The worst part is when you get the Constant retreat message while chasing the AI, which is the one retreating. I remember a battle where I marched across the map, the AI ran to one side. I took my time following them, then they started running down the side of the map. I followed them all together, taking my time. They ran to where I started the battle. So I followed. They started up the other side once I got there, and then a full few units of mine just ran off the field. Eventhough I was constantly chasing the AI, and keeping my army together. I couldn't do anything but laugh.