Republic of Formosa
The Republic of Formosa survived for only five months. The Japanese landed near Keelung on the northern coast of Taiwan on 29 May 1895, and in a five-month campaign swept southwards to Tainan. During the night of 4 June, on the news that the Japanese had captured Keelung, President T'ang and General Chiu fled to Tamsui, and from there sailed for the mainland on the evening of 6 June. The Japanese entered Taipei shortly afterwards.
Taiwan
The island of Taiwan, formerly known as Formosa, was inhabited by aborigines before the 17th century, when Dutch and Spanish colonies opened the island to mass Han immigration. After a brief rule by the Kingdom of Tungning, the island was annexed in 1683 by the Qing dynasty, the last dynasty of China. The Qing ceded Taiwan to Japan in 1895 after the Sino-Japanese War. While Taiwan was under Japanese rule, the Republic of China (ROC) was established on the mainland in 1912 after the fall of the Qing dynasty. Following the Japanese surrender to the Allies in 1945, the ROC took control of Taiwan. However, the resumption of the Chinese Civil War led to the ROC's loss of the mainland to the Communists, and the flight of the ROC government to Taiwan in 1949. Although the ROC continued to claim to be the legitimate government of China, its effective jurisdiction had, since the loss of Hainan in 1950, been limited to Taiwan and several small islands, with the main island making up 99% of its "de facto" territory. As a founding member of the United Nations, the ROC represented China at the UN until 1971, when it lost its seat to the PRC.