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.
Former Zhao
By the 280s, a huge number (approximately 400,000) of Xiongnu herdsmen resided in the Ordos Desert and Bing, a political division including modern-day areas of the whole Shanxi province, southwestern part of Inner Mongolia and eastern part of Shaanxi province, after Cao Cao moved them there and split them into "five departments" (五部, pinyin Wǔbù). The Southern Xiongnu continued their nomadic lifestyles of the steppes with horse breeding and to some extent agriculture. In spite of significant loss of Chinese sedentary population, the Chinese portion of the population in the state is estimated to be around 1,500,000. In addition to the Southern Xiongnu nomads, the state numbered 1,000,000 of other nomadic tribes, mainly Jie, Xianbei, Di, and Qiang, for a total of approximately 1,400,000 nomadic population, or 200 thousand yurts.