Major combat in the Chinese Civil War ended in 1949 with the Communist Party in control of mainland China, and the Kuomintang retreating offshore, reducing the ROC’s territory to only Taiwan, Hainan, and their surrounding islands. On 1 October 1949, Communist Party Chairman Mao Zedong proclaimed the establishment of the People’s Republic of China. In 1950, the People’s Liberation Army succeeded in capturing Hainan from the ROC, occupying Tibet,  and defeating the majority of the remaining Kuomintang forces in mainland China.