Quote Originally Posted by Agent Smith

The result was devastating. Half of the enemy horse archers were kept busy and out of the battle, while the main force was crushed and the other horse archers were kept at bay by my peasant archers. I had around 100 casualties, and the enemy army completely routed. I think that isn't bad, even for fighting uphill against the enemy.

Thoughts?
Not bad, although it should only work as long as the AI stays passive. If they had charged your main line with their heavy cav while being supported by footarchers, then you'd been doing the running.
The Mongols can do really quick cav attacks, which surprised me the first time it happened since i was getting used to the generally slow and more passive AI.