A History of the Mongolian Empire

The Donghu are mentioned by Sima Qian as already existing in Inner Mongolia north of the state of Yan in 699–632 BC along with the Shanrong people. Mentions in the Lost Book of Zhou (Yizhoushu) and the Shanhaijing indicate the Donghu were also active during the Shang dynasty (1600–1046 BC). The Mongolic-speaking Xianbei formed part of the Donghu confederation, but had earlier times of independence, as evidenced by a mention in the Guoyu ("晉語八" section) which states that during the reign of King Cheng of Zhou (reigned 1042–1021 BC) the Xianbei came to participate at a meeting of Zhou subject-lords at Qiyang (岐阳) (now Qishan County) but were only allowed to perform the fire ceremony under the supervision of Chu (楚), since they were not vassals by covenant (诸侯). The Xianbei chieftain was appointed joint guardian of the ritual torch along with Xiong Yi. These early Xianbei came from the nearby Zhukaigou culture (2200–1500 BC) in the Ordos Desert where maternal DNA corresponds to Daurs and Evenks. The Zhukaigou Xianbei (part of the Ordos culture of Inner Mongolia and northern Shaanxi) had trade relations with the Shang dynasty (1600–1046 BC). In the late 2nd century the Han Dynasty scholar Fu Qian (服虔) wrote in his commentary "Jixie" (集解) that "Shanrong and Beidi are ancestors of the present-day Xianbei". Again in Inner Mongolia another closely connected core Mongolic Xianbei region was the Upper Xiajiadian culture (1000–600 BC) where the Donghu confederation was centered.
After the Donghu were defeated by Modu Chanyu the Xianbei and Wuhuan survived as the main remnants of the confederation. Tadun Khan of the Wuhuan (died 207 AD) was the ancestor of the proto-Mongolic Kumo Xi.[16] The Wuhuan are of the direct Donghu royal line and the ...

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... rise of the Gok-Turks in 555, the Uyghurs in 745 and the Yenisei Kirghizs in 840. The Tuoba were eventually absorbed into China. The Rouran fled west from the Gok-Turks and either disappeared into obscurity or, as some say, invaded Europe as the Avars under their Khan Bayan I. Some Rouran under Tatar Khan migrated east founding the Tatar tribes, who became part of the Shiwei. The Khitan, who were independent after their separation from the proto-Mongolic Kumo Xi (of Wuhuan origin) in 388 AD, continued as a minor power in Manchuria until one of them, Abaoji (872–926), established the Khitan Liao Dynasty (907–1125). The Khitan fled west after their defeat by the Tungusic Jurchens (later known as Manchus) and founded the Kara-Khitan or Western Liao dynasty (1125–1218) in eastern Kazakhstan. In 1218 Genghis Khan destroyed the Kara-Khitan Kingdom after which the Khitan p