What?
I'm not sure; right now there isn't an easy way to keep track unless you're actively watching, AFAIK.
The way the game plays out, currently, prevents single town factions from conquering much. They have (at most) a manpower generation rate of something ~80 (with lots of notables) per week, divided among however many parties, before raiders hit the villages. That isn't really enough to put together an army big enough to take down a mid-game or later settlement, unless they get stupidly lucky -- and don't get smashed flat in the attempt by a larger faction.