Tibet was a de facto independent state in East Asia that lasted from the collapse of the Manchu-led Qing dynasty in 1912 until its annexation by the People's Republic of China in 1951.

Tibet came under the control of People's Republic of China (PRC) after the Government of Tibet signed the Seventeen Point Agreement which the 14th Dalai Lama ratified on 24 October 1951, but later repudiated on the grounds that he had rendered his approval for the agreement under duress. This occurred after attempts by the Tibetan Government to gain international recognition, efforts to modernize its military, negotiations between the Government of Tibet and the PRC, and a military conflict in the Chamdo area of western Kham in October 1950. The series of events came to be called the "Peaceful Liberation of Tibet" by the Chinese government, and the "Chinese invasion of Tibet" by the Central Tibetan Administration and the Tibetan diaspora.