diff --git a/core/src/com/unciv/logic/files/UncivFiles.kt b/core/src/com/unciv/logic/files/UncivFiles.kt
index 91a9355220..aca02d451f 100644
--- a/core/src/com/unciv/logic/files/UncivFiles.kt
+++ b/core/src/com/unciv/logic/files/UncivFiles.kt
@@ -428,7 +428,15 @@ class UncivFiles(
             game.version = GameInfo.CURRENT_COMPATIBILITY_VERSION
 
             if (updateChecksum) game.checksum = game.calculateChecksum()
-            val plainJson = json().toJson(game)
+            var plainJson = json().toJson(game)
+
+            val removeableStrings = listOf(
+                ",\"history\":{}", // empty history object in tile
+                ",\"promotions\":{}", // empty promotions object in unit
+            )
+            for (removableString in removeableStrings)
+                plainJson = plainJson.replace(removableString,"")
+
             return if (forceZip ?: saveZipped) Gzip.zip(plainJson) else plainJson
         }