The Protectors of Etheria is a stand-alone mod of the game Warlords Battlecry 3 (i.e. it can be run without having the original game installed - 100% free full game). It is an improved RTS/RPG game with new campaigns, quests, terrain, units, items, heroes, modding features and more. Beta versions available for download!
Coming in 0.8.7
The AI really doesn't want their keep being knocked down by pesky infantry, do they? :p
The AI will now build walls around some of their structures, including towers. In some cases they will build them as barricades within their base.
That is really intelligent, I hope the AI doesn't block itself inside its base in choke pointy maps though.