The Mongols, a nomadic people from the Central Asian steppes, invaded northern China in the 13th century under the leadership of Genghis Khan. Their highly mobile cavalry and innovative tactics overwhelmed the Jin Dynasty and later the Southern Song, leading to the establishment of the Yuan Dynasty (1271–1368) under Kublai Khan. The Mongol conquests reshaped Chinese history, facilitated East-West exchange along the Silk Road, and left a lasting legacy on the region's demographics and culture.