The history of the region has become highly politicised, with both Chinese and nationalist Uyghur historians frequently overstating the extent of their groups' respective ties to the region. In reality, it has been home to many groups throughout history, with the Uyghurs arriving from Central Asia in the 10th century. Although various Chinese dynasties have at times exerted control over parts of what is now Xinjiang, the region as it exists today came under Chinese rule as a result of the westward expansion of the Manchu-led Qing dynasty, which also saw the annexation of Mongolia and Tibet.