Okay, in that case I also have no idea what controls this behavior.Barbarians. My autocorrect is playing tricks on me.
The Great Wall isn't the reason. And nothing relating to it has been changed lately.Just a guess. Dont know if it is connected to me having the Great wall.
As long as there were only two barbs they hesitated to attack and usually retreated without fight. As soon as they grouped in fours they attacked (and in vincinity of my empire).
They don't act like this with UNITAI_ATTACK?I don't think so. Barbarians act like this in North America too. At their spawn, I change via WB their AI from "Attack_City" to "Attack" just to avoid their current strange behaviour.