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
Division of the Mongol Empire The transition of the capital of the Mongol Empire to Khanbaliq (Dadu, modern-day Beijing) by Kublai Khan in 1264 was opposed by many Mongols. Thus, Ariq Böke's struggle was for keeping the center of the Empire in Mongolia homeland. After Ariq Böke's death, the struggle was continued by Kaidu, a grandson of Ogedei Khan and lord Nayan. By eliminating the Song dynasty, Kublai Khan completed the conquest of China. The fleets of the Yuan dynasty attempted to invade Japan in 1274 and 1281, but both invasion failed, and a large number of their ships were destroyed in sea storms named