Chinese nationalist rule began in October 1945 after the end of World War II. During the immediate postwar period, the Nationalist Chinese Kuomintang (KMT) administration on Taiwan was repressive and extremely corrupt compared with the previous Japanese rule, leading to local discontent. Anti-mainlander violence flared on February 28, 1947, prompted by an incident in which a cigarette seller was injured and a passerby was accidently shot dead by Nationalist authorities.

For several weeks after the February 28 Incident the rebels held control of much of the island. Feigning negotiation the Nationalists assembled a large military force (carried on United States naval vessels) that attacked Taiwan massacring nearly 30,000 Taiwanese and imprisoning thousands of others.

The killings were both random and premeditated as local elites or educated Taiwanese were sought out and disposed of. Many of the Taiwanese who had formed home rule groups under the Japanese were the victims of 2-28. This was followed by the "White Terror" in which many thousands of Taiwanese were imprisoned or executed for their real or perceived opposition to the Kuomintang military regime, leaving many native Taiwanese with a deep-seated bitterness to the mainlanders. Until 1995, the KMT authorities suppressed accounts of this episode in Taiwan history. In 1995 a monument was dedicated to the victims of the "2-28 Incident", and for the first time the ROC President Lee Teng-hui publicly apologized for the Nationalists' brutality