Republic of Formosa
The Republic of Formosa (), was a short-lived republic that existed on the island of Taiwan in 1895 between the formal cession of Taiwan by the Qing Dynasty of China to the Empire of Japan by the Treaty of Shimonoseki and it being taken over by Japanese troops. The Republic was proclaimed on 23 May 1895 and extinguished on 21 October, when the Republican capital Tainan was taken over by the Japanese. Though sometimes claimed as the first Asian republic to have been proclaimed, it was predated by the Lanfang Republic in Borneo, established in 1777, as well as by the Republic of Ezo in Japan, established in 1869.
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.