Xiongnu
The Xiongnu () were a confederation of nomadic peoples who, according to ancient Chinese sources, inhabited the eastern Asian Steppe from the 3rd century BC to the late 1st century AD. Chinese sources report that Modu Chanyu, the supreme leader after 209 BC, founded the Xiongnu Empire.
Five Barbarians
Liaison among the dynasty and groups of herdsmen relied on mutual economic and military benefits. As the Northern Xiongnu, the masters of the Mongolian steppes and mortal enemy of the Han dynasty, were still potent enough during the reigns of Emperor Ming, Emperor Zhang and Emperor He (58–105) to keep the volatile alliance intact, the Eastern Han dynasty enjoyed the most prosperous years of its almost 200 years of existence. Even fragments of the Northern Xiongnu migrated well within the border to the Xihe plain, west of the Yellow River and south of the Ordos Desert).