Xianbei

The Xianbei (Mongolian:Сүнбэ; ,/ʃjɛnˈbeɪ/; simplified Chinese: 鲜卑; traditional Chinese: 鮮卑; pinyin: Xiānbēi) were an ancient nomadic people in northern East Asia who developed a distinct cultural and political identity by the 1st century BC. They inhabited regions spanning parts of present-day northeastern China, Inner Mongolia, and the eastern Eurasian steppe. Several Xianbei groups formed ruling regimes, with early political center around present-day Datong in Shanxi. The Xianbei were likely not of a single ethnicity, but rather a multilingual, multi-ethnic confederation consisting of mainly Proto-Mongols (who spoke either pre-Proto-Mongolic, or Para-Mongolic languages), and, to a minor degree, Tungusic and Turkic peoples. They originated from the Donghu people who splintered into the Wuhuan and Xianbei when they were defeated by the Xiongnu at the end of the 3rd century BC. Following the split, the Xianbei people did not have direct contact with the Han dynasty, residing to the north of the Wuhuan. In the 1st century BC, the Xianbei began actively engaging in the struggle between the Han and Xiongnu, culminating in the Xianbei replacing the Xiongnu on the Mongolian Plateau.

In the mid-2nd century, the chieftain, Tanshihuai unified the Xianbei and waged war against the Han dynasty. His confederation threatened the Han's northern borders for many years, but quickly disintegrated following his death in 181 AD. After suffering several defeats by the end of the Three Kingdoms period, the Xianbei migrated southwards and settled in close proximity to Han society, submitting as vassals to the Chinese dynasties. As one of the so-called "Five Barbarians", they fought as auxiliaries for the Western Jin dynasty during the War of the Eight Princes and the Upheaval of the Five Barbarians before eventually distancing themselves and declaring their autonomy while the Jin were pushed out from northern China. During the Sixteen Kingdoms period, the Xianbei founded several short-lived states and established themselves on the Central Plains.

The Xianbei were at one point all subjected to the Di-led Former Qin dynasty before it fell apart not long after its defeat in the Battle of Fei River. In the wake of the Qin's collapse, the Tuoba formed the Northern Wei dynasty and eventually reunited northern China, ushering China into the Northern and Southern dynasties period. The Northern dynasties, all of which were either led or heavily influenced by the Xianbei, opposed and promoted sinicization at one point or another but tended towards the latter, merging with the general Chinese population by the Tang dynasty. The Northern Wei also arranged for ethnic Han elites to marry daughters of the Tuoba imperial clan in the 480s AD. More than fifty percent of Tuoba Xianbei princesses of the Northern Wei were married to southern Han men from the imperial families and aristocrats from southern China of the Southern dynasties who defected and moved north to join the Northern Wei.