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
Taiwan, China Since then, two Chinas have existed, although the PRC was not internationally recognized at the time. The Republic of China government, who received Taiwan in 1945 from Japan then fled in 1949 to Taiwan with the aim to retake mainland China and retained the name "Republic of China". Both the ROC and the PRC still officially (constitutionally) claim mainland China and the Taiwan Area as part of their respective territories. In reality, the PRC rules only Mainland China and has no control of but claims Taiwan as part of its territory under its "One China Principle". The ROC, which only