Americas Campaign Battle Crash

[The Black Douglas]

i am currently apachean tribes, but i stopped playing because it would freeze up just before victory on the battlefield.
although days before, it was fine, so it must be due to campaign progress i made since then...
i can't replay the battle because i know it will freeze just before i get victory, i would end up trashing my pc.
it was my first campaign anyway, i was just testing the water.

it's only ever happened to me on MTW2 expansions, americas & teutonic both.