Ok... SO i was just playing a game where it was 2v1 and I was the single player. Played out almost the whole battle to the point where there were around 6 total units left on the map (including mine and my opponents units). Then out of no where smack in the middle of the map an entirely new army appears under my opponents control and the three units i had left were wiped out instantly... now I'm new and probably would have lost anyway but was wondering where this whole other army came from???? Do units heal over time if they leave the map and come back?