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 ) .

Immediately , the Arabs began Process_start a hasty retreat Escaping to the Jaxartes , pursued Self_motion and harassed Hindering by the Türgesh cavalry .

Finally , after 11 days , the Umayyad army reached Arriving the Jaxartes , where it was caught between the Türgesh and the forces of the native Transoxianian principalities .