The area of what is now Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Rouran, the Xianbei, the Gökturks, and others. The Mongol Empire was founded by Chinggis Khaan in 1206. After the collapse of the Yuan Dynasty, the Mongols returned to their earlier patterns of internal strife. In the 16th and 17th centuries, Mongolia came under the...