Original:  By 1949, the KMT was decisively defeated by the Chinese Communist Party in the Chinese Civil War and withdrew the Nationalist government to Taiwan, which was restored to the ROC at the end of World War II.
Revised:  By 1949, the KMT was decisively defeated by the Chinese Communist Party in the Chinese Civil War and withdrew the Nationalist government to Taiwan, a former Qing prefecture-turned-Japanese colony that ruled from 1895 to 1945.
Edit intent: meaning-changed