Lets see how the battle looks like after a few hours..

I painted a green circle in paint to show what I am tooltipping here..

Here we can see that some of the Teuton army has engaged, but there have also been reinforcements arriving for the allied army on their right flank. We can see that our Crusader Knights, which are regular troops, are performing well, but there is no way they will be able to fight off 2,000 levies without reinforcements.