Overview
Yukuk Shad, a son of the eastern khagan Illig, was raised by the Dulu tribes as Irbis Dulu Qaghan in 639. His violence turned the tribes against him, and the Nushibi, with Tang support, raised Irbis Seguy in 642.
Rise to Power
The Dulu wing brought him in against Ishbara Tolis.
Rule and Achievements
- Fought the Nushibi and attacked Tang protectorates in the west
Legacy
In 642 the Nushibi and the Tang emperor Taizong enthroned Irbis Seguy; Yukuk fled west to Tokharistan.