Tardu

…(ruler) of the western Turks, Tardu. Throughout his reign Wendi also pursued a policy of encouraging factional strife among the eastern Turks. At the same time, he strengthened his defenses in the north by repairing the Great Wall. In the northwest in the area around the Koko Nor (Qinghai Hu;…

Under Ishtemi’s successor, Tardu (573–603), the western Kök Türk empire continued to thrive and, in its westward expansion, reached the borders of Byzantium. By that time the eastern Kök Türk empire was facing grave difficulties caused partly by internal strife and partly by the vigorous Central Asian policies…