Please note that we've updated the Mount & Blade II: Bannerlord save file system which requires you to take certain steps in order for your save files to be compatible with e1.7.1 and any later updates. You can find the instructions here.
Why would that be a thing. Have a single faction have to fight off 3 factions and on top of that the vlandians and aserai who will see battania weak and make war on them, i was in a 5v1 war before and forced to use cheats to stop all of it. I know well that any 3 faction war on a single faction is almost a immediate loss. Why did they think this was a good idea?