The Mongol Conquest refers to the series of military campaigns led by the Mongol Empire in the 13th century, primarily under the leadership of Genghis Khan. This expansion began around 1206 and resulted in the establishment of one of the largest contiguous empires in history, stretching from East Asia to Eastern Europe. The conquests involved the subjugation of various territories, including the Khwarezmian Empire and parts of China. The Mongols were known for their highly mobile cavalry and innovative tactics, which allowed them to defeat larger armies and capture key cities, significantly impacting the regions they invaded.