diff --git a/src/battle.c b/src/battle.c
index 835917e62..a0e03f1f9 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -104,8 +104,6 @@ const troop no_troop = { 0, 0 };
 #define LOOT_KEEPLOOT      (1<<4)
 
 #define DAMAGE_CRITICAL      (1<<0)
-#define DAMAGE_MELEE_BONUS   (1<<1)
-#define DAMAGE_MISSILE_BONUS (1<<2)   /* deprecated */
 #define DAMAGE_SKILL_BONUS   (1<<4)
 
 static int max_turns;
@@ -117,7 +115,7 @@ static int flee_chance_skill_bonus;
 static int skill_formula;
 static int rule_cavalry_skill;
 static int rule_population_damage;
-static int rule_hero_speed;
+static unsigned char rule_hero_speed;
 static bool rule_anon_battle;
 static bool rule_igjarjuk_curse;
 static int rule_goblin_bonus;
@@ -139,7 +137,7 @@ static void init_rules(void)
     rule_nat_armor = config_get_int("rules.combat.nat_armor", 0);
     rule_tactics_formula = config_get_int("rules.tactics.formula", 0);
     rule_goblin_bonus = config_get_int("rules.combat.goblinbonus", 10);
-    rule_hero_speed = config_get_int("rules.combat.herospeed", 10);
+    rule_hero_speed = (unsigned char)config_get_int("rules.combat.herospeed", 10);
     rule_population_damage = config_get_int("rules.combat.populationdamage", 20);
     rule_anon_battle = config_get_int("rules.stealth.anon_battle", 1) != 0;
     rule_igjarjuk_curse = config_get_int("rules.combat.igjarjuk_curse", 0) != 0;
@@ -157,12 +155,6 @@ static void init_rules(void)
     if (config_get_int("rules.combat.critical", 1)) {
         rule_damage |= DAMAGE_CRITICAL;
     }
-    if (config_get_int("rules.combat.melee_bonus", 1)) {
-        rule_damage |= DAMAGE_MELEE_BONUS;
-    }
-    if (config_get_int("rules.combat.missile_bonus", 1)) { /* deprecated */
-        rule_damage |= DAMAGE_MISSILE_BONUS;
-    }
     if (config_get_int("rules.combat.skill_bonus", 1)) {
         rule_damage |= DAMAGE_SKILL_BONUS;
     }
@@ -1304,9 +1296,7 @@ terminate(troop dt, troop at, int type, const char *damage_formula, bool missile
 
         if (awtype == NULL || !fval(awtype, WTF_MISSILE)) {
             /* melee bonus */
-            if (rule_damage & DAMAGE_MELEE_BONUS) {
-                damage += af->person[at.index].damage;
-            }
+            damage += af->person[at.index].damage;
         }
 
         /* Skilldifferenzbonus */
@@ -3158,7 +3148,7 @@ fighter *make_fighter(battle * b, unit * u, side * s1, bool attack)
             fig->person[i].hp++;
 
         if (i < speeded)
-            fig->person[i].speed = speed;
+            fig->person[i].speed = (unsigned char) speed;
         else
             fig->person[i].speed = 1;
 
diff --git a/src/battle.h b/src/battle.h
index 0ce76bfea..83bcaf09a 100644
--- a/src/battle.h
+++ b/src/battle.h
@@ -81,9 +81,9 @@ extern "C" {
         int nsides;
         struct selist *meffects;
         int max_tactics;
-        int turn;
+        unsigned char turn;
+        signed char keeploot; /* keep (50 + keeploot) percent of items as loot */
         bool has_tactics_turn;
-        int keeploot;
         bool reelarrow;
         int alive;
         struct {
@@ -153,13 +153,13 @@ extern "C" {
         int catmsg;                 /* Merkt sich, ob Katapultmessage schon generiert. */
         struct person {
             int hp;                   /* Trefferpunkte der Personen */
-            int attack;
-            int defense;
-            int damage;
             int flags;
-            int speed;
-            int reload;
-            int last_action;
+            int attack;  /* weapon skill bonus for attacker */
+            int defense; /* weapon skill bonus for defender */
+            char damage;  /* bonus damage for melee attacks (e.g. troll belt) */
+            unsigned char speed;
+            unsigned char reload;
+            unsigned char last_action;
             struct weapon *missile;   /* missile weapon */
             struct weapon *melee;     /* melee weapon */
         } *person;
diff --git a/src/exparse.c b/src/exparse.c
index 4160b32ba..a9c21b025 100644
--- a/src/exparse.c
+++ b/src/exparse.c
@@ -280,7 +280,7 @@ static void handle_weapon(parseinfo *pi, const XML_Char *el, const XML_Char **at
             wtype->defmod = xml_int(attr[i + 1]);
         }
         else if (xml_strequal(attr[i], "reload")) {
-            wtype->reload = xml_int(attr[i + 1]);
+            wtype->reload = (unsigned char) xml_int(attr[i + 1]);
         }
         else if (xml_strequal(attr[i], "skill")) {
             wtype->skill = findskill(attr[i + 1]);
diff --git a/src/kernel/item.c b/src/kernel/item.c
index 1533d65bc..0d2764412 100644
--- a/src/kernel/item.c
+++ b/src/kernel/item.c
@@ -260,7 +260,7 @@ luxury_type *new_luxurytype(item_type * itype, int price)
 
 weapon_type *new_weapontype(item_type * itype,
     int wflags, variant magres, const char *damage[], int offmod, int defmod,
-    int reload, skill_t sk)
+    unsigned char reload, skill_t sk)
 {
     weapon_type *wtype;
 
diff --git a/src/kernel/item.h b/src/kernel/item.h
index 0b90b7b1e..46b27505f 100644
--- a/src/kernel/item.h
+++ b/src/kernel/item.h
@@ -169,7 +169,7 @@ extern "C" {
         int offmod;
         int defmod;
         variant magres;
-        int reload;                 /* time to reload this weapon */
+        unsigned char reload;                 /* time to reload this weapon */
         weapon_mod *modifiers;
         /* --- functions --- */
         bool(*attack) (const struct troop *, const struct weapon_type *,
@@ -208,7 +208,7 @@ extern "C" {
     item_type *it_get_or_create(resource_type *rtype);
     luxury_type *new_luxurytype(item_type * itype, int price);
     weapon_type *new_weapontype(item_type * itype, int wflags,
-        variant magres, const char *damage[], int offmod, int defmod, int reload,
+        variant magres, const char *damage[], int offmod, int defmod, unsigned char reload,
         skill_t sk);
     void free_wtype(struct weapon_type *wtype);
     armor_type *new_armortype(item_type * itype, double penalty,
diff --git a/src/kernel/unit.h b/src/kernel/unit.h
index 863dccd13..c77cfdb7a 100644
--- a/src/kernel/unit.h
+++ b/src/kernel/unit.h
@@ -54,7 +54,7 @@ extern "C" {
     /* Flags, die gespeichert werden sollen: */
 #define UFL_SAVEMASK (UFL_DEFENDER|UFL_MOVED|UFL_NOAID|UFL_ANON_FACTION|UFL_LOCKED|UFL_HUNGER|UFL_TAKEALL|UFL_GUARD|UFL_STEALTH|UFL_GROUP|UFL_HERO)
 
-#define UNIT_MAXSIZE 50000
+#define UNIT_MAXSIZE 128 * 1024
     extern int maxheroes(const struct faction *f);
     extern int countheroes(const struct faction *f);
 
diff --git a/src/move.c b/src/move.c
index 0fc6f6411..d33987d54 100644
--- a/src/move.c
+++ b/src/move.c
@@ -501,7 +501,7 @@ static double overload(const region * r, ship * sh)
         double ovl;
 
         getshipweight(sh, &n, &p);
-        ovl = n / (double)sh->type->cargo;
+        ovl = n / (double)(sh->type->cargo * sh->number);
         if (mcabins) {
             ovl = fmax(ovl, p / (double)mcabins);
         }
@@ -746,7 +746,7 @@ double damage_overload(double overload)
 }
 
 /* message to all factions in ship, start from firstu, end before lastu (may be NULL) */
-static void msg_to_ship_inmates(ship *sh, unit **firstu, unit **lastu, message *msg) {
+static void msg_to_passengers(ship *sh, unit **firstu, unit **lastu, message *msg) {
     unit *u, *shipfirst = NULL;
     for (u = *firstu; u != *lastu; u = u->next) {
         if (u->ship == sh) {
@@ -836,19 +836,19 @@ static void drifting_ships(region * r)
 
             if (rnext && firstu) {
                 message *msg = msg_message("ship_drift", "ship dir", sh, dir);
-                msg_to_ship_inmates(sh, &firstu, &lastu, msg);
+                msg_to_passengers(sh, &firstu, &lastu, msg);
             }
 
             fset(sh, SF_DRIFTED);
             if (ovl >= overload_start()) {
                 damage_ship(sh, damage_overload(ovl));
-                msg_to_ship_inmates(sh, &firstu, &lastu, msg_message("massive_overload", "ship", sh));
+                msg_to_passengers(sh, &firstu, &lastu, msg_message("massive_overload", "ship", sh));
             }
             else {
                 damage_ship(sh, damage_drift);
             }
             if (sh->damage >= sh->size * DAMAGE_SCALE) {
-                msg_to_ship_inmates(sh, &firstu, &lastu, msg_message("shipsink", "ship", sh));
+                msg_to_passengers(sh, &firstu, &lastu, msg_message("shipsink", "ship", sh));
                 sink_ship(sh);
                 remove_ship(shp, sh);
             }
@@ -1683,12 +1683,13 @@ bool can_takeoff(const ship * sh, const region * from, const region * to)
     return true;
 }
 
-static void sail(unit * u, order * ord, region_list ** routep, bool drifting)
+static void sail(unit * u, order * ord, bool drifting)
 {
+    region_list *route = NULL;
     region *starting_point = u->region;
     region *current_point, *last_point;
     int k, step = 0;
-    region_list **iroute = routep;
+    region_list **iroute = &route;
     ship *sh = u->ship;
     faction *f = u->faction;
     region *next_point = NULL;
@@ -1698,10 +1699,6 @@ static void sail(unit * u, order * ord, region_list ** routep, bool drifting)
     int lighthouse_div = config_get_int("rules.storm.lighthouse.divisor", 0);
     const char *token = getstrtoken();
 
-    if (routep) {
-        *routep = NULL;
-    }
-
     error = movewhere(u, token, starting_point, &next_point);
     if (error) {
         message *msg = movement_error(u, token, ord, error);
@@ -1940,7 +1937,7 @@ static void sail(unit * u, order * ord, region_list ** routep, bool drifting)
         if (fval(u, UFL_FOLLOWING))
             caught_target(current_point, u);
 
-        move_ship(sh, starting_point, current_point, routep ? *routep : NULL);
+        move_ship(sh, starting_point, current_point, route);
 
         /* Hafengebuehren ? */
 
@@ -1982,6 +1979,7 @@ static void sail(unit * u, order * ord, region_list ** routep, bool drifting)
             }
         }
     }
+    free_regionlist(route);
 }
 
 /* Segeln, Wandern, Reiten
@@ -2088,14 +2086,12 @@ static const region_list *travel_i(unit * u, const region_list * route_begin,
 /** traveling without ships
  * walking, flying or riding units use this function
  */
-static void travel(unit * u, order *ord, region_list ** routep)
+static void travel(unit * u, order *ord)
 {
-    region *r = u->region;
-    region_list *route_begin;
-    follower *followers = NULL;
+    region_list *route = NULL;
 
-    assert(routep);
-    *routep = NULL;
+    region *r = u->region;
+    follower *followers = NULL;
 
     /* a few pre-checks that need not be done for each step: */
     if (!fval(r->terrain, SEA_REGION)) {
@@ -2131,12 +2127,10 @@ static void travel(unit * u, order *ord, region_list ** routep)
         return;
     }
 
-    make_route(u, ord, routep);
-    route_begin = *routep;
-
-    if (route_begin) {
+    make_route(u, ord, &route);
+    if (route) {
         /* und ab die post: */
-        travel_i(u, route_begin, NULL, ord, TRAVEL_NORMAL, &followers);
+        travel_i(u, route, NULL, ord, TRAVEL_NORMAL, &followers);
 
         /* followers */
         while (followers != NULL) {
@@ -2157,34 +2151,30 @@ static void travel(unit * u, order *ord, region_list ** routep)
                 follow_order = create_order(K_FOLLOW, lang, "%s %i",
                     s, ut->no);
 
-                route_end = reroute(uf, route_begin, route_end);
-                travel_i(uf, route_begin, route_end, follow_order, TRAVEL_FOLLOWING,
+                route_end = reroute(uf, route, route_end);
+                travel_i(uf, route, route_end, follow_order, TRAVEL_FOLLOWING,
                     &followers);
                 caught_target(uf->region, uf);
                 free_order(follow_order);
             }
         }
+        free_regionlist(route);
     }
 }
 
 void move_cmd(unit * u, order * ord)
 {
-    region_list *route = NULL;
-
     assert(u->number);
     if (u->ship && u == ship_owner(u->ship)) {
         bool drifting = (getkeyword(ord) == K_MOVE);
-        sail(u, ord, &route, drifting);
+        sail(u, ord, drifting);
     }
     else {
-        travel(u, ord, &route);
+        travel(u, ord);
     }
 
     fset(u, UFL_LONGACTION | UFL_NOTMOVING);
     set_order(&u->thisorder, NULL);
-
-    if (route != NULL)
-        free_regionlist(route);
 }
 
 static void age_traveldir(region * r)
diff --git a/src/spells/combatspells.c b/src/spells/combatspells.c
index f4b8b6954..dea37345b 100644
--- a/src/spells/combatspells.c
+++ b/src/spells/combatspells.c
@@ -1378,7 +1378,7 @@ int sp_keeploot(struct castorder * co)
     message_all(b, m);
     msg_release(m);
 
-    b->keeploot = (int)fmax(25, b->keeploot + 5 * power);
+    b->keeploot = (signed char) fmax(25, b->keeploot + 5 * power);
 
     return level;
 }