diff --git a/CREDITS.md b/CREDITS.md
index 0ba36abe22..445e2d0dae 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -573,6 +573,7 @@ This page lists all the individual contributions to the project by their author.
   - Skip target scanning function calling for unarmed technos (code)
   - Force techno targeting in distributed frames to improve performance
   - Use `SkipCrushSlowdown=true` to avoid the bug related to `Accelerates=true` and `MovementZone=CrushAll`
+  - Customize the chained damage of the wall
 - **solar-III (凤九歌)**
   - Target scanning delay customization (documentation)
   - Skip target scanning function calling for unarmed technos (documentation)
diff --git a/Phobos.vcxproj b/Phobos.vcxproj
index 0f18342d27..0776ddb5c5 100644
--- a/Phobos.vcxproj
+++ b/Phobos.vcxproj
@@ -18,6 +18,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="src\Ext\Cell\Hooks.cpp" />
     <ClCompile Include="src\Ext\Infantry\Hooks.cpp" />
     <ClCompile Include="src\Ext\Infantry\Hooks.Firing.cpp" />
     <ClCompile Include="src\Ext\TechnoType\Hooks.MultiWeapon.cpp" />
diff --git a/YRpp b/YRpp
index a8c3f616b8..1d715b4954 160000
--- a/YRpp
+++ b/YRpp
@@ -1 +1 @@
-Subproject commit a8c3f616b8b421bd8b806cf90e560ec59355fd05
+Subproject commit 1d715b4954756b5d0ee20ffd34488ee5bc5bf2b7
diff --git a/docs/Fixed-or-Improved-Logics.md b/docs/Fixed-or-Improved-Logics.md
index dda05e64e1..1e59faf0e3 100644
--- a/docs/Fixed-or-Improved-Logics.md
+++ b/docs/Fixed-or-Improved-Logics.md
@@ -694,6 +694,19 @@ ProneSpeed.NoCrawls=1.5       ; floating point value, multiplier
 ProneSpeed=                   ; floating point value, multiplier, by default, use the corresponding global value according to Crawls
 ```
 
+## Overlays
+
+### Customize the chained damage of the wall
+
+- In vanilla, when the wall is damaged, it will deal 200 damage to the walls in the 4 nearby cells. This makes connected walls more vulnerable to damage compared to single walls. 
+- Now you can customize that damage by using the following flag.
+
+In `rulesmd.ini`:
+```ini
+[CombatDamage]
+AdjacentWallDamage=200  ; integer
+```
+
 ## Particle systems
 
 ### Fire particle target coordinate adjustment when firer rotates
diff --git a/docs/Whats-New.md b/docs/Whats-New.md
index ebc79976ad..9e4e48e417 100644
--- a/docs/Whats-New.md
+++ b/docs/Whats-New.md
@@ -426,6 +426,7 @@ New:
 - [Damaged aircraft image changes](New-or-Enhanced-Logics.md#damaged-aircraft-image-changes) (by Fryone)
 - [Additional attached animation position customizations](Fixed-or-Improved-Logics.md#attached-animation-position-customization) (by Starkku)
 - Use `SkipCrushSlowdown=true` to avoid the bug related to `Accelerates=true` and `MovementZone=CrushAll` (by TaranDahl)
+- Customize the chained damage of the wall (by TaranDahl)
 
 Vanilla fixes:
 - Fixed sidebar not updating queued unit numbers when adding or removing units when the production is on hold (by CrimRecya)
diff --git a/src/Ext/Cell/Body.h b/src/Ext/Cell/Body.h
index 41689b9e9e..fc1dfae4d8 100644
--- a/src/Ext/Cell/Body.h
+++ b/src/Ext/Cell/Body.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <CellClass.h>
 
+#include <Helpers/Macro.h>
 #include <Utilities/Container.h>
 #include <Utilities/Constructs.h>
 #include <Utilities/Template.h>
diff --git a/src/Ext/Cell/Hooks.cpp b/src/Ext/Cell/Hooks.cpp
new file mode 100644
index 0000000000..3472a5f499
--- /dev/null
+++ b/src/Ext/Cell/Hooks.cpp
@@ -0,0 +1,11 @@
+#include "Body.h"
+
+#include <Ext/Rules/Body.h>
+
+DEFINE_HOOK(0x480EA8, CellClass_DamageWall_AdjacentWallDamage, 0x7)
+{
+	enum{ SkipGameCode = 0x480EB4 };
+	GET(CellClass*, pThis, EAX);
+	pThis->DamageWall(RulesExt::Global()->AdjacentWallDamage);
+	return SkipGameCode;
+}
diff --git a/src/Ext/Rules/Body.cpp b/src/Ext/Rules/Body.cpp
index 869b2e39ae..61dd154ab0 100644
--- a/src/Ext/Rules/Body.cpp
+++ b/src/Ext/Rules/Body.cpp
@@ -295,6 +295,8 @@ void RulesExt::ExtData::LoadBeforeTypeData(RulesClass* pThis, CCINIClass* pINI)
 	this->PlayerAttackMoveTargetingDelay.Read(exINI, GameStrings::General, "PlayerAttackMoveTargetingDelay");
 	this->DistributeTargetingFrame.Read(exINI, GameStrings::General, "DistributeTargetingFrame");
 	this->DistributeTargetingFrame_AIOnly.Read(exINI, GameStrings::General, "DistributeTargetingFrame.AIOnly");
+	
+	this->AdjacentWallDamage.Read(exINI, GameStrings::CombatDamage, "AdjacentWallDamage");
 
 	// Section AITargetTypes
 	int itemsCount = pINI->GetKeyCount("AITargetTypes");
@@ -546,6 +548,7 @@ void RulesExt::ExtData::Serialize(T& Stm)
 		.Process(this->TintColorBerserk)
 		.Process(this->AttackMove_IgnoreWeaponCheck)
 		.Process(this->AttackMove_StopWhenTargetAcquired)
+		.Process(this->AdjacentWallDamage)
 		;
 }
 
diff --git a/src/Ext/Rules/Body.h b/src/Ext/Rules/Body.h
index 02d079ba0b..3439adf78f 100644
--- a/src/Ext/Rules/Body.h
+++ b/src/Ext/Rules/Body.h
@@ -244,6 +244,8 @@ class RulesExt
 		Valueable<bool> AttackMove_IgnoreWeaponCheck;
 		Nullable<bool> AttackMove_StopWhenTargetAcquired;
 
+		Valueable<int> AdjacentWallDamage;
+
 		// cache tint color
 		int TintColorIronCurtain;
 		int TintColorForceShield;
@@ -441,6 +443,8 @@ class RulesExt
 
 			, AttackMove_IgnoreWeaponCheck { false }
 			, AttackMove_StopWhenTargetAcquired { }
+
+			, AdjacentWallDamage { 200 }
 		{ }
 
 		virtual ~ExtData() = default;