Genghis Khan was the greatest Mongol who laid the foundation of Nomadic empire. His contribution was immense in unifying Mongols. It was due to his efforts that a vast Mongol empire was established. He was born in the year 1162. He was born near the river Onon. His father’s name was Yesugei, who was the chief of the tribe, Kiyat. His mother Oleun-eke belonged to Onggerat tribe. His original name was Temujin. He grew up as a brave man. He organized a powerful army which helped him to lay down the foundation of a vast empire. His main achievements were the conquest of Northern China, conquest of Qara Katie, etc. During the period from 1219 to 1222 CE the Mongol forces occupied Bukhara, Samarqand, Balk, Marv, Nishapur and Herat. Genghis not only built vast empire but also contributed a lot in improving the civil administration of the empire.