A Turkic tribal confederation that broke from the Western Turkic Khaganate and briefly dominated the Mongolian steppe, allying with Tang China to help destroy the Eastern Turkic Khaganate in 630 before itself being crushed by Tang and Uyghur forces in 646.
Destroyed by a joint Tang-Uyghur campaign in 646 CE; its territory passed into the Tang tributary system and, later, Uyghur hands.
The classic narrative of the Inner Asian steppe, covering the Xueyantuo interregnum between the Turkic khaganates.