BlackX
Chieftain
If you wish to lower the number of enemy units in a city try this. Leave your stack of troops 2 tiles away from the city and put a scout warrior or better, some cheap obsolete unit between your stack and the city. The AI will destory it but the unit will be left out in the dark for you to eliminate. Chances are they'll be damaged in addition to loosing the city bonus. It's best to use a 2mp unit so you can attack and move back to your stack. When you use a unit that is really weak compared to the AI's it can't help itself but attack it seems.