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
Politics of the Republic of China population descends from Han Chinese who migrated from mainland China between 1661 and 1895. Another significant fraction descends from Han Chinese who immigrated from mainland China in the 1940s and 1950s. But between 1895 and the present, Taiwan and mainland China have shared a common government for only 4 years. The shared cultural origin combined with several hundred years of geographical separation, some hundred years of political separation and foreign influences, as well as hostility between the rival Taiwan and China have resulted in national identity being a contentious issue with political overtones. Since democratization and the lifting of martial