The Chinese Revolution began with the May 4th Movement in 1919 and established nationalism in China. Sun Yat-sen led the nationalist Kuomintang party and allied with the Chinese Communist Party to unite China against warlords. Chiang Kai-shek took control of the KMT and unified China through military force but then ordered a massacre of Communist Party members. The Long March from 1934-1935 saw the Communist Party flee to the countryside to escape the KMT, establishing Mao Zedong as their leader. World War 2 saw a brief alliance against Japan but then the Chinese Civil War resumed until 1949 when Mao declared the People's Republic of China, establishing communist rule. Mao instituted social, political and economic