Eastern Göktürks

The Göktürks, the Turks of the inscriptions, built the first state to call itself Turk and ruled the eastern steppe for a century. In 552 Bumin, chief of the iron-working Turks subject to the Rouran, crushed his overlords, took the title of khagan, and within a generation his sons held from Manchuria to the Aral Sea, allied with Persia to destroy the Hephthalites and trading silk with Byzantium through Sogdian middlemen. The empire split in 581–583 into eastern and western khaganates that warred with each other as readily as with China; the Tang played the halves against one another until Li Jing's cavalry took the Eastern khagan in 630 and Su Dingfang finished the Western one in 657. Between the falls rose the Second Khaganate of Ilterish, whose ministers Tonyukuk and Kul Tigin left the Orkhon inscriptions, the oldest Turkic literature, carved in runiform script on the steppe: laments for a people that follows Chinese silk and forgets its name, and counsel that the Turks survive only when their khagan holds the Ötüken forest. The khaganates left Sui and Tang China their frontier system, their cavalry tactics and their fashions, and left the steppe a name, Turk, that outlived every tribe that bore it.