The Xueyantuo were an ancient Tiele tribe and khaganate in Northeast Asia who were at one point vassals of the Göktürks, later aligning with the Tang dynasty against the Eastern Göktürks.

A khanate or khaganate is a type of historic polity ruled by a khan, khagan, khatun, or khanum. Khanates were typically nomadic Turkic, Mongol and Tatar societies located on the Eurasian Steppe, politically equivalent in status to kinship-based chiefdoms and feudal monarchies. Khanates and khaganates were organised tribally, where leaders gained power on the support and loyalty of their warrior subjects, gaining tribute from subordinates as realm funding. In comparison to a khanate, a khaganate, the realm of a khagan, was a large nomadic state maintaining subjugation over numerous smaller khanates. The title of khagan, translating as "Khan of the Khans", roughly corresponds in status to that of an emperor.