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
First Taiwan Strait Crisis of southeastern China. Hainan island fell to the Communists in April 1950 and the Choushan islands were evacuated by the Nationalists in May 1950, even before the First Taiwan Strait Crisis. The Matsu and Kinmen island groups, situated in the Taiwan Strait just off the coast of the Chinese mainland, were the Nationalists' first line of defense against the Communist Party of China and were heavily fortified by Chiang. The islands off the shore of Zhejiang province were seen as a foothold to recover the mainland and housed the reduced provincial government of Chiang's native province. While the United States