Uyghurs
Contemporary scholars consider modern Uyghurs to be the descendants of a number of people, including the ancient Uyghurs of Mongolia who arrived at the Tarim Basin after the fall of the Uyghur Khaganate, Iranic Saka tribes, and other Indo-European peoples who inhabited the Tarim Basin before the arrival of the Turkic Uyghurs. DNA analyses indicate that the peoples of central Asia such as the Uyghurs are all mixed Caucasian and East Asian. Uyghur activists identify with the Tarim mummies, remains of an ancient people who inhabited the region, but research into the genetics of ancient Tarim mummies and their links with modern Uyghurs remains problematic, both to Chinese government officials concerned with ethnic separatism, and to Uyghur activists concerned that the research could affect their people's claim of being indigenous to the region.
Uyghurs
The 12th and 13th century saw the domination by non-Muslim powers: first the Kara-Khitans in the 12th century, followed by the Mongols in the 13th century. After the death of Genghis Khan in 1227, Transoxiana and Kashgar became the domain of his second son, Chagatai Khan. The Chagatai Khanate split into two in the 1340s, and the area of the Chagatai Khanate where the modern Uyghurs live became part of Moghulistan, which meant "land of the Mongols". In the 14th century, a Chagatayid khan Tughluq Temür converted to Islam. His son Khizr Khoja conquered Qocho and Turfan (the core of Uyghuristan) in the 1390s, and the Uyghurs there became largely Muslim by the beginning of the 16th century. After being converted to Islam, the descendants of the previously Buddhist Uyghurs in Turfan failed to retain memory of their ancestral legacy and falsely believed that the "infidel Kalmuks" (Dzungars) were the ones who built Buddhist structures in their area.