forgot to add that i eliminated the taxcalans who annoyed the crap out of me with their fifty million stacks and infinite money, by sending in about 10 assassins and over about 20 turns killed all their leaders and generals. if you do this with a smaller faction before they get so big its alot easier, but somehow feels like cheating. it is a good option to get rid of an annoying opponent if you're tied up with another war elsewhere.