Hey guys -it sems that AI is having bit of a problem with going though winter - especialy in the north. Armies are staying on the enemy terien whole winter without enough supplies - and that makes it quit easy to beat them.
I know it's not right (and for single player only) but I back up and then modify data in the GameLogic.opt file (/WSS/Settings) to greatly reduce attrition until something is officially done, if even possible.