Battle of Talas River (Abbassids vs Tang Empire)

During July 751 CE, newly formed Abbassid Caliphate in Middle East clashes with Chinese Tang Empire from the Far East near Talas River in Central Asia (present Day Kyrgyzstan & Kazakhstan border). The Battle initially come from local feud with each of the disputing parties were client state of Abbassid Caliphate (Arab-Persian) and Chinese Tang Empire.The battle also involve Tibetan Empire which allied themselves with Abbassid against their common enemy, Chinese Tang Empire.
The Abbassid Forces led by Governor of Samarkand, Ziyad Ibn Salih combined with Tibetan Empire Forces numbering 200.000. While Chinese Tang Forces led by Korean General Go Seon Ji (Gao Xian Zhi) were numbering 100.000 with thousands Ferghana and Turkic-Qarluks allies at their disposal.
The battle was important to determine the future of influence of Central Asia (Turkestan) as neither of the both power wanted a war with tremendous logistical problem (regarding distance and knowledge of the area) and disrupt the lucrative Silk trade route.
While Abbassids and Tang forces engaged in battle for five days, the final blow were carried out by Qarluks Turks. They switches sides to the Abbassid during the height of the battle and attacking Tang forces from the rear, while Abbassid attacks from the front. Surrounded by both direction, Tang forces were utterly destroyed. Go Seon Ji able to withdraw with fraction of his army.
Further rebellion by Tang Turkic General An Lushan in 755 forced Tang to withdraw their forces to interior China. While Abbassid (Arab-Persian) Influence permeated Central Asia.