Genghis Khan was born in or around 1162 AD and was originally named Temujin. Genghis was born into the Borgekin tribe, descended from Kobel Khan.
At 9, shortly after Gengis was sent to go live with the family of his future bride, his father attended a feast with a rival tribe, and got poisoned.
Shorty after Gengis learned of his fathers death, he went back to his tribe to take leadership, but was rejected as they did not want a child leader.
At the age of 20, Gengis had unified all the mongols under 1 ruler, him, to take over china. During this period, he got revenge on 3 tribes. all 3 he had leveled to the ground, sparing no life, but on 1 of the 3, he boiled the leader alive!
Genghis Khan was a great general, always 1 step ahead of his enemies. He had multiple methods of communication, which made his armies more mobile and responsive to his enemy's movements. He also had very trained soldiers Genghis's armies also adopted the strategies and technologies of defeated kingdoms.
Genghis was also a great leader. He kept law ant order through out his lands, and increased china's defense. He killed 10 million people in his conquest, but he redeemed that by stabling governments, and being a good ruler.