History of South Korea
On August 15, 1948, the Republic of Korea was formally established, with Rhee Syngman as the first president. With the establishment of Rhee's government, de jure sovereignty also passed into the new government. On September 9, 1948, a communist regime, the Democratic People's Republic of Korea (North Korea), was proclaimed under Kim Il-sung. However, on December 12, 1948, by its resolution 195 in the Third General Assembly, the United Nations recognized the Republic of Korea as the sole legal government of Korea.
List of Presidents of South Korea
Three of the Governments proclaimed in 1919 continued to be active in the months after the March 1st Movement; the Governments proclaimed in Seoul, Shanghai and Vladivostok. After a period of negotiations, members of these three governments agreed to form the unified Provisional Government in Shanghai, with succession of the legitimacy of the Seoul Government and bringing the members of the Vladivostok legislature into the Shanghai legislature. The unified Provisional Government of the Republic of Korea was established on 11 September 1919 with a new constitution.