The Umayyads under the governor of Khurasan , Asad ibn Abdallah al-Qasri , had invaded Attack the principality of Khuttal in Transoxiana , and the local ruler Control called Request upon the Türgesh for aid Assistance .

The `` Day of Thirst '' ( , `` Yawm al-aṭash '' ) is the name Name_conferral traditionally given in Name_conferral Arabic historiography to a battle fought Hostile_encounter in 724 between the Turkic Türgesh khaganate and the Umayyad Caliphate on the banks of the river Jaxartes , in Transoxiana ( in modern Tajikistan , Central Asia ) .

The Umayyad conquest of Transoxiana had been undone in the 720s by the uprisings of the local Soghdian princes and the Türgesh invasions Attack .

By 729 , the small fortress of Kamarja near Samarkand ( in modern Uzbekistan ) was one of the last remaining Presence Arab strongholds in Transoxiana , when it was attacked Attack by the Türgesh under the personal direction of their ruler , Suluk .

It was only following Self_motion the collapse of the Türgesh khaganate after 738 that the Arabs re-established Recovering their rule over Transoxiana .