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The Yenisei Kyrgyz destroy the Uyghur Khaganate

In 840, after a palace coup, famine and a disastrous winter had weakened the Uyghurs, a rebel Uyghur commander led the Yenisei Kyrgyz against the Uyghur capital on the Orkhon: the khagan was killed and his court burned. The Uyghur tribes scattered — west to the Karluks, to Tibet and the Tarim oases, south to the Chinese frontier — and the empire that had ruled the Mongolian steppe for nearly a century came to an end.

Date
840year known
Place
Ordu-Baliq (Karabalgasun)today: Khar Balgas ruins in the Orkhon valley, Khotont district, Arkhangai Province, Mongolia · Central and Northern Asia
Route
Lands of the Yenisei Kyrgyz (Minusinsk Basin) → Ordu-Baliq (Karabalgasun)
Participants
Yenisei Kyrgyz, Uyghur Khaganate, Karluks, Tang dynasty
Threads
Central Asia and the steppe (6th–10th c.)
Also known as
Fall of the Uyghur Khaganate; Kyrgyz conquest of Ordu-Baliq; Zhangxin Qaghan; Hesa Qaghan; Qasar Qaghan; Jueluowu; Julu Mohe; Wujie Qaghan; Ögä Qaghan; Princess Taihe; Падение Уйгурского каганата; Чжансинь-каган; Хэса-каган; Цзюэлоу; Цзюйлу Мохэ; Уцзе-каган; Царевна Тайхэ; 黠戛斯; 烏介可汗

The Kyrgyz of the upper Yenisei had been subdued by the Uyghurs in 758, but according to the Zizhi tongjian, once Uyghur power declined their ruler, the A-re, took the title of khagan, and for more than twenty years Uyghur armies fought him without success; he taunted the Uyghur khagan: “Your fortune is spent — I shall surely take your golden tent!” In 839 the Uyghur court fell into strife: after a failed plot against Zhangxin Qaghan, the minister Jueluowu, helped by Shatuo Turks whom he had hired for three hundred horses, attacked the khagan, who killed himself, and Hesa Tegin was raised in his place. The same year, the Tang histories say, famine and epidemic struck, and heavy snow killed many of the Uyghurs’ sheep and horses.

In 840 a Uyghur commander, Julu Mohe, an enemy of Jueluowu, went over to the Kyrgyz and led them — a hundred thousand horsemen, by the count of the Tang histories — against the Uyghur capital, usually identified with Ordu-Baliq on the Orkhon. They killed the khagan and Jueluowu and burned the khagan’s camp to the ground. The Uyghurs fled in all directions: fifteen tribes under the minister Sazhi and Prince Pang went west to the Karluks, other groups to Tibet and to Anxi in the Tarim Basin, and thirteen tribes that camped near the khagan proclaimed Wujie khagan and moved south to the Tang frontier. The Kyrgyz captured the Tang princess Taihe, who had been married to the Uyghur khagan in 821; claiming descent from the Han general Li Ling, and so kinship with the Tang imperial house of Li, they sent her back towards China, but Wujie intercepted her escort and kept the princess with him.

Wujie’s Uyghurs raided the frontier until in 843 the Tang general Shi Xiong surprised his camp, freed the princess and routed them; in 846 Wujie was killed by one of his own ministers, and by 848 the last Uyghurs in the east had been dispersed. The Tang recognised the Kyrgyz ruler as khagan in 847, but according to Michael Drompp the Kyrgyz kept their centre on the Yenisei and did not hold the Mongolian plateau for long; in the 10th century the Khitans extended their power over it. The Uyghurs who went west founded new states at Ganzhou in Gansu and in the Turfan oasis (Qocho), where Manichaeism long survived beside Buddhism. In China the fall of the khaganate deprived the Manichaeans of their protectors: from 843 the Tang suppressed their temples, a prelude to the persecution of Buddhism and other foreign religions in the Huichang era.

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Sources

  1. Wikipedia (English): Uyghur Khaganate
  2. Wikipedia (English): Yenisei Kyrgyz
  3. Wikipedia (English): Kyrgyz Khaganate
  4. Wikipedia (Russian): Уйгурский каганат
  5. Wikipedia (Russian): Енисейские кыргызы
  6. Сыма Гуан. Цзычжи тунцзянь, гл. 246–248.
  7. Лю Сюй и др. Цзю Тан шу (Old Book of Tang), гл. 195: жизнеописание уйгуров.
  8. Оуян Сю, Сун Ци. Синь Тан шу (New Book of Tang), гл. 217Б: жизнеописания уйгуров и кыргызов.
  9. Drompp M. R. Tang China and the Collapse of the Uighur Empire: A Documentary History. — Leiden; Boston: Brill, 2005. — (Brill’s Inner Asian Library; vol. 13).