Huo Qubing
In 121 BC, the Han dynasty general Huo Qubing defeated the eastern wing of the Xiongnu. He then settled the Wuhuan in five commanderies (Shanggu, Yuyang, Youbeiping, Liaoxi and Liaodong) created on the northern Chinese border in order to use them to keep watch of the Xiongnu. The chieftains of the Wuhuan paid annual visits to the Han capital Chang'an and were given rewards.