The White Terror (Chinese: 白色恐怖; pinyin: Báisè Kǒngbù; Pe̍h-ōe-jī: Pe̍h-sek Khióng-pò͘) was the political repression of Taiwanese civilians and political dissenters under the government ruled by the Kuomintang (KMT). The period of White Terror is generally considered to have begun when martial law was declared in Taiwan on 19 May 1949, which was enabled by the 1948 Temporary Provisions against the Communist Rebellion, and ended on 21 September 1992 with the repeal of Article 100 of the Criminal Code, allowing for the prosecution of "anti-state" activities. The Temporary Provisions had been repealed a year earlier on 22 April 1991. Martial law had been lifted on 15 July 1987.
Two years after the 28 February incident, the KMT retreated from mainland China to Taiwan during the closing stages of the Chinese Civil War in 1949. Wanting to consolidate its rule on its remaining territories, the KMT imposed harsh political suppression measures, which included enacting martial law, executing suspected leftists or those they suspected to be sympathetic toward the communists. Others targeted included Taiwanese locals and indigenous peoples who participated in the 28 February incident, such as Uyongʉ Yata'uyungana, and those accused of dissidence for criticizing the government.