When facing the enemy, two of the five squadrons would become the front, or spearhead, ranks, with the three remaining the rear ranks. When the battle began, the rear ranks would march through the lines of the front, showering arrows on the enemy. Then, the rear ranks retreated, turning towards the sides to prevent escape while the front ranks charged with the decisive blow.
While Europeans prized strength and heavy armor, Mongols emphasized speed and mobility. Once they shot the horses from under the opponent, there was little left fro them to do in their heavy metal armor.
Mongols shied away from hand to hand combat at the beginning of a battle, not from lack of strength, but because they liked to harass the opponent with feints, showers of arrows, and javelins until the enemy was sufficiently exhausted.
After China and Persia, the Mongols moved into Russia. After securing Russian tribute, they set their eyes on Europe. However, right as they were regrouping after the first attacks on Poland, a messenger arrived with news of the death of the Khan. The khan had made a law that all his descendants must return to their homeland, no matter where they were, to elect a new Khan. Therefore, the Mongols called off their invasion and didn’t come back.