I am in a civil war as Brutii. My finances is NOT good at the moment with 6 full armys(20 units). So i finance my war with the other factions by exterminating every city i conquer. First of all it makes the managment of those cities easier, no population, no problem. Secondly i make lots of cash thanx to that, ussually i get between 8000 and 16000 dependent on the size of the city.

So it goes like this,
1.i conquere the city,
2.exterminate the pop.,
3.get around 12000 denarii,
4.retrain the units
5.send a diplomat and bribe their army(ussaully 5+ army which i use as a garrision on the conquered city)
6. I move my 20unit army to the next city....back to 1.



PS. i dont make any difference between roman cities in Italy and the others. I exterminate them all. The best one was when i extermineted Rome, got something like 20000 in begining of the civil war, i used it to bribe 2-3 pretty big rival armies.....