Uyghurs
The history of the Uyghur people, as with the ethnic origin of the people, is a matter of contention between Uyghur nationalists and the Chinese authority. Uyghur historians viewed the Uyghurs as the original inhabitants of Xinjiang with a long history. Uyghur politician and historian Muhemmed Imin Bughra wrote in his book "A History of East Turkestan", stressing the Turkic aspects of his people, that the Turks have a 9000-year history, while historian Turghun Almas incorporated discoveries of Tarim mummies to conclude that Uyghurs have over 6400 years of history, and the World Uyghur Congress claimed a 4,000-year history in East Turkestan. However, the official Chinese view asserts that the Uyghurs in Xinjiang originated from the Tiele tribes and only became the main social and political force in Xinjiang during the ninth century when they migrated to Xinjiang from Mongolia after the collapse of the Uyghur Khaganate, replacing the Han Chinese they claimed were there since the Han Dynasty. Many contemporary Western scholars, however, do not consider the modern Uyghurs to be of direct linear descent from the old Uyghur Khaganate of Mongolia. Rather, they consider them to be descendants of a number of peoples, one of them the ancient Uyghurs.
History of Xinjiang
Uyghur nationalist historians such as Turghun Almas claim that Uyghurs were distinct and independent from Chinese for 6000 years, and that all non-Uyghur peoples are non-indigenous immigrants to Xinjiang. However, the Han Dynasty (206 BC – 220 AD) established military colonies (tuntian) and commanderies (duhufu) to control Xinjiang from 120 BC, while the Tang dynasty (618–907) also controlled much of Xinjiang until the An Lushan rebellion. Chinese historians refute Uyghur nationalist claims by pointing out the 2,000-year history of Han settlement in Xinjiang, documenting the history of Mongol, Kazakh, Uzbek, Manchu, Hui, Xibo indigenes in Xinjiang, and by emphasizing the relatively late "westward migration" of the Huigu (equated with "Uyghur" by the PRC government) people from Mongolia the 9th century. The name "Uyghur" was associated with a Buddhist people in the Tarim Basin in the 9th century, but completely disappeared by the 15th century, until it was revived by the Soviet Union in the 20th century.