China is one of the members of the United Nations and is one of five permanent members of its Security Council. One of the victorious Allies of World War II (the Chinese theatre of which was the Second Sino-Japanese War), the Republic of China (ROC) joined the UN as one of its founding member countries in 1945. The subsequent resumption of the Chinese Civil War between the government of Republic of China and the rebel forces of the Chinese Communist Party, led to the latter's victory on the mainland and the establishment of the People's Republic of China (PRC) in 1949. Nearly all of mainland China was soon under its control and the ROC government (then referred to in the West as "Nationalist China") retreated to the island of Taiwan.
The One-China policy advocated by both governments dismantled the solution of dual representation but, amid the Cold War and Korean War, the United States and its allies opposed the replacement of the ROC at the United Nations until 1971, although they were persuaded to pressure the government of the ROC to accept international recognition of Mongolia's independence in 1961. The PRC sought to be recognized by the United Nations from the 1950s, but at least until 1961, the United States managed to keep the PRC out of the UN. The General Assembly Resolution 1668 which demanded a majority of two thirds for the recognition of new members was adopted in 1961. Canada and other allies of the United States individually shifted their recognitions of China to the PRC, which the US opposed. Some attempted to recognize both Chinas separately, which both Chinas opposed, each declaring itself the only legitimate representative of China. Annual motions to replace the ROC with the PRC were introduced first by the Soviet Union, then India and also Albania, but these were defeated.
