Quote Originally Posted by Brennus View Post
2 Possibilities-

1.Find an enemy city which has a plague. Send a spy in and wait until the poor fellow is infected, then have him lodge in your cities. This will bring your population down quickly but at the same time likely decrease your cities moral.

2. Train large armies of levies. Send them off into the wilderness and dispand them, the problem is this may take time, time which you dont have.

What are the causes of your settlments unrest? In my current Casse campaign my Belgic cities became increasingly rebellious due to a high profile Aedui spy that was moving between the territories, just double check your unrest isn't purely the result of overpopulation.
you fellows have no imagination: just use the population cheat, and say that a plague caused it.