Taiwan (Chinese: 台灣; pinyin: Táiwān, ⁱ/ˌtaɪˈwɑːn/ ty-wahn), also known, especially in the past, as Formosa (from Portuguese: Ilha Formosa, "Beautiful Island"), is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of "mainland China". The island forms over 99% of the de facto current territory of the Republic of China (ROC) following the Chinese Civil War in 1950. Due to this reason and the disputed political status of Republic of China in the United Nations, the name "Taiwan" has also become the pars pro toto common name for the country itself. (See also Names of the Republic of China.)