Battle of Talas
The last major victory of Arabs in Central Asia occurred at the Battle of Talas (751). The Tibetan Empire was allied to the Arabs during the battle against the Chinese Tang dynasty. Because the Arabs did not proceed to Xinjiang at all, the battle was of no importance strategically, and it was An Lushan's rebellion which ended up by forcing the Tang out of Central Asia. Despite the conversion of some Karluk Turks after the Battle of Talas, the majority of Karluks did not convert to Islam until the mid-10th century, when they established the Kara-Khanid Khanate.