 The Tibetans subjugated Kashgar in 676-678 and retained possession until 693, when China regained control of southern Xinjiang, and retained it for the next fifty years, though under constant threat from Tibetan and Turkic forces.The Tang were not able to intervere beyond the Pamir Mountains, where Arab forces were moving into Bactria, Ferghana and Soghdiana in the early 8th century, and had no direct influence on the fights between Turks, Tibetans and Arabs for control over Central Asia.Tang outposts were repeatedly attacked by Tibetans and the Türgesh, and in 736 Tibet conquered the Pamir regio.