Two days ago I fought a BIG battle against the Romans just outside of Roma itself, they deployed 6500 men! I killed them almost all and wondered "why the heck doesn't appear the "battle won" pop-up?" when I discovered that the Roman general, the Princeps, and his proud guard of 124 equites consularis was sitting around in the wood. I could make him flee, but couldn't kill him because my horsies were all too exhausted. Needless to say Roma was captured and sacked the next turn.