Genghis Khan had history's largest empire.
 Once over the mountains, Genghis Khan dispatched a detachment of 20,000-30,000 men led by his son Jochi and elite general Jebe to raid into the fertile Fergana Valley in the eastern part of the Khwarezmian Empire
 Having spent the majority of his life uniting the Mongol tribes, he launched a series of military campaigns which conquered large parts of China and Central Asia

