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
History of the administrative divisions of China (1912–49) of pro-independence President Chen Shui-bian (2000–2008) did not actively claim sovereignty over all of China, Thus, the claimed area of the ROC continues to include mainland China, several off-shore islands, and Taiwan. Beginning in 2006, the ROC Yearbook, under Chen's administration, ceased displaying official administrative divisions in mainland China. It recognized two provinces (Taiwan and Fukien) and two special municipalities (Taipei and Kaohsiung). President Ma Ying-jeou reasserted the ROC's claim to be the sole legitimate government of China and the claim that mainland China is part of ROC's territory. He does not, however, actively seek reunification, and prefers to maintain