Mongol Empire
The Mongol Empire of the 13th and 14th centuries was the largest contiguous land empire in history and the second largest empire by landmass, second only to the British Empire. Originating in Mongolia in East Asia, the Mongol Empire at its height stretched from the Sea of Japan to parts of Eastern Europe, extending northward into parts of the Arctic; eastward and southward into the Indian subcontinent, Mainland Southeast Asia and the Iranian Plateau; and westward as far as the Levant and the Carpathian Mountains. The Mongol Empire emerged from the unification of several nomadic tribes in the Mongol homeland under the leadership of Genghis Khan, whom a council proclaimed as the ruler of all Mongols in 1206. The empire grew rapidly under his rule and that of his descendants, who sent out invading armies in every direction.