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.
History of Mongolia
In 48 AD, the Xiongnu empire was weakened as it was divided into the southern and northern Xiongnu. The northern Xiongnu migrated to the west. They established Üeban state (160–490) in modern Kazakhstan and Hunnic Empire (370s–469) in Europe. The Xianbei that were under the Xiongnu rebelled in 93 AD, ending the Xiongnu domination in Mongolia.