Turkic Khaganate
In 552, the Göktürks took over Mongolia, formed the First Turkic Khaganate, and by 558 reached the Volga. Circa 555–567, the Turks of the First Turkic Khaganate and the Sasanians under Khosrow I allied against the Hephthalites and defeated them after an eight-day battle near Qarshi, the Battle of Bukhara, perhaps in 557.