How can the western army effectively fight against Mongolian talents in the Middle Ages?

1. To build the Great Wall-style strategic defense system, it is not only a wall, but also a beacon tower, a battle support fortress and a strategic depth in the rear. Once the enemy is found, the beacon tower will immediately give an early warning, and the troops stationed in the strategic depth stronghold in the rear will immediately rush to the battle support fortress along the Great Wall and the first line of the Great Wall for defense;

2. For places outside the Great Wall (plain areas where water and grass are not abundant), the whole people should be mobilized, and the wall should be forced to clear the field, leaving no grain or grass for the devils. It is best to set fire to it, destroy the wells or poison them;

3. don't fight the enemy in a flat place, strictly limit the field battle with the enemy, never cross the Great Wall easily, and the army is equipped with projectile weapons.