Nomadic empire
The Xiongnu were a confederation of nomadic tribes from Central Asia with a ruling class of unknown origin and other subjugated tribes. They lived on the Mongolian Plateau between the 3rd century BC and the 460s AD, their territories including modern day Mongolia, southern Siberia, western Manchuria, and the modern Chinese provinces of Inner Mongolia, Gansu, and Xinjiang. The Xiongnu was the first unified empire of nomadic peoples. Relations between early Chinese dynasties and the Xiongnu were complicated and included military conflict, exchanges of tribute and trade, and marriage treaties. When Emperor Qin Shihuang drove them away from the south of the Yellow River, he built the famous Great Wall to prevent the Xiongnu from coming back.
Xiongnu
In various kinds of ancient inscriptions on monuments of Munmu of Silla, it is recorded that King Silla came from Xiongnu. Also, there are some Korean researchers point out grave goods of Silla and Xiongnu are alike and also some researchers propose that Silla King is descended from Xiongnu. The Korean traditional cloth Hanbok shows some Iranian influence. The royal Crowns of Silla are identical to Persian Crowns found in today Afghanistan. About this, the Korean public broadcaster KBS has reported a documentary.