Syngman Rhee was a South Korean politician who served as the first president of South Korea from 1948 to 1960. Rhee is also known by his art name Unam. Rhee was also the first and last president of the Provisional Government of the Republic of Korea from 1919 to his impeachment in 1925 and from 1947 to 1948. As president of South Korea, Rhee's government was characterised by authoritarianism, limited economic development, and in the late 1950s growing political instability and public opposition.

The First Republic of Korea was the government of South Korea from August 1948 to April 1960. The first republic was founded on 15 August 1948 after the transfer from the United States Army Military Government that governed South Korea since the end of Japanese rule in 1945, becoming the first independent republican government in Korea. Syngman Rhee became the first president of South Korea following the May 1948 general election, and the National Assembly in Seoul promulgated South Korea's first constitution in July, establishing a presidential system of government.