and other steppe nations around 200 AD and contemporary continental Asian polities c. 500 AD The
Donghu (or Tung Hu, the Eastern Hu), a Proto-Mongol and/or Tungus group mentioned in Chinese histories as existing as early as the 4th century BC. The language of the Donghu, unlike that of the Xiongnu, is believed by modern scholars to be
Proto-Mongolic. The Donghu were among the first peoples conquered by the Xiongnu. By the 1st century AD, the Donghu had split, along geographical lines in two: the Proto-Mongolic
Xianbei in the north and the
Wuhuan in the south. After the Xiongnu were driven back into their homeland by the Chinese (48 AD), the Xianbei (in particular) began moving (from apparently the north or northwest) into the region vacated by the Xiongnu. By the 2nd century AD, the Xianbei had begun attacking Chinese farms south of the Great Wall, established an empire, which, although short-lived, gave rise to numerous tribal states along the Chinese frontier. Among these states was that of the
Tuoba, a subgroup of the Xianbei, in modern China's
Shanxi Province. The Wuhuan also were prominent in the 2nd century, but they disappeared thereafter; possibly they were absorbed in the Xianbei western expansion. The Xianbei and the Wuhuan used mounted archers in warfare, and they had only temporary war leaders instead of hereditary chiefs. Agriculture, rather than full-scale nomadism, was the basis of their economy. In the 6th century, the Wuhuan were driven out of Inner Asia into the Russian steppe. Chinese control of parts of Inner Asia did not last beyond the opening years of the 2nd century AD, and, as the Eastern Han dynasty ended early in the 3rd century AD, suzerainty was limited primarily to the
Hexi Corridor. The Xianbei were able to make forays into a China beset with internal unrest and political disintegration. By 317 AD all of China north of the
Yangtze River had been overrun by nomadic peoples: the Xianbei from the north; some remnants of the Xiongnu from the northwest; and the Chiang people of
Gansu and
Tibet (present-day China's Xizang Autonomous Region) from the west and the southwest. Chaos prevailed as these groups warred with each other and repulsed the vain efforts of the fragmented Chinese kingdoms south of the Yangtze River to reconquer the region. By the end of the 4th century, the region between the Yangtze and the
Gobi Desert, including much of modern Xinjiang, was dominated by the Tuoba. Emerging as the partially sinicized state of
Dai between 338 and 376 AD in the Shanxi area, the Tuoba established control over the region as the
Northern Wei Dynasty (386–533 AD). Northern Wei armies drove back the
Rouran (referred to as Ruanruan or Juan-Juan by Chinese chroniclers), a newly arising nomadic Mongol people in the steppes north of the
Altai Mountains, and reconstructed the Great Wall. During the 4th century also, the
Huns left the steppes north of the
Aral Sea to invade Europe. By the middle of the 5th century, Northern Wei had penetrated into the
Tarim Basin in Inner Asia, as had the Chinese in the 2nd century. As the empire grew, however, Tuoba tribal customs were supplanted by those of the Chinese, an evolution not accepted by all Tuoba. The Rouran, only temporarily repelled by Northern Wei, had driven the Xiongnu toward the Ural Mountains and the Caspian Sea and were making raids into China. In the late 5th century, the Rouran established a powerful nomadic empire spreading generally farther north of Northern Wei. It was probably the Rouran who first used the title
khan. ==Rise of the Göktürks==