Lol whatever faction the player is in wins. But yeah, I think because the autobattles. Are not as determines by like spear > calvary or something like that. But by a specific...powerpoint given to each unit. So like knights would have more points as to a sergeant. Like more money = more points. so they tally the totals of all the units points to compare vs the others and whoever has more, has that much less losses and that much more chance of winning and stuff.
Like in siege defense for rhodoks, 100 can kill 300. like with me just in it by myself, not even killing anything, just standing in castle, we rhodoks owned like swadians. but once its not with a player involved it goes the opposite way.