Mongol conquest of the Song dynasty Mongol conquest of the Song dynasty The Mongol conquest of the Song dynasty under Kublai Khan (r. 1260–1294) was the final step for the Mongols to rule the whole of China under the Yuan dynasty. It is also considered the Mongol Empire's last great military achievement. Before the Mongol–Jin War escalated, an envoy from the Song dynasty arrived at the court of the Mongols, perhaps to negotiate a united offensive against the Jin dynasty, who the Song had previously fought during the Jin–Song Wars. Although Genghis Khan refused, on his death in 1227 he bequeathed a plan to attack the
Society of the Mongol Empire darughachi and judges in the appanages instead direct distribution without the permission of Great Khan thanks to genius Khitan minister Yelu Chucai. Kublai Khan continued Ögedei's regulations somehow, however, both Güyük and Möngke restricted the autonomy of the appanages before. Ghazan also prohibited any misfeasance of appanage holders in Ilkhanate and Yuan councillor Temuder restricted Mongol nobles' excessive rights on the appanages in China and Mongolia. Kublai's successor and Khagan Temür abolished imperial son-in-law Goryeo King Chungnyeol's 358 departments which caused financial pressures to the Korean people, whose country was under the control of the Mongols. The appanage system was