Chiang Kai-shek, also known as Chiang Chung-cheng and romanized via Mandarin as Chiang Chieh-shih and Jiang Jieshi, was a Chinese Nationalist politician, revolutionary and military leader who served as the leader of the Republic of China between 1928 and 1975, first in mainland China until 1949 and then in Taiwan until his death.
Born in Chekiang Province, Chiang was a member of the Kuomintang and a lieutenant of Sun Yat-sen in the revolution to overthrow the Beiyang government and reunify China. With help from the Soviets and the Communist Party of China, Chiang organized the military for Sun's Canton Nationalist Government and headed the Whampoa Military Academy. Commander in chief of the National Revolutionary Army, he led the Northern Expedition from 1926 to 1928, before defeating a coalition of warlords and nominally reunifying China under a new Nationalist government. Midway through the Northern Expedition, the KMT–CPC alliance broke down and Chiang purged the communists inside the party, triggering a civil war with the CPC, which he eventually lost in 1949.