sentences:  630 he was murdered by Külüg Sibir, his uncle and a partisan of the Dulu faction.Following the death of Tong Yabghu, the might of the Western Göktürks largely collapsed.Although the khaganate lingered for a few decades before falling to the Chinese Empire, many of the client tribes became independent and a number of successor states, including the Khazar Khaganate and Great Bulgaria, became independent.