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 Siege of Kamarja was fought Hostile_encounter in 729 between the Arab Muslims of the Umayyad Caliphate and the Türgesh khaganate , along with its Soghdian allies .

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