n medieval Inner Asia. Under the leadership of Bumin Qaghan (d. 552) and his sons, the Ashina succeeded the Rouran Khaganate as the hegemonic power of the Mongolian Plateau and rapidly expanded their territories in Central Asia. Initially the Khaganate would use Sogdian (See my post about these interesting traders) in official and numismatic functions. It was the first Turkic state to use the name Türk politically and is known for the first written record of any Turkic language in history. The first Turkic Khaganate collapsed in 581, after which followed a series of conflicts and civil wars which separated the polity into the Eastern Turkic Khaganate and Western Turkic Khaganate.