Mongol Empire Genghis. Kublai successfully took power, but civil war ensued as he sought unsuccessfully to regain control of the Chagatayid and Ögedeid families. During the reigns of Genghis and Ögedei, the Mongols suffered the occasional defeat when a less skilled general was given a command. The Siberian Tumads defeated the Mongol forces under Borokhula around 1215–1217; Jalal al-Din defeated Shigi-Qutugu at the Battle of Parwan; and the Jin generals Heda and Pu'a defeated Dolqolqu in 1230. In each case, the Mongols returned shortly after with a much larger army led by one of their best generals, and were invariably victorious. The
Kublai Khan essence of multiculturalism were Mongols, Semu, Koreans, Hui and Chinese people. Because the Wokou extended support to the crumbling Song dynasty, Kublai Khan initiated invasions of Japan. The court of Goryeo supplied Korean troops and an ocean-going naval force for the Mongol campaigns. Despite the opposition of some of his Confucian-trained advisers, Kublai decided to invade Japan, Burma, Vietnam, and Java, following the suggestions of some of his Mongol officials. He also attempted to subjugate peripheral lands such as Sakhalin, where its indigenous people eventually submitted to the Mongols by 1308 after Kublai's death. Kublai Khan twice attempted to invade