Mongol cavalry grazed cattle in peacetime and soldiers in wartime, and the speed of role change was not comparable to that of traditional farming peoples. Herders galloped on horses on the grasslands, and from an early age they developed a good martial art that could ride and shoot, and their relationship with horses was very deep, in peacetime, horses were their friends, in wartime, horses became their weapons, and could also become food, tools, utensils, and so on.

The reason why the Mongol army was invincible was inseparable from the habits they had developed in peacetime, the Mongols loved to hunt, and Genghis Khan called hunting a compulsory course to turn herders into warriors. The Mongol cavalry fought in the same way as they hunted, they regarded the enemy as beasts, and the various cavalry divisions of labor and cooperation, first rounding up the horses, dispersing the prey, finding the prey that ran out of the encirclement, they would shoot it with an arrow, and then send the main army to rush into the formation and slash and kill.
In the hunt, the horse's maneuverability and flexibility were fully exerted by them, which european knights did not have at all. European cavalry would wear heavy armor when fighting, defeat the enemy's formation by charging, and then fight with the infantry. When they encountered the nimble Mongol cavalry, they were completely unable to adapt to this novel way of fighting, and the Europeans suffered for it.
In addition, the Europeans also needed a large number of peasants to transport supplies, and the Mongol army did not have to consider the logistics problem at all, the Mongol army went out, each soldier would bring several horses, these horses were a mobile logistics supply station, when they were hungry, if they could not find food, they would put some horse blood to drink. When the horses were too weak to continue bleeding, they cut off the ears of the horses, cooked them, and fed them.
A few days later, when the horse died of weakness, the Mongol soldiers would divide and marinate the horse and make it into jerky as food for the army to fight. The horse's stomach can also be inflated to help them cross the river, and it can also be made into a vessel for storing water, which is very magical and fully demonstrates the wisdom of the Mongol army. The Europeans were stunned to see it, and the Europeans were convinced of losing to such an army.