[1.5 Beta, BUG] AI armies can move into a square with a "wandering mob" without attacking or battling it.
In a recent game, an Altar champion was able to move into a square with an existing wandering elemental army without battling it. So, in essence, the Altar army was stacked on the same tile as the random wandering mob's army. There was the (2) to show the two armies were stacked.
