I finally got them to fight.

Battle Results [roughly]:
1400 enemies killed
200 out if 400 allies killed
700 enemies still survivng

The chariots went down easy, and I managed to elude the main army for most of the battle. Unfortuantely, a group of mercenary slingers killed a lot of my guys, and it took forever to break through the main line and slaughter them. I was able to hit the general's unit hard with my whole army, killing him. The other lesser troops routed easily, but the phalangites and the other heavy troops wouldn't break.

Just thought you might want to know.