Founding of the People's Republic of China
Victorious in the civil war, the Communist Party proclaimed the People's Republic in Beijing. The Nationalist government withdrew to Taiwan.
The Nationalists and Communists, who had cooperated against the warlords in the First United Front of the 1920s, went to war with each other after Chiang Kai-shek’s anti-communist purge of 1927. Hunted by Nationalist forces, the Communists settled in Yan’an after the Long March (1934–1935) and rallied around Mao Zedong. When Japan launched its full-scale invasion, the two parties fought Japan together in the Second United Front, during which the Communists greatly expanded their power in the countryside.
After Japan’s surrender the civil war resumed in 1946. The US-backed Nationalists had the upper hand at first but lost public support through corruption and runaway inflation, while the Communists, who won peasants over with land reform, prevailed in the great campaigns of 1948–1949. On 1 October 1949 Mao proclaimed the People’s Republic of China from the Tiananmen gate, and Chiang’s Nationalist government withdrew to Taiwan in December.
The new government built a socialist system through land reform and nationalisation of industry and allied with the Soviet Union in 1950. When the Korean War broke out that year, China sent the People’s Volunteer Army into the war and so entered a long period of hostility with the United States. The division between the mainland and Taiwan continues today.