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.
Day of the Foundation of the Republic (North Korea)
Following the Liberation of Korea in 1945 by the Soviet and American forces, a communist Soviet military regime was set up in the northern part of Korea. A new Supreme People's Assembly was elected in August 1948, and on 3 September a new constitution was promulgated. The Democratic People's Republic of Korea was proclaimed on 9 September, with Kim Il-sung as Premier. Because the date is 9 September, it is also called 9 · 9 (old version).