The Period of Tong Yabgu (619-630)              

        But the real repose was in the period of the little grandchild of Tardu, T'ong-Yabgu (619-630). According to the Chinese source T'an-shu, this "clever and brave" khan was "an expert warrior and a distinguished strategist". He took under his control the Töles that were spread over the Orkhun, the River of Tola and the Lake of Aral, defeated Iranians and advanced until the Kandahar in the south. His army was formed by a few hundred of the cavalrymen who knew to string the bow very well.

 

        He was settled in the famous region of Bin-yul (thousand of sources), found in the south-east of the capital Talas 75 km's away. According to Tang-shu, "there was no one seen in the west as powerful as him". During the period of T'ong-Yabgu, who had a friendly relationship with China, Chinese Buddhist priest Hiuen-Tsang, who passed the Gok-Turks' Empire from end to end, visited T'ong-Yabgu and informed about the ways, cities, religious and cultural lives.