 The Mongol commanders also realized the quality of their army and were not impressed by the mere size of the opposing forces of their enemies.In this way they could stand and hold, and their various tactics would often cause an enemy to break and retreat in a panic that inevitably lead to a rout from Mongol mounted archers and lancers.They often employed siege engines and engineers from China and Persia in their ranks to enable them to take fortified cities - however, this would not have been practical on the fast-campaign of Jebe/Subutai.