One of my armies was out of movement points and couldn't reach the battle. The other 2 armies were within the enemies zone of control but couldn't attack. No problem, I got another general from a nearby town and attacked with him. The other 2 armies appeared as reinforcements. I greatly outnumbered the enemy and it was going to be an easy win.
BUT... I could only control 2 of my armies, one of them was a general and his body guard the other was a half stack army. I couldn't control my strongest army. It was controlled by the stupid AI.
I won the battle, but the AI lost my 10 star general and my most expensive army!! What happened? I made sure that the AI wasn't contolling any of the armies before the battle started and I could control my other 2 armies but the 3rd army of reinforcements were controlled by the computer. Strange.