Index: binaries/data/mods/public/simulation/data/technologies/tower_armour.json
===================================================================
--- binaries/data/mods/public/simulation/data/technologies/tower_armour.json
+++ binaries/data/mods/public/simulation/data/technologies/tower_armour.json
@@ -1,17 +0,0 @@
-{
-	"genericName": "Sturdy Foundations",
-	"description": "Reinforce the foundations in preparation of an attack.",
-	"cost": { "food": 0, "wood": 500, "stone": 500, "metal": 500 },
-	"requirements": { "tech": "phase_city" },
-	"requirementsTooltip": "Unlocked in City Phase.",
-	"icon": "architecture.png",
-	"researchTime": 40,
-	"tooltip": "Towers +2 armor.",
-	"modifications": [
-		{ "value": "Armour/Hack", "add": 2 },
-		{ "value": "Armour/Pierce", "add": 2 },
-		{ "value": "Armour/Crush", "add": 2 }
-	],
-	"affects": ["Tower"],
-	"soundComplete": "interface/alarm/alarm_upgradearmory.xml"
-}
Index: binaries/data/mods/public/simulation/data/technologies/tower_health.json
===================================================================
--- binaries/data/mods/public/simulation/data/technologies/tower_health.json
+++ binaries/data/mods/public/simulation/data/technologies/tower_health.json
@@ -6,11 +6,9 @@
 	"requirementsTooltip": "Unlocked in City Phase.",
 	"icon": "architecture.png",
 	"researchTime": 40,
-	"tooltip": "Towers +2 armor.",
+	"tooltip": "Towers +25% health.",
 	"modifications": [
-		{ "value": "Armour/Hack", "add": 2 },
-		{ "value": "Armour/Pierce", "add": 2 },
-		{ "value": "Armour/Crush", "add": 2 }
+		{ "value": "Health/Max", "multiply": 1.25 }
 	],
 	"affects": ["Tower"],
 	"soundComplete": "interface/alarm/alarm_upgradearmory.xml"
Index: binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_artillery.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_artillery.xml
+++ binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_artillery.xml
@@ -69,11 +69,7 @@
   </Obstruction>
   <ProductionQueue>
     <Technologies datatype="tokens">
-      tower_watch
-      tower_crenellations
-      tower_range
-      tower_murderholes
-      tower_armour
+      tower_health
     </Technologies>
   </ProductionQueue>
   <Sound>
Index: binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_bolt.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_bolt.xml
+++ binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_bolt.xml
@@ -68,11 +68,7 @@
   </Obstruction>
   <ProductionQueue>
     <Technologies datatype="tokens">
-      tower_watch
-      tower_crenellations
-      tower_range
-      tower_murderholes
-      tower_armour
+      tower_health
     </Technologies>
   </ProductionQueue>
   <Sound>
Index: binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_sentry.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_sentry.xml
+++ binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_sentry.xml
@@ -48,6 +48,10 @@
   <ProductionQueue>
     <Technologies datatype="tokens">
       tower_watch
+      tower_crenellations
+      tower_range
+      tower_murderholes
+      tower_health
     </Technologies>
   </ProductionQueue>
   <TerritoryInfluence>
Index: binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_stone.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_stone.xml
+++ binaries/data/mods/public/simulation/templates/template_structure_defensive_tower_stone.xml
@@ -48,7 +48,7 @@
       tower_crenellations
       tower_range
       tower_murderholes
-      tower_armour
+      tower_health
     </Technologies>
   </ProductionQueue>
   <TerritoryInfluence>