Major combat in the Chinese Civil War ended in 1949 with the Communist Party in control of most of mainland China, and the Kuomintang retreating offshore to Taiwan, reducing its territory to only Taiwan, Hainan, and their surrounding islands. On 1 October 1949, Communist Party of China Chairman Mao Zedong formally proclaimed the establishment of the People's Republic of China at the new nation's founding ceremony and inaugural military parade in Tiananmen Square, Beijing. In 1950, the People's Liberation Army captured Hainan from the ROC and incorporated Tibet. However, remaining Kuomintang forces continued to wage an insurgency in western China throughout the 1950s.