Kaidu

Kaidu was the leader of the House of gedei and the de facto khan of the Chagatai Khanate, a division of the Mongol Empire. He ruled part of modernday Xinjiang and Central Asia during the 13th century, and actively opposed his uncle, Kublai Khan, who established the Yuan dynasty in China, until Kaidus death in 1301. Medieval chroniclers often mistranslated Kadan as Kaidu, mistakenly placing Kaidu at the Battle of Legnica. Kadan was the brother of Gyk, and Kaidus uncle.

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Source: Wikipedia