For the war chariots of the British, city battles are devastating. They usually run in a very widespread formation, totally lose their way and get completely split up and thus out of control.

Another problem I had is in the use of siege towers, I ve got the very strong impression that these engines were only created to lead one unit after another up onto the walls. When I place serveral units within, I usually end up having them split up and coming out of the tower rather slowly and in complete disorder.