context: During its heyday, it included vast territories of Central Asia, Southern Siberia, Eastern Europe, the Middle East, China and Tibet. In the second half of the 13th century, the empire began to decay into uluses, headed by Genghisides. The largest fragments of Great Mongolia were the Empire Yuan, the Ulus Juchi (Golden Horde), the state of the Hulaguids and the Chagatai ulus. The Great Khan Khubilai, who took (1271) the title of Emperor Yuan and transferred the capital to Hanbalyk, claimed to be the supremacy over all uluses. By the beginning of the XIV century, the formal unity of the empire was restored in the form of a federation of virtually independent states.
question: Who was the leader of the Mongol Empire?
answers.text: The Great Khan Khubilai