diff --git a/campaign/campaign_main/campaign_2_1.py b/campaign/campaign_main/campaign_2_1.py
index 04950bd7f..f825deb13 100644
--- a/campaign/campaign_main/campaign_2_1.py
+++ b/campaign/campaign_main/campaign_2_1.py
@@ -32,8 +32,8 @@ A4, B4, C4, D4, E4, F4, \
 
 
 class Config:
-    FLEET_2 = 0
-    SUBMARINE = 0
+    FLEET_BOSS = 1
+
     INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
         'height': (120, 255 - 40),
         'width': (1.5, 10),
@@ -59,7 +59,7 @@ class Campaign(CampaignBase):
     def battle_2(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(D4):
+        if not self.check_accessibility(D4, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_2_2.py b/campaign/campaign_main/campaign_2_2.py
index 40b4a502d..25b44806e 100644
--- a/campaign/campaign_main/campaign_2_2.py
+++ b/campaign/campaign_main/campaign_2_2.py
@@ -48,7 +48,7 @@ class Campaign(CampaignBase):
     def battle_3(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(D1):
+        if not self.check_accessibility(D1, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_2_3.py b/campaign/campaign_main/campaign_2_3.py
index e5458632f..69c90455e 100644
--- a/campaign/campaign_main/campaign_2_3.py
+++ b/campaign/campaign_main/campaign_2_3.py
@@ -48,7 +48,7 @@ class Campaign(CampaignBase):
     def battle_3(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(E1):
+        if not self.check_accessibility(E1, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_2_4.py b/campaign/campaign_main/campaign_2_4.py
index f6f1fff85..785496dde 100644
--- a/campaign/campaign_main/campaign_2_4.py
+++ b/campaign/campaign_main/campaign_2_4.py
@@ -41,7 +41,7 @@ class Campaign(CampaignBase):
         return self.battle_default()
 
     def battle_3(self):
-        if not self.check_accessibility(G1):
+        if not self.check_accessibility(G1, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_3_1.py b/campaign/campaign_main/campaign_3_1.py
index 68f638cfc..29980b8b1 100644
--- a/campaign/campaign_main/campaign_3_1.py
+++ b/campaign/campaign_main/campaign_3_1.py
@@ -33,8 +33,8 @@ A4, B4, C4, D4, E4, F4, G4, \
 
 
 class Config:
-    FLEET_2 = 0
-    SUBMARINE = 0
+    FLEET_BOSS = 1
+
     MAP_MYSTERY_HAS_CARRIER = True
     INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
         'height': (120, 255 - 40),
@@ -61,7 +61,7 @@ class Campaign(CampaignBase):
     def battle_3(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(G2):
-            return self.battle_default()
+        if not self.check_accessibility(G2, fleet='boss'):
+            return self.fleet_boss.battle_default()
 
         return self.clear_boss()
diff --git a/campaign/campaign_main/campaign_3_2.py b/campaign/campaign_main/campaign_3_2.py
index e14eb2697..7d35d6e33 100644
--- a/campaign/campaign_main/campaign_3_2.py
+++ b/campaign/campaign_main/campaign_3_2.py
@@ -45,7 +45,7 @@ class Campaign(CampaignBase):
     def battle_3(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(H1):
+        if not self.check_accessibility(H1, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_3_3.py b/campaign/campaign_main/campaign_3_3.py
index 21b343f44..dbddd0c7f 100644
--- a/campaign/campaign_main/campaign_3_3.py
+++ b/campaign/campaign_main/campaign_3_3.py
@@ -47,7 +47,7 @@ class Campaign(CampaignBase):
     def battle_3(self):
         self.clear_all_mystery()
 
-        if not self.check_accessibility(A4):
+        if not self.check_accessibility(A4, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_3_4.py b/campaign/campaign_main/campaign_3_4.py
index 47a8c83e2..d1348f4a9 100644
--- a/campaign/campaign_main/campaign_3_4.py
+++ b/campaign/campaign_main/campaign_3_4.py
@@ -50,10 +50,10 @@ class Campaign(CampaignBase):
         return self.battle_default()
 
     def battle_3(self):
-        if not self.check_accessibility(H3):
+        if not self.check_accessibility(H3, fleet='boss'):
             return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
 
     def handle_boss_appear_refocus(self):
         for data in self.map.spawn_data:
diff --git a/campaign/campaign_main/campaign_4_1.py b/campaign/campaign_main/campaign_4_1.py
index d325662e6..edf3f7f47 100644
--- a/campaign/campaign_main/campaign_4_1.py
+++ b/campaign/campaign_main/campaign_4_1.py
@@ -39,8 +39,8 @@ A6, B6, C6, D6, E6, F6, \
 
 
 class Config:
-    FLEET_2 = 0
-    SUBMARINE = 0
+    FLEET_BOSS = 1
+
     MAP_MYSTERY_HAS_CARRIER = True
     INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
         'height': (120, 255 - 40),
@@ -72,7 +72,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_4_2.py b/campaign/campaign_main/campaign_4_2.py
index 419635618..8139fa6c2 100644
--- a/campaign/campaign_main/campaign_4_2.py
+++ b/campaign/campaign_main/campaign_4_2.py
@@ -58,7 +58,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_4_3.py b/campaign/campaign_main/campaign_4_3.py
index de0c507f6..4d6ef8aa5 100644
--- a/campaign/campaign_main/campaign_4_3.py
+++ b/campaign/campaign_main/campaign_4_3.py
@@ -54,7 +54,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_4_4.py b/campaign/campaign_main/campaign_4_4.py
index 6e1714e61..7c7389318 100644
--- a/campaign/campaign_main/campaign_4_4.py
+++ b/campaign/campaign_main/campaign_4_4.py
@@ -65,10 +65,10 @@ class Campaign(CampaignBase):
     def battle_4(self):
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 if self.clear_roadblocks([road_main]):
                     return True
                 if self.clear_potential_roadblocks([road_main]):
                     return True
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_5_1.py b/campaign/campaign_main/campaign_5_1.py
index ada07b882..5c66dc724 100644
--- a/campaign/campaign_main/campaign_5_1.py
+++ b/campaign/campaign_main/campaign_5_1.py
@@ -41,9 +41,9 @@ A6, B6, C6, D6, E6, F6, G6, H6, \
 
 
 class Config:
-    FLEET_2 = 0
-    SUBMARINE = 0
+    FLEET_BOSS = 1
     MAP_MYSTERY_HAS_CARRIER = True
+
     INTERNAL_LINES_FIND_PEAKS_PARAMETERS = {
         'height': (120, 255 - 40),
         'width': (1.5, 10),
@@ -71,7 +71,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_5_2.py b/campaign/campaign_main/campaign_5_2.py
index cd9e34a55..7a730f51c 100644
--- a/campaign/campaign_main/campaign_5_2.py
+++ b/campaign/campaign_main/campaign_5_2.py
@@ -51,7 +51,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_5_3.py b/campaign/campaign_main/campaign_5_3.py
index 1cc464d0a..1911057c4 100644
--- a/campaign/campaign_main/campaign_5_3.py
+++ b/campaign/campaign_main/campaign_5_3.py
@@ -51,7 +51,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.battle_default()
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_5_4.py b/campaign/campaign_main/campaign_5_4.py
index b97e959d4..43c220b92 100644
--- a/campaign/campaign_main/campaign_5_4.py
+++ b/campaign/campaign_main/campaign_5_4.py
@@ -62,10 +62,10 @@ class Campaign(CampaignBase):
     def battle_4(self):
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0]):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 if self.clear_roadblocks([road_center]):
                     return True
                 if self.clear_potential_roadblocks([road_ring]):
                     return True
 
-        return self.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_6_1.py b/campaign/campaign_main/campaign_6_1.py
index 362dca4da..8d9bdaf36 100644
--- a/campaign/campaign_main/campaign_6_1.py
+++ b/campaign/campaign_main/campaign_6_1.py
@@ -42,7 +42,7 @@ road_mystery = RoadGrids([[C4, D5], D4, G2, [G1, H2]])
 
 
 class Config:
-    SUBMARINE = 0
+    FLEET_BOSS = 1
     MAP_MYSTERY_HAS_CARRIER = True
 
 
@@ -70,7 +70,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0], fleet=2):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.clear_roadblocks([road_boss])
 
-        return self.fleet_2.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_6_2.py b/campaign/campaign_main/campaign_6_2.py
index ca7093447..dc03fd34f 100644
--- a/campaign/campaign_main/campaign_6_2.py
+++ b/campaign/campaign_main/campaign_6_2.py
@@ -64,7 +64,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0], fleet=2):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.clear_roadblocks([road_boss])
 
-        return self.fleet_2.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_6_3.py b/campaign/campaign_main/campaign_6_3.py
index fab3c4e97..219643b60 100644
--- a/campaign/campaign_main/campaign_6_3.py
+++ b/campaign/campaign_main/campaign_6_3.py
@@ -77,7 +77,7 @@ class Campaign(CampaignBase):
 
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0], fleet=2):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.clear_roadblocks([road_boss])
 
-        return self.fleet_2.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/campaign/campaign_main/campaign_6_4.py b/campaign/campaign_main/campaign_6_4.py
index 8d56d61b6..fc99d9c1c 100644
--- a/campaign/campaign_main/campaign_6_4.py
+++ b/campaign/campaign_main/campaign_6_4.py
@@ -68,9 +68,12 @@ class Campaign(CampaignBase):
     def battle_5(self):
         self.clear_all_mystery()
 
+        if not self.config.FLEET_2:
+            self.pick_up_ammo()
+
         boss = self.map.select(is_boss=True)
         if boss:
-            if not self.check_accessibility(boss[0], fleet=2):
+            if not self.check_accessibility(boss[0], fleet='boss'):
                 return self.clear_roadblocks([road_boss])
 
-        return self.fleet_2.clear_boss()
+        return self.fleet_boss.clear_boss()
diff --git a/module/config/argparser.py b/module/config/argparser.py
index f3baab998..209a620a5 100644
--- a/module/config/argparser.py
+++ b/module/config/argparser.py
@@ -141,12 +141,12 @@ def main(ini_name=''):
     f1.add_argument('--舰队步长1', default=default('--舰队步长1'), choices=['1', '2', '3', '4', '5', '6'])
 
     f2 = fleet.add_argument_group('BOSS队')
-    f2.add_argument('--舰队编号2', default=default('--舰队编号2'), choices=['1', '2', '3', '4', '5', '6'])
+    f2.add_argument('--舰队编号2', default=default('--舰队编号2'), choices=['不使用', '1', '2', '3', '4', '5', '6'])
     f2.add_argument('--舰队阵型2', default=default('--舰队阵型2'), choices=['单纵阵', '复纵阵', '轮形阵'])
     f2.add_argument('--舰队步长2', default=default('--舰队步长2'), choices=['1', '2', '3', '4', '5', '6'])
 
     f3 = fleet.add_argument_group('备用道中队')
-    f3.add_argument('--舰队编号3', default=default('--舰队编号3'), choices=['1', '2', '3', '4', '5', '6'])
+    f3.add_argument('--舰队编号3', default=default('--舰队编号3'), choices=['不使用', '1', '2', '3', '4', '5', '6'])
     f3.add_argument('--舰队阵型3', default=default('--舰队阵型3'), choices=['单纵阵', '复纵阵', '轮形阵'])
     f3.add_argument('--舰队步长3', default=default('--舰队步长3'), choices=['1', '2', '3', '4', '5', '6'])
 
diff --git a/module/config/argparser_en.py b/module/config/argparser_en.py
index ad53be009..86614c4ec 100644
--- a/module/config/argparser_en.py
+++ b/module/config/argparser_en.py
@@ -139,12 +139,12 @@ def main(ini_name=''):
     f1.add_argument('--fleet_step_1', default=default('--fleet_step_1'), choices=['1', '2', '3', '4', '5', '6'], help='In event map, fleet has limit on moving, so fleet_step is how far can a fleet goes in one operation, if map cleared, it will be ignored')
 
     f2 = fleet.add_argument_group('Boss Fleet')
-    f2.add_argument('--fleet_index_2', default=default('--fleet_index_2'), choices=['1', '2', '3', '4', '5', '6'])
+    f2.add_argument('--fleet_index_2', default=default('--fleet_index_2'), choices=['do_not_use', '1', '2', '3', '4', '5', '6'])
     f2.add_argument('--fleet_formation_2', default=default('--fleet_formation_2'), choices=['Line Ahead', 'Double Line', 'Diamond'])
     f2.add_argument('--fleet_step_2', default=default('--fleet_step_2'), choices=['1', '2', '3', '4', '5', '6'], help='In event map, fleet has limit on moving, so fleet_step is how far can a fleet goes in one operation, if map cleared, it will be ignored')
 
     f3 = fleet.add_argument_group('Alternate Mob Fleet')
-    f3.add_argument('--fleet_index_3', default=default('--fleet_index_3'), choices=['1', '2', '3', '4', '5', '6'])
+    f3.add_argument('--fleet_index_3', default=default('--fleet_index_3'), choices=['do_not_use', '1', '2', '3', '4', '5', '6'])
     f3.add_argument('--fleet_formation_3', default=default('--fleet_formation_3'), choices=['Line Ahead', 'Double Line', 'Diamond'])
     f3.add_argument('--fleet_step_3', default=default('--fleet_step_3'), choices=['1', '2', '3', '4', '5', '6'], help='In event map, fleet has limit on moving, so fleet_step is how far can a fleet goes in one operation, if map cleared, it will be ignored')
 
diff --git a/module/config/config.py b/module/config/config.py
index e4efe1db3..6760073f8 100644
--- a/module/config/config.py
+++ b/module/config/config.py
@@ -419,7 +419,7 @@ class AzurLaneConfig:
         self.ENABLE_FLEET_CONTROL = to_bool(option['enable_fleet_control'])
         self.ENABLE_MAP_FLEET_LOCK = to_bool(option['enable_map_fleet_lock'])
         for n in ['1', '2', '3']:
-            self.__setattr__(f'FLEET_{n}', int(option[f'fleet_index_{n}']))
+            self.__setattr__(f'FLEET_{n}', int(option[f'fleet_index_{n}']) if to_bool(option[f'fleet_index_{n}']) else 0)
             self.__setattr__(f'FLEET_{n}_FORMATION', int(option[f'fleet_formation_{n}'].split('_')[1]))
             self.__setattr__(f'FLEET_{n}_STEP', int(option[f'fleet_step_{n}']))
         self.COMBAT_AUTO_MODE = option['combat_auto_mode']
diff --git a/module/map/fleet.py b/module/map/fleet.py
index c247afaa3..421cca48b 100644
--- a/module/map/fleet.py
+++ b/module/map/fleet.py
@@ -50,11 +50,18 @@ class Fleet(Camera, MapOperation, AmbushHandler):
 
     @property
     def fleet_boss(self):
-        if self.config.FLEET_BOSS == 2 and self.config.FLEET_2:
+        if self.config.FLEET_BOSS == 2 or self.config.FLEET_2:
             return self.fleet_2
         else:
             return self.fleet_1
 
+    @property
+    def fleet_boss_index(self):
+        if self.config.FLEET_BOSS == 2 or self.config.FLEET_2:
+            return 1
+        else:
+            return 1
+
     @property
     def fleet_step(self):
         if not self.config.MAP_HAS_FLEET_STEP:
@@ -410,13 +417,18 @@ class Fleet(Camera, MapOperation, AmbushHandler):
         """
         Args:
             grid (Grid):
-            fleet (int): 1, 2
+            fleet (int, str): 1, 2, 'boss'
 
         Returns:
             bool: If accessible.
         """
         if fleet is None:
             return grid.is_accessible
+        if isinstance(fleet, str) and fleet.isdigit():
+            fleet = int(fleet)
+        if fleet == 'boss':
+            fleet = self.fleet_boss_index
+
         if fleet == self.fleet_current_index:
             return grid.is_accessible
         else: