The AI for this game, despite it's flaws, definitely is coming along. I definitely look forward to seeing what the finished product will look like.
But more to the point, I just witnessed an interesting behavior: a Guardian Statue army, probably rampaging out of a nearby Scrapyard, went into my territory and proceeded to walk past a couple of my outposts and resources, and attacked a pack of Ophidians guarding a treasure crystal crag which I was a bit worried about, as I did not yet have an army capable of dealing with them. I also had no army capable of dealing with the Guardian Statue army, but that army was kind enough to lose about half it's strength to the poor ambushed Ophidians.
Is this intended monster behavior, that monsters will sometimes attack each other? I'm not necessarily complaining; this guardian statue army also probably wiped out a city or two belonging to an AI neighbor. But, it's also possible that this was an accidental encounter and the army is really on it's way to my city, in which case it should have stepped around the Ophidian lair.