 The khagan also had a summer capital in Navekat near the springs north of Tashkent in the Talas Valley, the capitals are being noted as the westernmost capital of Western Turkic Khaganate.There was a sort of symbiosis, with the Sogdians responsible for economical prosperity and the Gokturks in charge of the city's military security.Following the downfall of the khaganate, Suyab was absorbed into the Tang Empire, of which it was a western military outpost between 648 and 719.