Ashina Helu
In 630, Ashina Helu, the Ishbara Qaghan of the Eastern Turkic Kaganate, was captured by the Chinese. His heir apparent, the "lesser Khan" Hubo, escaped to Altai with a major part of the people and 30,000 soldiers. He conquered the Karluks in the west, the Kyrgyz in the north, and took the title Yizhuchebi Khagan. The Karluks allied with the Tiele and their leaders the Uyghurs against the Turkic Kaganate, and participated in enthroning the victorious head of the Uyghur (Toquz Oghuz). After that, a smaller part of the Karluks joined the Uyghurs and settled in the Bogdo-Ola mountains in Mongolia, the larger part settled in the area between Altai and the eastern Tien Shan.