History of the Republic of China its remaining islands in Fujian as vital for any future campaign to defeat the PRC and retake mainland China. On 3 September 1954, the First Taiwan Strait Crisis began when the PLA started shelling Quemoy and threatened to take the Dachen Islands. On 20 January 1955, the PLA took nearby Yijiangshan Island, with the entire ROC garrison of 720 troops killed or wounded defending the island. On January 24 of the same year, the United States Congress passed the Formosa Resolution authorizing the President to defend the ROC's offshore islands. The First Taiwan Straits crisis ended in March 1955 when
Free area of the Republic of China such constitutional changes, the Republic of China's official borders were to be regarded as all of mainland China in addition to the territories it controlled. (Until the mid-2000s, maps published in Taiwan depicted mainland provincial and national boundaries as they were in 1949, disregarding changes by the Communist administration post-1949.) While the 1991 revisions of the Constitution granted the sovereignty rights to the Taiwanese people, it did not explicitly name Taiwan and instead used the term "free area" to maintain the notion that the Republic of China encompassed more than Taiwan. In ordinary legislation, the term "Taiwan Area" is usually