The Chinese Communist Revolution, known in mainland China as the War of Liberation, was the conflict, led by the Chinese Communist Party (CCP) and Chairman Mao Zedong, that resulted in the proclamation of the People's Republic of China, on 1 October 1949. The revolution began in 1946 after the Second Sino-Japanese War (1937–45) and was the second part of the Chinese Civil War (1945–49).