Who was Chiang Kai-Shek?

Chiang Kai-Shek took over the Kuomingtang after Sun Yat-Sen's death. He eventually reunited China in 1928. During the 1920's he did not trust the Communist party and purged them from all government positions. He was the President and commander in chief of all the Chinese forces during WW2 and the Chinese Civil War. After the defeat on mainland China, he set up the KMT government on Taiwan and became President until his death.

Answer:

beginning in the 1920s the Chinese communists led by Mao Zedong waged a civil war against the nationalist government of Chiang Kai-Shek