diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege.xml
index d21b18697d..84c786b8ab 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_unit_mechanical">
+  <Armour>
+    <Pierce>25.0</Pierce>
+  </Armour>
   <Cost>
     <Population>3</Population>
   </Cost>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ballista.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ballista.xml
index 93f2644804..4e2db51ba1 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ballista.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ballista.xml
@@ -2,7 +2,6 @@
 <Entity parent="template_unit_mechanical_siege">
   <Armour>
     <Hack>4.0</Hack>
-    <Pierce>10.0</Pierce>
     <Crush>2.0</Crush>
   </Armour>
   <Attack>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_onager.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_onager.xml
index 30073b7f58..0fcf23415a 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_onager.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_onager.xml
@@ -2,7 +2,6 @@
 <Entity parent="template_unit_mechanical_siege">
   <Armour>
     <Hack>4.0</Hack>
-    <Pierce>15.0</Pierce>
     <Crush>10.0</Crush>
   </Armour>
   <Attack>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ram.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ram.xml
index 7942c6a505..53951e735d 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ram.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_ram.xml
@@ -2,7 +2,6 @@
 <Entity parent="template_unit_mechanical_siege">
   <Armour>
     <Hack>5.0</Hack>
-    <Pierce>20.0</Pierce>
     <Crush>6.0</Crush>
   </Armour>
   <Attack>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_tower.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_tower.xml
index dc75d830e3..4f6df05871 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_tower.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_siege_tower.xml
@@ -2,7 +2,6 @@
 <Entity parent="template_unit_mechanical_siege">
   <Armour>
     <Hack>7.0</Hack>
-    <Pierce>20.0</Pierce>
     <Crush>6.0</Crush>
   </Armour>
   <Attack>