Dou Xian
General Dou Xian soon initiated a punitive expedition against the remaining hostile Xiongnu tribes, subsequently causing the tribes to flee westwards. Dou Xian had reported that the "Northern Chanyu" was so weak there was no point in treating with him further. In February 91, he mounted a final invasion, with two of his generals Geng Kui and Ren Shang in charge. They advanced from Juyan and defeated the Northern Xiongnu ruler, captured his mother and killed 5,000 of his armies, drove him in flight again to the west from Altayn Nuruu. He was not heard from again. The rest of the Xiongnu left in Dzungaria, specifically near Lake Barkol, had not been directly affected, and some part of the shattered polity was reconstructed under a new chanyu. The new chanyu, however, was killed in 93, and after him no chanyu of the Northern Xiongnu was ever heard of again. On the frontier of China which faced present day Mongolia, the hostile Xiongnu state was ended.