 In the 610, Shekui (r. 610-617) ascended to the Western Turkic throne, both rulers renounced their Kagan ranks and rejoined the Western Türkic Kaganate.The next Western Türkic Tong-Yabgu-Kagan (r. 617-630) annexed all seven tribes of the Xueyantuo-headed Tiele confederation, which also included Uighur, Bayïrku, Ădiz, Tongra, Bugu and Barsil tribes.in 627 Xueyantuo leader led his tribes into the territory of the Eastern Türkic Kaganate, defeated the main force of the Kaganate led by the son of the reigning Illig Qaghan, Yukuk Shad, and settled in the valley of river Tola in the Northern Mongolia.