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
Mainland Southeast Asia Mainland Southeast Asia Mainland Southeast Asia, also known as the Indochinese Peninsula and previously as Indochina, is the continental portion of Southeast Asia east of India and south of China that is bordered by the Indian Ocean to the west and the Pacific Ocean to the east. The Indochinese Peninsula projects southward from the Asian continent proper. It contains several mountain ranges extending from the Tibetan Plateau in the north, interspersed with lowlands largely drained by three major river systems running in a north–south direction: the Irrawaddy (serving Myanmar), the Chao Phraya (in Thailand), and the Mekong (flowing through Northeastern