Passive AI?

[Omanes Alexandrapolites]

Not quite like that, although sometimes the AI, if they choose to sally, sit inside the city waiting for the timer to run down.

This is extremely frustrating - since siege weapons don't appear for sallies, it's very difficult to launch an attack yourself. You either have to quit the battle or wait for a draw to be decided by the timer.

If there is no time then your a little stuck - you either quit and end up defeated, or you stay sitting there hoping they will eventually move and do something.