I've just observed a rather large Darkling army and an Obsidian Golem who decided for some reason to take what appears to be a very circuitous path.

The general terrain situation is that I ended up with a starting position not too far from Imperium ruins, presumably where these monsters came from. My cities are to it's west, and the terrain funnels possible paths to the south from the western Imperium entrance to go right by one of my cities. Both monsters walked right by my city, and headed south . . . the Obsidian guardian turned around fairly promptly and returned to it's post outside the Imperium gate, but the Darkling army actually covered about half of a large map going south, attacked and killed a NPC spearman, then turned around.

:/

Is that supposed to be some kind of raiding party? It went awfully far out of it's way, whatever it's algorithmic intentions were.