When did the Xiongnu exist?
Xiongnu
3rd century BC to the late 1st century AD
The Xiongnu [ɕjʊ́ŋ.nǔ] (Chinese:匈奴; Wade–Giles:Hsiung-nu) were a confederation[3] 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 209BC, founded the Xiongnu Empire.[4]