github..."
   git clone https://github.com/ennorehling/tolua-${LUA_VERSION}.git tolua
diff --git a/scripts/tests/e2/guard.lua b/scripts/tests/e2/guard.lua
index f5be800c2..8e62a364d 100644
--- a/scripts/tests/e2/guard.lua
+++ b/scripts/tests/e2/guard.lua
@@ -13,24 +13,24 @@ function test_guard_unarmed()
     local r1 = region.create(0, 0, "plain")
     local f1 = faction.create("hodor@eressea.de", "human", "de")
     local u1 = unit.create(f1, r1, 1)
-    assert_equal(nil, u1.guard)
+    assert_equal(false, u1.guard)
     u1:clear_orders()
     u1:add_order("BEWACHE")
     process_orders()
-    assert_equal(nil, u1.guard)
+    assert_equal(false, u1.guard)
 end
 
 function test_guard_armed()
     local r1 = region.create(0, 0, "plain")
     local f1 = faction.create("hodor@eressea.de", "human", "de")
     local u1 = unit.create(f1, r1, 1)
-    assert_equal(nil, u1.guard)
+    assert_equal(false, u1.guard)
     u1:add_item("sword", 1)
     u1:set_skill("melee", 2)
     u1:clear_orders()
     u1:add_order("BEWACHE")
     process_orders()
-    assert_equal(249, u1.guard)
+    assert_equal(true, u1.guard)
 end
 
 function test_guard_allows_move_after_combat() -- bug 1493
@@ -47,7 +47,7 @@ function test_guard_allows_move_after_combat() -- bug 1493
     u1:clear_orders()
     u1:add_order("BEWACHE")
     process_orders()
-    assert_equal(249, u1.guard)
+    assert_equal(true, u1.guard)
     u1:clear_orders()
     u1:add_order("NACH O")
     u1:add_order("ATTACKIERE " .. itoa36(u2.id))
@@ -67,7 +67,7 @@ function test_no_guard_no_move_after_combat() -- bug 1493
     u1:add_order("BEWACHE")
     u1:add_item("sword", 10)
     u1:set_skill("melee", 2)
-    assert_equal(nil, u1.guard)
+    assert_equal(false, u1.guard)
     u1:clear_orders()
     u1:add_order("NACH O")
     u1:add_order("ATTACKIERE " .. itoa36(u2.id))
diff --git a/scripts/tests/e2/init.lua b/scripts/tests/e2/init.lua
index 2fdad1898..afaac7209 100644
--- a/scripts/tests/e2/init.lua
+++ b/scripts/tests/e2/init.lua
@@ -1,3 +1,5 @@
+require 'tests.economy'
+
 require 'tests.e2.undead'
 require 'tests.e2.shiplanding'
 require 'tests.e2.e2features'
diff --git a/scripts/tests/economy.lua b/scripts/tests/economy.lua
new file mode 100644
index 000000000..b628dd47b
--- /dev/null
+++ b/scripts/tests/economy.lua
@@ -0,0 +1,146 @@
+require "lunit"
+
+module("tests.economy", package.seeall, lunit.testcase)
+
+function setup()
+    eressea.free_game()
+    eressea.settings.set("NewbieImmunity", "0")
+    eressea.settings.set("study.produceexp", "0")
+    eressea.settings.set("nmr.timeout", "0")
+    eressea.settings.set("rules.food.flags", "4") -- FOOD_IS_FREE
+    eressea.settings.set("rules.encounters", "0")
+end
+
+function test_no_guards()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("tree", 100)
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("forestry", 1)
+    u:add_order("MACHE HOLZ")
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+    process_orders()
+    assert_equal(2, u:get_item("log"))
+end
+
+function test_elf_guards_trees()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("tree", 100)
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("forestry", 1)
+    local guard = unit.create(faction.create("elf"), r, 1, "elf")
+    guard:add_order("BEWACHEN") -- fails, because unarmed
+    u:add_order("MACHE HOLZ")
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+    guard:add_item("sword", 1)
+    guard:set_skill("melee", 1)
+    guard:add_order("BEWACHEN") -- success
+    process_orders()
+    -- GUARD starts after MAKE:
+    assert_equal(2, u:get_item("log"))
+    process_orders()
+    -- GUARD was active this turn:
+    assert_equal(2, u:get_item("log"))
+end
+
+function test_catapults_dont_guard()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("tree", 100)
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("forestry", 1)
+    local guard = unit.create(faction.create("elf"), r, 1, "elf")
+    guard:add_order("BEWACHEN")
+    u:add_order("MACHE HOLZ")
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+    guard:add_item("catapult", 1)
+    guard:set_skill("catapult", 1)
+    guard:add_order("BEWACHEN")
+    process_orders()
+    -- GUARD starts after MAKE:
+    assert_equal(2, u:get_item("log"))
+    process_orders()
+    -- GUARD was active this turn, but catapults do not count:
+    assert_equal(3, u:get_item("log"))
+end
+
+function test_ent_guards_trees()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("tree", 100)
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("forestry", 1)
+    local guard = unit.create(get_monsters(), r, 1, "ent")
+    guard:add_order("BEWACHEN")
+    u:add_order("MACHE HOLZ")
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+end
+
+function test_guard_stops_recruit()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("peasant", 100)
+    local u = unit.create(faction.create("human"), r)
+    local guard = unit.create(get_monsters(), r, 1)
+    guard:add_order("BEWACHEN")
+
+    u:add_item("money", 1000)
+    assert_equal(1, u.number)
+    u:add_order("REKRUTIERE 1")
+    process_orders()
+    assert_equal(2, u.number)
+    u:add_order("REKRUTIERE 1")
+    process_orders()
+    assert_equal(2, u.number)
+end
+
+function test_guard_protects_iron()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("iron", 100)
+    local level = r:get_resourcelevel("iron")
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("mining", level)
+    local guard = unit.create(get_monsters(), r, 1)
+    guard:add_order("BEWACHEN")
+
+    u:add_order("MACHE EISEN")
+    process_orders()
+    assert_equal(level, u:get_item("iron"))
+    process_orders()
+    assert_equal(level, u:get_item("iron"))
+end
+
+function test_ironkeeper_guards_iron()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("iron", 100)
+    local level = r:get_resourcelevel("iron")
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("mining", level)
+    local guard = unit.create(faction.create("mountainguard"), r, 1, "mountainguard")
+    guard:add_order("BEWACHEN")
+    u:add_order("MACHE EISEN")
+    process_orders()
+    assert_equal(level, u:get_item("iron"))
+    process_orders()
+    assert_equal(level, u:get_item("iron"))
+end
+
+function test_ent_guards_trees()
+    local r = region.create(0, 0, "plain")
+    r:set_resource("tree", 100)
+    local u = unit.create(faction.create("human"), r)
+    u:set_skill("mining", 1)
+    local guard = unit.create(get_monsters(), r, 1, "ent")
+    u:set_skill("forestry", 1)
+    guard:clear_orders()
+    u:clear_orders()
+
+    guard:add_order("BEWACHEN")
+    u:add_order("MACHE HOLZ")
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+    process_orders()
+    assert_equal(1, u:get_item("log"))
+end
diff --git a/scripts/tests/xmas.lua b/scripts/tests/xmas.lua
index e1cd4753b..bbd4941f2 100644
--- a/scripts/tests/xmas.lua
+++ b/scripts/tests/xmas.lua
@@ -6,6 +6,7 @@ function setup()
     eressea.free_game()
     eressea.settings.set("nmr.timeout", "0")
     eressea.settings.set("rules.grow.formula", "0")
+    eressea.settings.set("rules.peasants.growth.factor", "0")
 end
 
 function test_snowglobe_fail()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index df92085db..b4e600e0d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -192,6 +192,7 @@ set(TESTS_SRC
   donations.test.c
   wormhole.test.c
   alchemy.test.c
+  guard.test.c
   test_eressea.c
   tests.c
   battle.test.c
diff --git a/src/alchemy.c b/src/alchemy.c
index 89b00c5f0..7eac102fb 100644
--- a/src/alchemy.c
+++ b/src/alchemy.c
@@ -19,7 +19,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include <platform.h>
 #include <kernel/config.h>
 #include "alchemy.h"
-#include "move.h"
+#include "guard.h"
 #include "skill.h"
 #include "study.h"
 
@@ -61,7 +61,7 @@ void herbsearch(unit * u, int max)
         return;
     }
 
-    if (is_guarded(r, u, GUARD_PRODUCE)) {
+    if (is_guarded(r, u)) {
         cmistake(u, u->thisorder, 70, MSG_EVENT);
         return;
     }
diff --git a/src/alchemy.test.c b/src/alchemy.test.c
index 7fd2da8e1..c281a1c98 100644
--- a/src/alchemy.test.c
+++ b/src/alchemy.test.c
@@ -30,7 +30,7 @@ static void test_herbsearch(CuTest * tc)
     rc = rc_get_or_create("dragon");
     rc->flags |= RCF_UNARMEDGUARD;
     u2 = test_create_unit(test_create_faction(rc), r);
-    guard(u2, GUARD_PRODUCE);
+    setguard(u2, true);
 
     f = test_create_faction(0);
     u = test_create_unit(f, r);
@@ -41,14 +41,14 @@ static void test_herbsearch(CuTest * tc)
     test_clear_messages(f);
 
     set_level(u, SK_HERBALISM, 1);
-    CuAssertPtrEquals(tc, u2, is_guarded(r, u, GUARD_PRODUCE));
+    CuAssertPtrEquals(tc, u2, is_guarded(r, u));
     herbsearch(u, INT_MAX);
     CuAssertPtrNotNull(tc, test_find_messagetype(f->msgs, "error70"));
     CuAssertPtrEquals(tc, 0, test_find_messagetype(f->msgs, "error59"));
     test_clear_messages(f);
 
-    guard(u2, GUARD_NONE);
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u, GUARD_PRODUCE));
+    setguard(u2, false);
+    CuAssertPtrEquals(tc, 0, is_guarded(r, u));
     CuAssertPtrEquals(tc, 0, (void *)rherbtype(r));
     herbsearch(u, INT_MAX);
     CuAssertPtrNotNull(tc, test_find_messagetype(f->msgs, "error108"));
diff --git a/src/attributes/attributes.c b/src/attributes/attributes.c
index a82e1941d..e46988667 100644
--- a/src/attributes/attributes.c
+++ b/src/attributes/attributes.c
@@ -22,7 +22,6 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 #include "laws.h"
 #include "move.h"
-#include "guard.h"
 
 /* attributes includes */
 #include "follow.h"
@@ -105,7 +104,6 @@ void register_attributes(void)
     at_register(&at_private);
 
     at_register(&at_icastle);
-    at_register(&at_guard);
     at_register(&at_group);
 
     at_register(&at_building_generic_type);
@@ -124,6 +122,7 @@ void register_attributes(void)
     at_deprecate("xontormiaexpress", a_readint);    /* required for old datafiles */
     at_deprecate("lua", read_ext);    /* required for old datafiles */
     at_deprecate("gm", a_readint);
+    at_deprecate("guard", a_readint); /* used to contain guard-flags (v3.10.0-259-g8597e8b) */
     at_register(&at_stealth);
     at_register(&at_dict);
     at_register(&at_unitdissolve);
diff --git a/src/battle.c b/src/battle.c
index fb411d778..5bf35f191 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -2425,7 +2425,7 @@ side *make_side(battle * b, const faction * f, const group * g,
     else {
         unit *u;
         for (u = b->region->units; u; u = u->next) {
-            if (is_guard(u, HELP_ALL)) {
+            if (is_guard(u)) {
                 if (alliedunit(u, f, HELP_GUARD)) {
                     flags |= SIDE_HASGUARDS;
                     break;
@@ -2726,7 +2726,7 @@ static void aftermath(battle * b)
                     }
                     scale_number(du, df->run.number);
                     du->hp = df->run.hp;
-                    setguard(du, GUARD_NONE);
+                    setguard(du, false);
                     /* must leave ships or buildings, or a stealthy hobbit
                      * can hold castles indefinitely */
                     if (!fval(r->terrain, SEA_REGION)) {
@@ -2763,7 +2763,7 @@ static void aftermath(battle * b)
                     /* Distribute Loot */
                     loot_items(df);
 
-                    setguard(du, GUARD_NONE);
+                    setguard(du, true);
                     scale_number(du, 0);
                 }
                 else {
@@ -3878,7 +3878,7 @@ static void flee(const troop dt)
     fig->run.hp += fig->person[dt.index].hp;
     ++fig->run.number;
 
-    setguard(u, GUARD_NONE);
+    setguard(u, false);
 
     kill_troop(dt);
 }
@@ -3941,7 +3941,7 @@ static bool start_battle(region * r, battle ** bp)
 
                     if ((u->ship != NULL && !fval(r->terrain, SEA_REGION))
                         || (lsh = leftship(u)) != NULL) {
-                        if (is_guarded(r, u, GUARD_TRAVELTHRU)) {
+                        if (is_guarded(r, u)) {
                             if (lsh) {
                                 cmistake(u, ord, 234, MSG_BATTLE);
                             }
diff --git a/src/bind_monsters.c b/src/bind_monsters.c
index 271045491..3e3f24bee 100644
--- a/src/bind_monsters.c
+++ b/src/bind_monsters.c
@@ -47,6 +47,12 @@ static int tolua_spawn_dragons(lua_State * L)
     return 0;
 }
 
+static int tolua_get_monsters(lua_State * L)
+{
+    tolua_pushusertype(L, get_monsters(), "faction");
+    return 1;
+}
+
 static int tolua_spawn_undead(lua_State * L)
 {
     spawn_undead();
@@ -90,7 +96,8 @@ void bind_monsters(struct lua_State *L)
         tolua_function(L, TOLUA_CAST "plan_monsters", tolua_planmonsters);
         tolua_function(L, TOLUA_CAST "spawn_undead", tolua_spawn_undead);
         tolua_function(L, TOLUA_CAST "spawn_dragons", tolua_spawn_dragons);
-        tolua_function(L, TOLUA_CAST "fix_familiars", &fix_familiars);
+        tolua_function(L, TOLUA_CAST "fix_familiars", fix_familiars);
+        tolua_function(L, TOLUA_CAST "get_monsters", tolua_get_monsters);
     }
     tolua_endmodule(L);
 }
diff --git a/src/bind_unit.c b/src/bind_unit.c
index 3f3848e78..576678642 100755
--- a/src/bind_unit.c
+++ b/src/bind_unit.c
@@ -258,18 +258,15 @@ static int tolua_unit_set_flags(lua_State * L)
 static int tolua_unit_get_guard(lua_State * L)
 {
     unit *self = (unit *)tolua_tousertype(L, 1, 0);
-    if (is_guard(self, GUARD_ALL)) {
-        lua_pushinteger(L, getguard(self));
-        return 1;
-    }
-    return 0;
+    lua_pushboolean(L, is_guard(self));
+    return 1;
 }
 
 static int tolua_unit_set_guard(lua_State * L)
 {
     unit *self = (unit *)tolua_tousertype(L, 1, 0);
     unsigned int flags = (unsigned int)tolua_tonumber(L, 2, 0);
-    setguard(self, flags);
+    setguard(self, flags!=0);
     return 0;
 }
 
diff --git a/src/creport.c b/src/creport.c
index 5e7442030..0eb2d4abb 100644
--- a/src/creport.c
+++ b/src/creport.c
@@ -849,7 +849,7 @@ void cr_output_unit(stream *out, const region * r, const faction * f,
         assert(u->ship->region);
         stream_printf(out, "%d;Schiff\n", u->ship->no);
     }
-    if (is_guard(u, GUARD_ALL) != 0) {
+    if (is_guard(u)) {
         stream_printf(out, "%d;bewacht\n", 1);
     }
     if ((b = usiege(u)) != NULL) {
diff --git a/src/economy.c b/src/economy.c
index 6ec5d9191..1836c1305 100644
--- a/src/economy.c
+++ b/src/economy.c
@@ -459,7 +459,7 @@ static void recruit(unit * u, struct order *ord, request ** recruitorders)
     /* this is a very special case because the recruiting unit may be empty
      * at this point and we have to look at the creating unit instead. This
      * is done in cansee, which is called indirectly by is_guarded(). */
-    if (is_guarded(r, u, GUARD_RECRUIT)) {
+    if (is_guarded(r, u)) {
         cmistake(u, ord, 70, MSG_EVENT);
         return;
     }
@@ -872,19 +872,6 @@ typedef struct allocation_list {
 
 static allocation_list *allocations;
 
-static bool can_guard(const unit * guard, const unit * u)
-{
-    if (fval(guard, UFL_ISNEW))
-        return false;
-    if (guard->number <= 0 || !cansee(guard->faction, guard->region, u, 0))
-        return false;
-    if (besieged(guard) || !(fval(u_race(guard), RCF_UNARMEDGUARD)
-        || armedmen(guard, true)))
-        return false;
-
-    return !alliedunit(guard, u->faction, HELP_GUARD);
-}
-
 enum {
     AFL_DONE = 1 << 0,
     AFL_LOWSKILL = 1 << 1
@@ -935,17 +922,6 @@ static void allocate_resource(unit * u, const resource_type * rtype, int want)
         }
     }
 
-    if (rdata->guard != 0) {
-        unit *u2;
-        for (u2 = r->units; u2; u2 = u2->next) {
-            if (is_guard(u2, rdata->guard) != 0 && can_guard(u2, u)) {
-                ADDMSG(&u->faction->msgs,
-                    msg_feedback(u, u->thisorder, "region_guarded", "guard", u2));
-                return;
-            }
-        }
-    }
-
     /* Bergwächter können Abbau von Eisen/Laen durch Bewachen verhindern.
      * Als magische Wesen 'sehen' Bergwächter alles und werden durch
      * Belagerung nicht aufgehalten.  (Ansonsten wie oben bei Elfen anpassen).
@@ -953,7 +929,7 @@ static void allocate_resource(unit * u, const resource_type * rtype, int want)
     if (itype->rtype && (itype->rtype == get_resourcetype(R_IRON) || itype->rtype == rt_find("laen"))) {
         unit *u2;
         for (u2 = r->units; u2; u2 = u2->next) {
-            if (is_guard(u, GUARD_MINING)
+            if (is_guard(u)
                 && !fval(u2, UFL_ISNEW)
                 && u2->number && !alliedunit(u2, u->faction, HELP_GUARD)) {
                 ADDMSG(&u->faction->msgs,
@@ -1270,7 +1246,7 @@ static void create_item(unit * u, const item_type * itype, int want)
 {
     if (itype->construction && fval(itype->rtype, RTF_LIMITED)) {
 #if GUARD_DISABLES_PRODUCTION == 1
-        if (is_guarded(u->region, u, GUARD_PRODUCE)) {
+        if (is_guarded(u->region, u)) {
             cmistake(u, u->thisorder, 70, MSG_EVENT);
             return;
         }
@@ -1572,11 +1548,11 @@ static void buy(unit * u, request ** buyorders, struct order *ord)
     keyword_t kwd;
     const char *s;
 
-    if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
+    if (u->ship && is_guarded(r, u)) {
         cmistake(u, ord, 69, MSG_INCOME);
         return;
     }
-    if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
+    if (u->ship && is_guarded(r, u)) {
         cmistake(u, ord, 69, MSG_INCOME);
         return;
     }
@@ -1890,7 +1866,7 @@ static bool sell(unit * u, request ** sellorders, struct order *ord)
         caravan_bt = bt_find("caravan");
     }
 
-    if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
+    if (u->ship && is_guarded(r, u)) {
         cmistake(u, ord, 69, MSG_INCOME);
         return false;
     }
@@ -2605,7 +2581,7 @@ void entertain_cmd(unit * u, struct order *ord)
         cmistake(u, ord, 60, MSG_INCOME);
         return;
     }
-    if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
+    if (u->ship && is_guarded(r, u)) {
         cmistake(u, ord, 69, MSG_INCOME);
         return;
     }
@@ -2702,7 +2678,7 @@ static int do_work(unit * u, order * ord, request * o)
                 cmistake(u, ord, 60, MSG_INCOME);
             return -1;
         }
-        if (u->ship && is_guarded(r, u, GUARD_CREWS)) {
+        if (u->ship && is_guarded(r, u)) {
             if (ord)
                 cmistake(u, ord, 69, MSG_INCOME);
             return -1;
@@ -2839,7 +2815,7 @@ void tax_cmd(unit * u, struct order *ord, request ** taxorders)
         u->wants = _min(n * effskill(u, SK_TAXING, 0) * taxperlevel, max);
     }
 
-    u2 = is_guarded(r, u, GUARD_TAX);
+    u2 = is_guarded(r, u);
     if (u2) {
         ADDMSG(&u->faction->msgs,
             msg_feedback(u, ord, "region_guarded", "guard", u2));
@@ -2894,7 +2870,7 @@ void loot_cmd(unit * u, struct order *ord, request ** lootorders)
         return;
     }
 
-    u2 = is_guarded(r, u, GUARD_TAX);
+    u2 = is_guarded(r, u);
     if (u2) {
         ADDMSG(&u->faction->msgs,
             msg_feedback(u, ord, "region_guarded", "guard", u2));
diff --git a/src/guard.c b/src/guard.c
index da879fa53..86af55f85 100644
--- a/src/guard.c
+++ b/src/guard.c
@@ -20,27 +20,32 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include <platform.h>
 #include <kernel/config.h>
 #include "guard.h"
+#include "laws.h"
+#include "monster.h"
 
+#include <kernel/ally.h>
 #include <kernel/save.h>
 #include <kernel/unit.h>
 #include <kernel/faction.h>
 #include <kernel/race.h>
 #include <kernel/region.h>
 #include <kernel/building.h>
-#include <util/attrib.h>
 
 #include <assert.h>
 
-attrib_type at_guard = {
-    "guard",
-    DEFAULT_INIT,
-    DEFAULT_FINALIZE,
-    DEFAULT_AGE,
-    a_writeint,
-    a_readint,
-    NULL,
-    ATF_UNIQUE
-};
+guard_t can_start_guarding(const unit * u)
+{
+    if (u->status >= ST_FLEE || fval(u, UFL_FLEEING))
+        return E_GUARD_FLEEING;
+    /* Monster der Monsterpartei dürfen immer bewachen */
+    if (is_monsters(u->faction) || fval(u_race(u), RCF_UNARMEDGUARD))
+        return E_GUARD_OK;
+    if (!armedmen(u, true))
+        return E_GUARD_UNARMED;
+    if (IsImmune(u->faction))
+        return E_GUARD_NEWBIE;
+    return E_GUARD_OK;
+}
 
 void update_guards(void)
 {
@@ -51,97 +56,102 @@ void update_guards(void)
         for (u = r->units; u; u = u->next) {
             if (fval(u, UFL_GUARD)) {
                 if (can_start_guarding(u) != E_GUARD_OK) {
-                    setguard(u, GUARD_NONE);
-                }
-                else {
-                    attrib *a = a_find(u->attribs, &at_guard);
-                    if (a && a->data.i == (int)guard_flags(u)) {
-                        /* this is really rather not necessary */
-                        a_remove(&u->attribs, a);
-                    }
+                    setguard(u, false);
                 }
             }
         }
     }
 }
 
-unsigned int guard_flags(const unit * u)
+void setguard(unit * u, bool enabled)
 {
-    // TODO: this should be a property of the race, like race.guard_flags
-    static int rc_cache;
-    static const race *rc_elf, *rc_ent, *rc_ironkeeper;
-    const race *rc = u_race(u);
-    unsigned int flags =
-        GUARD_CREWS | GUARD_LANDING | GUARD_TRAVELTHRU | GUARD_TAX;
-    // TODO: configuration, not define
-#if GUARD_DISABLES_PRODUCTION == 1
-    flags |= GUARD_PRODUCE;
-#endif
-#if GUARD_DISABLES_RECRUIT == 1
-    flags |= GUARD_RECRUIT;
-#endif
-    if (rc_changed(&rc_cache)) {
-        rc_elf = get_race(RC_ELF);
-        rc_ent = get_race(RC_TREEMAN);
-        rc_ironkeeper = get_race(RC_IRONKEEPER);
+    if (!enabled) {
+        freset(u, UFL_GUARD);
+    } else {
+        assert(!fval(u, UFL_MOVED));
+        assert(u->status < ST_FLEE);
+        fset(u, UFL_GUARD);
+        fset(u->region, RF_GUARDED);
     }
-    if (rc == rc_elf) {
-        if (u->faction->race == u_race(u)) {
-            flags |= GUARD_TREES;
+}
+
+void guard(unit * u)
+{
+    setguard(u, true);
+}
+
+static bool is_guardian_u(const unit * guard, unit * u)
+{
+    if (guard->faction == u->faction)
+        return false;
+    if (is_guard(guard) == 0)
+        return false;
+    if (alliedunit(guard, u->faction, HELP_GUARD))
+        return false;
+    if (ucontact(guard, u))
+        return false;
+    if (!cansee(guard->faction, u->region, u, 0))
+        return false;
+    if (!(u_race(guard)->flags & RCF_FLY) && u_race(u)->flags & RCF_FLY)
+        return false;
+
+    return true;
+}
+
+static bool is_guardian_r(const unit * guard)
+{
+    if (guard->number == 0)
+        return false;
+    if (besieged(guard))
+        return false;
+
+    /* if region_owners exist then they may be guardians: */
+    if (guard->building && rule_region_owners() && guard == building_owner(guard->building)) {
+        faction *owner = region_get_owner(guard->region);
+        if (owner == guard->faction) {
+            building *bowner = largestbuilding(guard->region, &cmp_taxes, false);
+            if (bowner == guard->building) {
+                return true;
+            }
         }
     }
-    else if (rc == rc_ent) {
-        flags |= GUARD_TREES;
-    }
-    else if (rc == rc_ironkeeper) {
-        flags = GUARD_MINING;
-    }
-    return flags;
+
+    if ((guard->flags & UFL_GUARD) == 0)
+        return false;
+    return fval(u_race(guard), RCF_UNARMEDGUARD) || is_monsters(guard->faction) || (armedmen(guard, true) > 0);
 }
 
-void setguard(unit * u, unsigned int flags)
+bool is_guard(const struct unit * u)
 {
-    /* setzt die guard-flags der Einheit */
-    attrib *a = NULL;
-    assert(flags == 0 || !fval(u, UFL_MOVED));
-    assert(flags == 0 || u->status < ST_FLEE);
-    if (fval(u, UFL_GUARD)) {
-        a = a_find(u->attribs, &at_guard);
-    }
-    if (flags == GUARD_NONE) {
-        freset(u, UFL_GUARD);
-        if (a)
-            a_remove(&u->attribs, a);
-        return;
-    }
-    fset(u, UFL_GUARD);
-    fset(u->region, RF_GUARDED);
-    if (flags == guard_flags(u)) {
-        if (a)
-            a_remove(&u->attribs, a);
-    }
-    else {
-        if (!a)
-            a = a_add(&u->attribs, a_new(&at_guard));
-        a->data.i = (int)flags;
-    }
+    return is_guardian_r(u);
 }
 
-unsigned int getguard(const unit * u)
+unit *is_guarded(region * r, unit * u)
 {
-    attrib *a;
+    unit *u2;
+    int noguards = 1;
 
-    assert(fval(u, UFL_GUARD) || (u->building && u == building_owner(u->building))
-        || !"you're doing it wrong! check is_guard first");
-    a = a_find(u->attribs, &at_guard);
-    if (a) {
-        return (unsigned int)a->data.i;
+    if (!fval(r, RF_GUARDED)) {
+        return NULL;
     }
-    return guard_flags(u);
-}
 
-void guard(unit * u, unsigned int mask)
-{
-    unsigned int flags = guard_flags(u);
-    setguard(u, flags & mask);
+    /* at this point, u2 is the last unit we tested to
+    * be a guard (and failed), or NULL
+    * i is the position of the first free slot in the cache */
+
+    for (u2 = r->units; u2; u2 = u2->next) {
+        if (is_guardian_r(u2)) {
+            noguards = 0;
+            if (is_guardian_u(u2, u)) {
+                /* u2 is our guard. stop processing (we might have to go further next time) */
+                return u2;
+            }
+        }
+    }
+
+    if (noguards) {
+        /* you are mistaken, sir. there are no guards in these lands */
+        freset(r, RF_GUARDED);
+    }
+    return NULL;
 }
diff --git a/src/guard.h b/src/guard.h
index 564be61a2..4743230d3 100644
--- a/src/guard.h
+++ b/src/guard.h
@@ -7,18 +7,17 @@ extern "C" {
 #endif
 
     struct unit;
-
+    struct region;
+    
     typedef enum { E_GUARD_OK, E_GUARD_UNARMED, E_GUARD_NEWBIE, E_GUARD_FLEEING } guard_t;
 
-    extern struct attrib_type at_guard;
-
     guard_t can_start_guarding(const struct unit * u);
     void update_guards(void);
-    unsigned int guard_flags(const struct unit * u);
-    unsigned int getguard(const struct unit * u);
-    void setguard(struct unit * u, unsigned int flags);
+    void setguard(struct unit * u, bool enabled);
+    void guard(struct unit *u);
 
-    void guard(struct unit * u, unsigned int mask);
+    struct unit *is_guarded(struct region *r, struct unit *u);
+    bool is_guard(const struct unit *u);
 
 #ifdef __cplusplus
 }
diff --git a/src/guard.test.c b/src/guard.test.c
new file mode 100644
index 000000000..60e5453c6
--- /dev/null
+++ b/src/guard.test.c
@@ -0,0 +1,141 @@
+#include <platform.h>
+
+#include "guard.h"
+#include "laws.h"
+#include "monster.h"
+
+#include <kernel/config.h>
+#include <kernel/faction.h>
+#include <kernel/unit.h>
+#include <kernel/race.h>
+#include <kernel/item.h>
+#include <kernel/region.h>
+
+#include <limits.h>
+
+#include <CuTest.h>
+#include "tests.h"
+
+static void test_is_guarded(CuTest *tc) {
+    unit *u1, *u2;
+    region *r;
+    race *rc;
+
+    test_cleanup();
+    rc = rc_get_or_create("dragon");
+    rc->flags |= RCF_UNARMEDGUARD;
+    r = test_create_region(0, 0, 0);
+    u1 = test_create_unit(test_create_faction(0), r);
+    u2 = test_create_unit(test_create_faction(rc), r);
+    CuAssertPtrEquals(tc, 0, is_guarded(r, u1));
+    setguard(u2, true);
+    CuAssertPtrEquals(tc, u2, is_guarded(r, u1));
+    test_cleanup();
+}
+
+static void test_guard_unskilled(CuTest * tc)
+// TODO: it would be better to test armedmen()
+{
+    unit *u, *ug;
+    region *r;
+    item_type *itype;
+
+    test_setup();
+    itype = it_get_or_create(rt_get_or_create("sword"));
+    new_weapontype(itype, 0, 0.0, NULL, 0, 0, 0, SK_MELEE, 2);
+    r = test_create_region(0, 0, 0);
+    u = test_create_unit(test_create_faction(0), r);
+    ug = test_create_unit(test_create_faction(0), r);
+    i_change(&ug->items, itype, 1);
+    set_level(ug, SK_MELEE, 1);
+    setguard(ug, true);
+    CuAssertPtrEquals(tc, 0, is_guarded(r, u));
+    test_cleanup();
+}
+
+static void test_guard_armed(CuTest * tc)
+{
+    unit *u, *ug;
+    region *r;
+    item_type *itype;
+
+    test_setup();
+    itype = it_get_or_create(rt_get_or_create("sword"));
+    new_weapontype(itype, 0, 0.0, NULL, 0, 0, 0, SK_MELEE, 2);
+    r = test_create_region(0, 0, 0);
+    u = test_create_unit(test_create_faction(0), r);
+    ug = test_create_unit(test_create_faction(0), r);
+    i_change(&ug->items, itype, 1);
+    set_level(ug, SK_MELEE, 2);
+    setguard(ug, true);
+    CuAssertPtrEquals(tc, ug, is_guarded(r, u));
+    test_cleanup();
+}
+
+static void test_is_guard(CuTest * tc)
+{
+    unit *ug;
+    region *r;
+    item_type *itype;
+
+    test_setup();
+    itype = it_get_or_create(rt_get_or_create("sword"));
+    new_weapontype(itype, 0, 0.0, NULL, 0, 0, 0, SK_MELEE, 2);
+    r = test_create_region(0, 0, 0);
+    ug = test_create_unit(test_create_faction(0), r);
+    i_change(&ug->items, itype, 1);
+    set_level(ug, SK_MELEE, 2);
+    setguard(ug, true);
+    CuAssertIntEquals(tc, 1, armedmen(ug, false));
+    CuAssertTrue(tc, is_guard(ug));
+    set_level(ug, SK_MELEE, 1);
+    CuAssertIntEquals(tc, 0, armedmen(ug, false));
+    CuAssertTrue(tc, !is_guard(ug));
+    set_level(ug, SK_MELEE, 2);
+    CuAssertIntEquals(tc, 1, armedmen(ug, false));
+    CuAssertTrue(tc, is_guard(ug));
+    test_cleanup();
+}
+
+static void test_guard_unarmed(CuTest * tc)
+{
+    unit *u, *ug;
+    region *r;
+    race *rc;
+
+    test_setup();
+    rc = test_create_race("mountainguard");
+    rc->flags |= RCF_UNARMEDGUARD;
+    r = test_create_region(0, 0, 0);
+    u = test_create_unit(test_create_faction(0), r);
+    ug = test_create_unit(test_create_faction(rc), r);
+    setguard(ug, true);
+    CuAssertPtrEquals(tc, ug, is_guarded(r, u));
+    test_cleanup();
+}
+
+static void test_guard_monsters(CuTest * tc)
+{
+    unit *u, *ug;
+    region *r;
+
+    test_setup();
+    r = test_create_region(0, 0, 0);
+    u = test_create_unit(test_create_faction(0), r);
+    ug = test_create_unit(get_monsters(), r);
+    setguard(ug, true);
+    CuAssertPtrEquals(tc, ug, is_guarded(r, u));
+    test_cleanup();
+}
+
+CuSuite *get_guard_suite(void)
+{
+    CuSuite *suite = CuSuiteNew();
+    SUITE_ADD_TEST(suite, test_is_guarded);
+    SUITE_ADD_TEST(suite, test_is_guard);
+    SUITE_ADD_TEST(suite, test_guard_unskilled);
+    SUITE_ADD_TEST(suite, test_guard_armed);
+    SUITE_ADD_TEST(suite, test_guard_unarmed);
+    SUITE_ADD_TEST(suite, test_guard_monsters);
+    return suite;
+}
diff --git a/src/kernel/build.c b/src/kernel/build.c
index 6bc953241..f963797fd 100644
--- a/src/kernel/build.c
+++ b/src/kernel/build.c
@@ -113,7 +113,7 @@ static void destroy_road(unit * u, int nmax, struct order *ord)
         }
 
         for (u2 = r->units; u2; u2 = u2->next) {
-            if (u2->faction != u->faction && is_guard(u2, GUARD_TAX)
+            if (u2->faction != u->faction && is_guard(u2)
                 && cansee(u2->faction, u->region, u, 0)
                 && !alliedunit(u, u2->faction, HELP_GUARD)) {
                 cmistake(u, ord, 70, MSG_EVENT);
diff --git a/src/kernel/build.test.c b/src/kernel/build.test.c
index 9ea473725..b714f58f0 100644
--- a/src/kernel/build.test.c
+++ b/src/kernel/build.test.c
@@ -318,7 +318,7 @@ unit *test_create_guard(region *r, faction *f, race *rc) {
         f = test_create_faction(rc);
     }
     ug = test_create_unit(f, r);
-    guard(ug, GUARD_TAX);
+    setguard(ug, true);
 
     return ug;
 }
@@ -345,7 +345,7 @@ static void test_build_destroy_road_guard(CuTest *tc)
     CuAssertPtrEquals(tc, 0, test_find_messagetype(f->msgs, "destroy_road"));
 
     test_clear_messages(f);
-    guard(ug, GUARD_NONE);
+    setguard(ug, false);
 
     CuAssertIntEquals(tc, 0, destroy_cmd(u, ord));
     CuAssertIntEquals(tc, 99, rroad(r, D_EAST));
diff --git a/src/kernel/config.h b/src/kernel/config.h
index 74565e25e..8c46e4185 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -114,25 +114,6 @@ struct param;
 #define GF_PURE 64
     /* untranslated */
 
-#define GUARD_NONE 0
-#define GUARD_TAX 1
-    /* Verhindert Steuereintreiben */
-#define GUARD_MINING 2
-    /* Verhindert Bergbau */
-#define GUARD_TREES 4
-    /* Verhindert Waldarbeiten */
-#define GUARD_TRAVELTHRU 8
-    /* Blockiert Durchreisende */
-#define GUARD_LANDING 16
-    /* Verhindert Ausstieg + Weiterreise */
-#define GUARD_CREWS 32
-    /* Verhindert Unterhaltung auf Schiffen */
-#define GUARD_RECRUIT 64
-    /* Verhindert Rekrutieren */
-#define GUARD_PRODUCE 128
-    /* Verhindert Abbau von Resourcen mit RTF_LIMITED */
-#define GUARD_ALL 0xFFFF
-
     int maxworkingpeasants(const struct region *r);
     bool markets_module(void);
     int wage(const struct region *r, const struct faction *f,
diff --git a/src/kernel/item.h b/src/kernel/item.h
index c3b33070e..26231fa2e 100644
--- a/src/kernel/item.h
+++ b/src/kernel/item.h
@@ -108,7 +108,6 @@ extern "C" {
     typedef struct resource_limit {
         rlimit_limit limit;
         rlimit_produce produce;
-        unsigned int guard;         /* how to guard against theft */
         int value;
         resource_mod *modifiers;
     } resource_limit;
diff --git a/src/kernel/unit.c b/src/kernel/unit.c
index ad8377254..f43ef53bc 100644
--- a/src/kernel/unit.c
+++ b/src/kernel/unit.c
@@ -948,7 +948,7 @@ void move_unit(unit * u, region * r, unit ** ulist)
     if (!ulist)
         ulist = (&r->units);
     if (u->region) {
-        setguard(u, GUARD_NONE);
+        setguard(u, false);
         fset(u, UFL_MOVED);
         if (u->ship || u->building) {
             /* can_leave must be checked in travel_i */
diff --git a/src/kernel/xmlreader.c b/src/kernel/xmlreader.c
index e022effaf..640a28940 100644
--- a/src/kernel/xmlreader.c
+++ b/src/kernel/xmlreader.c
@@ -15,6 +15,7 @@ without prior permission by the authors of Eressea.
 #include "xmlreader.h"
 
 #include "building.h"
+#include "guard.h"
 #include "equipment.h"
 #include "item.h"
 #include "keyword.h"
@@ -1052,24 +1053,6 @@ static int parse_resources(xmlDocPtr doc)
             }
             xmlXPathFreeObject(result);
 
-            result = xmlXPathEvalExpression(BAD_CAST "guard", xpath);
-            if (result->nodesetval != NULL)
-                for (k = 0; k != result->nodesetval->nodeNr; ++k) {
-                    xmlNodePtr node = result->nodesetval->nodeTab[k];
-                    xmlChar *propFlag = xmlGetProp(node, BAD_CAST "flag");
-
-                    if (propFlag != NULL) {
-                        if (strcmp((const char *)propFlag, "logging") == 0) {
-                            rdata->guard |= GUARD_TREES;
-                        }
-                        else if (strcmp((const char *)propFlag, "mining") == 0) {
-                            rdata->guard |= GUARD_MINING;
-                        }
-                        xmlFree(propFlag);
-                    }
-                }
-            xmlXPathFreeObject(result);
-
             /* reading eressea/resources/resource/resourcelimit/function */
             result = xmlXPathEvalExpression(BAD_CAST "function", xpath);
             if (result->nodesetval != NULL)
diff --git a/src/laws.c b/src/laws.c
index bd0ae7b92..47cb4b13a 100755
--- a/src/laws.c
+++ b/src/laws.c
@@ -2556,7 +2556,7 @@ int guard_off_cmd(unit * u, struct order *ord)
     init_order(ord);
 
     if (getparam(u->faction->locale) == P_NOT) {
-        setguard(u, GUARD_NONE);
+        setguard(u, false);
     }
     return 0;
 }
@@ -2671,20 +2671,6 @@ int combatspell_cmd(unit * u, struct order *ord)
     return 0;
 }
 
-guard_t can_start_guarding(const unit * u)
-{
-    if (u->status >= ST_FLEE || fval(u, UFL_FLEEING))
-        return E_GUARD_FLEEING;
-    /* Monster der Monsterpartei dürfen immer bewachen */
-    if (is_monsters(u->faction) || fval(u_race(u), RCF_UNARMEDGUARD))
-        return E_GUARD_OK;
-    if (!armedmen(u, true))
-        return E_GUARD_UNARMED;
-    if (IsImmune(u->faction))
-        return E_GUARD_NEWBIE;
-    return E_GUARD_OK;
-}
-
 int guard_on_cmd(unit * u, struct order *ord)
 {
     assert(getkeyword(ord) == K_GUARD);
@@ -2712,7 +2698,7 @@ int guard_on_cmd(unit * u, struct order *ord)
         else {
             int err = can_start_guarding(u);
             if (err == E_GUARD_OK) {
-                guard(u, GUARD_ALL);
+                setguard(u, true);
             }
             else if (err == E_GUARD_UNARMED) {
                 ADDMSG(&u->faction->msgs, msg_feedback(u, ord, "unit_unarmed", ""));
@@ -4185,7 +4171,7 @@ int siege_cmd(unit * u, order * ord)
         return 80;
     }
 
-    if (!is_guard(u, GUARD_TRAVELTHRU)) {
+    if (!is_guard(u)) {
         /* abbruch, wenn die einheit nicht vorher die region bewacht - als
          * warnung fuer alle anderen! */
         cmistake(u, ord, 81, MSG_EVENT);
@@ -4499,7 +4485,7 @@ cansee(const faction * f, const region * r, const unit * u, int modifier)
         return false;
 
     /* simple visibility, just gotta have a unit in the region to see 'em */
-    if (is_guard(u, GUARD_ALL) != 0 || usiege(u) || u->building || u->ship) {
+    if (is_guard(u) || usiege(u) || u->building || u->ship) {
         return true;
     }
 
@@ -4538,7 +4524,7 @@ bool cansee_unit(const unit * u, const unit * target, int modifier)
     else {
         int n, rings, o;
 
-        if (is_guard(target, GUARD_ALL) != 0 || usiege(target) || target->building
+        if (is_guard(target) || usiege(target) || target->building
             || target->ship) {
             return true;
         }
@@ -4582,7 +4568,7 @@ cansee_durchgezogen(const faction * f, const region * r, const unit * u,
     else {
         int rings;
 
-        if (is_guard(u, GUARD_ALL) != 0 || usiege(u) || u->building || u->ship) {
+        if (is_guard(u) || usiege(u) || u->building || u->ship) {
             return true;
         }
 
diff --git a/src/laws.h b/src/laws.h
index 6c8633536..55020dc06 100755
--- a/src/laws.h
+++ b/src/laws.h
@@ -112,7 +112,6 @@ extern "C" {
     #define FORCE_LEAVE_ALL 2
     bool rule_force_leave(int flag);
     bool help_enter(struct unit *uo, struct unit *u);
-    guard_t can_start_guarding(const struct unit * u);
 
 #ifdef __cplusplus
 }
diff --git a/src/main.c b/src/main.c
index 58a15edc0..5fd154b23 100644
--- a/src/main.c
+++ b/src/main.c
@@ -262,27 +262,6 @@ static int setup_signal_handler(void)
 }
 #endif
 
-#undef CRTDBG
-#ifdef CRTDBG
-#include <crtdbg.h>
-void init_crtdbg(void)
-{
-#if (defined(_MSC_VER))
-    int flags = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-    if (memdebug == 1) {
-        flags |= _CRTDBG_CHECK_ALWAYS_DF;   /* expensive */
-    } else if (memdebug == 2) {
-        flags = (flags & 0x0000FFFF) | _CRTDBG_CHECK_EVERY_16_DF;
-    } else if (memdebug == 3) {
-        flags = (flags & 0x0000FFFF) | _CRTDBG_CHECK_EVERY_128_DF;
-    } else if (memdebug == 4) {
-        flags = (flags & 0x0000FFFF) | _CRTDBG_CHECK_EVERY_1024_DF;
-    }
-    _CrtSetDbgFlag(flags);
-#endif
-}
-#endif
-
 void locale_init(void)
 {
     setlocale(LC_CTYPE, "");
@@ -310,10 +289,6 @@ int main(int argc, char **argv)
 
     locale_init();
 
-#ifdef CRTDBG
-    init_crtdbg();
-#endif
-
     L = lua_init();
     game_init();
     bind_monsters(L);
diff --git a/src/monsters.c b/src/monsters.c
index 258175b43..3301f157a 100644
--- a/src/monsters.c
+++ b/src/monsters.c
@@ -202,7 +202,7 @@ static order *get_money_for_dragon(region * r, unit * udragon, int wanted)
     /* falls der drache launisch ist, oder das regionssilber knapp, greift er alle an
      * und holt sich Silber von Einheiten, vorausgesetzt er bewacht bereits */
     money = 0;
-    if (attacks && is_guard(udragon, GUARD_TAX)) {
+    if (attacks && is_guard(udragon)) {
         money += monster_attacks(udragon, true, true);
     }
 
@@ -735,7 +735,7 @@ void plan_monsters(faction * f)
                 setstatus(u, ST_FIGHT);
                 /* all monsters fight */
             }
-            if (attacking && (!r->land || is_guard(u, GUARD_TAX))) {
+            if (attacking && (!r->land || is_guard(u))) {
                 monster_attacks(u, true, false);
             }
 
diff --git a/src/monsters.test.c b/src/monsters.test.c
index 6797a9ce0..ca793891c 100644
--- a/src/monsters.test.c
+++ b/src/monsters.test.c
@@ -74,7 +74,7 @@ static void test_monsters_attack(CuTest * tc)
 
     create_monsters(&f, &f2, &u, &m);
 
-    guard(m, GUARD_TAX);
+    setguard(m, true);
 
     config_set("rules.monsters.attack_chance", "1");
 
@@ -111,7 +111,7 @@ static void test_monsters_waiting(CuTest * tc)
     unit *u, *m;
 
     create_monsters(&f, &f2, &u, &m);
-    guard(m, GUARD_TAX);
+    setguard(m, true);
     fset(m, UFL_ISNEW);
     monster_attacks(m, false, false);
     CuAssertPtrEquals(tc, 0, find_order("attack 1", m));
@@ -150,8 +150,8 @@ static void test_monsters_attack_not(CuTest * tc)
 
     create_monsters(&f, &f2, &u, &m);
 
-    guard(m, GUARD_TAX);
-    guard(u, GUARD_TAX);
+    setguard(m, true);
+    setguard(u, true);
 
     config_set("rules.monsters.attack_chance", "0");
 
@@ -170,7 +170,7 @@ static void test_dragon_attacks_the_rich(CuTest * tc)
     create_monsters(&f, &f2, &u, &m);
     init_resources();
 
-    guard(m, GUARD_TAX);
+    setguard(m, true);
     set_level(m, SK_WEAPONLESS, 10);
 
     rsetmoney(findregion(0, 0), 1);
diff --git a/src/move.c b/src/move.c
index 96a999f0d..78232480f 100644
--- a/src/move.c
+++ b/src/move.c
@@ -934,7 +934,7 @@ static unit *bewegung_blockiert_von(unit * reisender, region * r)
     if (fval(u_race(reisender), RCF_ILLUSIONARY))
         return NULL;
     for (u = r->units; u; u = u->next) {
-        if (is_guard(u, GUARD_TRAVELTHRU)) {
+        if (is_guard(u)) {
             int sk = effskill(u, SK_PERCEPTION, r);
             if (invisible(reisender, u) >= reisender->number)
                 continue;
@@ -977,82 +977,6 @@ static unit *bewegung_blockiert_von(unit * reisender, region * r)
     return NULL;
 }
 
-static bool is_guardian_u(const unit * guard, unit * u, unsigned int mask)
-{
-    if (guard->faction == u->faction)
-        return false;
-    if (is_guard(guard, mask) == 0)
-        return false;
-    if (alliedunit(guard, u->faction, HELP_GUARD))
-        return false;
-    if (ucontact(guard, u))
-        return false;
-    if (!cansee(guard->faction, u->region, u, 0))
-        return false;
-    if (!(u_race(guard)->flags & RCF_FLY) && u_race(u)->flags & RCF_FLY)
-        return false;
-
-    return true;
-}
-
-static bool is_guardian_r(const unit * guard)
-{
-    if (guard->number == 0)
-        return false;
-    if (besieged(guard))
-        return false;
-
-    /* if region_owners exist then they may be guardians: */
-    if (guard->building && rule_region_owners() && guard == building_owner(guard->building)) {
-        faction *owner = region_get_owner(guard->region);
-        if (owner == guard->faction) {
-            building *bowner = largestbuilding(guard->region, &cmp_taxes, false);
-            if (bowner == guard->building) {
-                return true;
-            }
-        }
-    }
-
-    if ((guard->flags & UFL_GUARD) == 0)
-        return false;
-    return armedmen(guard, true) > 0 || fval(u_race(guard), RCF_UNARMEDGUARD);
-}
-
-bool is_guard(const struct unit * u, unsigned int mask)
-{
-    return is_guardian_r(u) && (getguard(u) & mask) != 0;
-}
-
-unit *is_guarded(region * r, unit * u, unsigned int mask)
-{
-    unit *u2;
-    int noguards = 1;
-
-    if (!fval(r, RF_GUARDED)) {
-        return NULL;
-    }
-
-    /* at this point, u2 is the last unit we tested to
-     * be a guard (and failed), or NULL
-     * i is the position of the first free slot in the cache */
-
-    for (u2 = r->units; u2; u2 = u2->next) {
-        if (is_guardian_r(u2)) {
-            noguards = 0;
-            if (is_guardian_u(u2, u, mask)) {
-                /* u2 is our guard. stop processing (we might have to go further next time) */
-                return u2;
-            }
-        }
-    }
-
-    if (noguards) {
-        /* you are mistaken, sir. there are no guards in these lands */
-        freset(r, RF_GUARDED);
-    }
-    return NULL;
-}
-
 bool move_blocked(const unit * u, const region * r, const region * r2)
 {
     connection *b;
@@ -1691,7 +1615,7 @@ static const region_list *travel_route(unit * u,
         /* the unit has moved at least one region */
         int walkmode;
 
-        setguard(u, GUARD_NONE);
+        setguard(u, false);
         cycle_route(ord, u, steps);
 
         if (mode == TRAVEL_RUNNING) {
@@ -1719,7 +1643,7 @@ static const region_list *travel_route(unit * u,
         /* make orders for the followers */
     }
     fset(u, UFL_LONGACTION | UFL_NOTMOVING);
-    setguard(u, GUARD_NONE);
+    setguard(u, false);
     assert(u->region == current);
     return iroute;
 }
@@ -2217,7 +2141,7 @@ static void travel(unit * u, region_list ** routep)
                 sh = NULL;
         }
         if (sh) {
-            unit *guard = is_guarded(r, u, GUARD_LANDING);
+            unit *guard = is_guarded(r, u);
             if (guard) {
                 ADDMSG(&u->faction->msgs, msg_feedback(u, u->thisorder,
                     "region_guarded", "guard", guard));
diff --git a/src/move.h b/src/move.h
index 70dddbb0b..6363fe2f9 100644
--- a/src/move.h
+++ b/src/move.h
@@ -60,8 +60,6 @@ extern "C" {
     int personcapacity(const struct unit *u);
     void movement(void);
     void run_to(struct unit *u, struct region *to);
-    struct unit *is_guarded(struct region *r, struct unit *u, unsigned int mask);
-    bool is_guard(const struct unit *u, unsigned int mask);
     int enoughsailors(const struct ship *sh, int sumskill);
     bool canswim(struct unit *u);
     bool canfly(struct unit *u);
diff --git a/src/move.test.c b/src/move.test.c
index 2ce9cccda..5c89166c8 100644
--- a/src/move.test.c
+++ b/src/move.test.c
@@ -2,7 +2,6 @@
 #include <stdlib.h>
 #include "move.h"
 
-#include "guard.h"
 #include "keyword.h"
 
 #include <kernel/config.h>
@@ -201,30 +200,6 @@ static void test_walkingcapacity(CuTest *tc) {
     test_cleanup();
 }
 
-static void test_is_guarded(CuTest *tc) {
-    unit *u1, *u2;
-    region *r;
-    race *rc;
-
-    test_cleanup();
-    rc = rc_get_or_create("dragon");
-    rc->flags |= RCF_UNARMEDGUARD;
-    r = test_create_region(0, 0, 0);
-    u1 = test_create_unit(test_create_faction(0), r);
-    u2 = test_create_unit(test_create_faction(rc), r);
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_TRAVELTHRU));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_PRODUCE));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_TREES));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_MINING));
-    guard(u2, GUARD_MINING | GUARD_PRODUCE);
-    CuAssertIntEquals(tc, GUARD_CREWS | GUARD_LANDING | GUARD_TRAVELTHRU | GUARD_TAX | GUARD_PRODUCE | GUARD_RECRUIT, guard_flags(u2));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_TRAVELTHRU));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_TREES));
-    CuAssertPtrEquals(tc, 0, is_guarded(r, u1, GUARD_MINING));
-    CuAssertPtrEquals(tc, u2, is_guarded(r, u1, GUARD_PRODUCE));
-    test_cleanup();
-}
-
 static void test_ship_trails(CuTest *tc) {
     ship *sh;
     region *r1, *r2, *r3;
@@ -526,7 +501,6 @@ CuSuite *get_move_suite(void)
     SUITE_ADD_TEST(suite, test_ship_has_harbormaster_contact);
     SUITE_ADD_TEST(suite, test_ship_has_harbormaster_ally);
     SUITE_ADD_TEST(suite, test_ship_has_harbormaster_same_faction);
-    SUITE_ADD_TEST(suite, test_is_guarded);
     SUITE_ADD_TEST(suite, test_ship_trails);
     SUITE_ADD_TEST(suite, test_age_trails);
     SUITE_ADD_TEST(suite, test_ship_no_overload);
diff --git a/src/report.c b/src/report.c
index c7093da73..e9a0681ba 100644
--- a/src/report.c
+++ b/src/report.c
@@ -1671,7 +1671,7 @@ static void guards(stream *out, const region * r, const faction * see)
     /* Bewachung */
 
     for (u = r->units; u; u = u->next) {
-        if (is_guard(u, GUARD_ALL) != 0) {
+        if (is_guard(u) != 0) {
             faction *f = u->faction;
             faction *fv = visible_faction(see, u);
 
diff --git a/src/reports.c b/src/reports.c
index cfdc28bd2..a136645de 100644
--- a/src/reports.c
+++ b/src/reports.c
@@ -582,7 +582,7 @@ size_t size)
             }
         }
     }
-    if (is_guard(u, GUARD_ALL) != 0) {
+    if (is_guard(u)) {
         bufp = STRLCPY(bufp, ", ", size);
         bufp = STRLCPY(bufp, LOC(f->locale, "unit_guards"), size);
     }
diff --git a/src/settings.h b/src/settings.h
index c44bc0f2a..ecf3df9f2 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -10,10 +10,6 @@
  without prior permission by the authors of Eressea.
  */
 
-/*
- * Contains defines for the "free" game (Eressea) .
- * Include this file from settings.h to make eressea work.
- */
 #define ENTERTAINFRACTION 20
 #define TEACHDIFFERENCE 2
 #define GUARD_DISABLES_RECRUIT 1
diff --git a/src/spells.c b/src/spells.c
index 7d300c5e1..e4ca75fbc 100644
--- a/src/spells.c
+++ b/src/spells.c
@@ -2196,7 +2196,7 @@ static int sp_ironkeeper(castorder * co)
 
     /*keeper->age = cast_level + 2; */
     setstatus(keeper, ST_AVOID);  /* kaempft nicht */
-    guard(keeper, GUARD_MINING);
+    setguard(keeper, true);
     fset(keeper, UFL_ISNEW);
     /* Parteitarnen, damit man nicht sofort weiß, wer dahinter steckt */
     if (rule_stealth_anon()) {
@@ -2386,7 +2386,6 @@ void patzer_peasantmob(const castorder * co)
             create_unit(r, f, n, get_race(RC_PEASANT), 0, LOC(f->locale, "angry_mob"),
             NULL);
         fset(u, UFL_ISNEW);
-        /* guard(u, GUARD_ALL);  hier zu frueh! Befehl BEWACHE setzten */
         addlist(&u->orders, create_order(K_GUARD, lang, NULL));
         set_order(&u->thisorder, default_order(lang));
         a = a_new(&at_unitdissolve);
@@ -3746,7 +3745,7 @@ static int sp_rallypeasantmob(castorder * co)
             rsetpeasants(r, rpeasants(r) + u->number);
             rsetmoney(r, rmoney(r) + get_money(u));
             set_money(u, 0);
-            setguard(u, GUARD_NONE);
+            setguard(u, false);
             set_number(u, 0);
             erfolg = cast_level;
         }
@@ -3813,7 +3812,7 @@ static int sp_raisepeasantmob(castorder * co)
         create_unit(r, monsters, n, get_race(RC_PEASANT), 0, LOC(monsters->locale,
         "furious_mob"), NULL);
     fset(u, UFL_ISNEW);
-    guard(u, GUARD_ALL);
+    setguard(u, true);
     a = a_new(&at_unitdissolve);
     a->data.ca[0] = 1;            /* An rpeasants(r). */
     a->data.ca[1] = 15;           /* 15% */
diff --git a/src/spells/combatspells.c b/src/spells/combatspells.c
index bcbbb1b52..bf122729a 100644
--- a/src/spells/combatspells.c
+++ b/src/spells/combatspells.c
@@ -1437,7 +1437,7 @@ int sp_denyattack(struct castorder * co)
         leave(mage, false);
     }
     /* und bewachen nicht */
-    setguard(mage, GUARD_NONE);
+    setguard(mage, false);
     /* irgendwie den langen befehl sperren */
     /* fset(fi, FIG_ATTACKED); */
 
@@ -1800,7 +1800,7 @@ int sp_undeadhero(struct castorder * co)
                     unit_setinfo(u, NULL);
                 }
                 setstatus(u, du->status);
-                setguard(u, GUARD_NONE);
+                setguard(u, false);
                 for (ilist = &du->items; *ilist;) {
                     item *itm = *ilist;
                     int loot = itm->number * j / du->number;
diff --git a/src/spy.c b/src/spy.c
index 9b8fe4601..01a419aba 100644
--- a/src/spy.c
+++ b/src/spy.c
@@ -463,7 +463,7 @@ static void sink_ship(region * r, ship * sh, unit * saboteur)
                 }
                 leave_ship(u);
                 if (r != safety) {
-                    setguard(u, GUARD_NONE);
+                    setguard(u, false);
                 }
                 while (u->items) {
                     i_remove(&u->items, u->items);
diff --git a/src/test_eressea.c b/src/test_eressea.c
index 002d9a0cb..39ec90be6 100644
--- a/src/test_eressea.c
+++ b/src/test_eressea.c
@@ -111,6 +111,7 @@ int RunAllTests(int argc, char *argv[])
     ADD_SUITE(ally);
     ADD_SUITE(messages);
     /* gamecode */
+    ADD_SUITE(guard);
     ADD_SUITE(report);
     ADD_SUITE(creport);
     ADD_SUITE(prefix);