Mongol invasion of the Khwarazmian Empire: Genghis Khan defeated the renegade Khwarazmian prince Jalal al-Din at the Battle of the Indus. Genghis Khan: Genghis Khan, also known as Chinggis Khan, was the founder and first khan of the Mongol Empire. After spending most of his life uniting the Mongol tribes, he launched a series of military campaigns, conquering large parts of China and Central Asia. November 24, 1221. Wiki link