diff --git a/changelog.txt b/changelog.txt
index d8eb0bd..be5fdaa 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -11,6 +11,7 @@ Date: 23. 11. 2021
     - Optimized regional base upgrades so that the work is spread over many ticks reducing lag spikes
     - Optimized adding new chunks to the Rampant in-memory state map
   Tweaks:
+    - New enemy regional bases that have two factions now do 75% on one faction and 25% on the faction for building and upgrading enemy structures
     - Doubled the processing rate of regional faction bases with new enemies
     - Added a small chance (0.5%) that Hives can spawn outside resource patches (Thank you Dimm2101)
     - Increased suicide and nuclear biters attack range from 0.5 to 1
diff --git a/libs/BaseUtils.lua b/libs/BaseUtils.lua
index 495042c..fbb4251 100644
--- a/libs/BaseUtils.lua
+++ b/libs/BaseUtils.lua
@@ -269,7 +269,17 @@ function baseUtils.upgradeEntity(entity, baseAlignment, map, disPos, evolve, reg
     local distance = mMin(1, euclideanDistancePoints(position.x, position.y, 0, 0) * BASE_DISTANCE_TO_EVO_INDEX)
     local evoIndex = mMax(distance, map.evolutionLevel)
 
-    local spawnerName = findEntityUpgrade(baseAlignment[mRandom(#baseAlignment)],
+    local pickedBaseAlignment
+    if (#baseAlignment == 2) then
+        if mRandom() < 0.75 then
+            pickedBaseAlignment = baseAlignment[2]
+        else
+            pickedBaseAlignment = baseAlignment[1]
+        end
+    else
+        pickedBaseAlignment = baseAlignment[1]
+    end
+    local spawnerName = findEntityUpgrade(pickedBaseAlignment,
                                           currentEvo,
                                           evoIndex,
                                           entity,