Temujin emerged as the charismatic leader known as Genghis Khan and assembled a large army to conquer lands for the Mongol Empire. His forces were highly skilled warriors who utilized advanced strategies like feigned retreats, coordinated ambushes, and rapid communication to defeat larger cities and towns. They were especially effective with their cavalry and horse archery tactics. The Mongol soldiers were also very loyal, diligent in training, and able to live off the land, making them a formidable force in Genghis Khan's conquests across Russia, the Middle East and China.