1206, Genghis Khan established the Mongolian khanate. Since then, Mongolian fighters have traversed Europe and Asia, explored the west in the east, and successively wiped out Western Liao, Xixia, Jin Dynasty, Dali and Southern Song Dynasty, and conquered Tubo, ending the division of China for more than 300 years, realizing the unprecedented unification in the history of China, and establishing the four great khanates in Eurasia.