alleyway during Halloween festivities in Seoul's Itaewon district. President Yoon declared a state of official national mourning. See also Elections in South Korea History of Asia History of East Asia History of North Korea History of Korea List of presidents of South Korea Politics of South Korea Prehistoric Korea References Citations Sources Country studies: South Korea: The 1st Republic at Doosan Encyclopedia The 2nd Republic at Doosan Encyclopedia The 3rd Republic at Doosan Encyclopedia The 4th Republic at Doosan Encyclopedia The 5th Republic at Doosan Encyclopedia The 6th Republic at Doosan Encyclopedia 6.25 War at Doosan Encyclopedia External links Official site of Republic of Korea Korean History Research Organization Background notes: South Korea, U.S. Department of State Countries & their culture: South Korea History of Korea, Asian Info Organization The Korean War, BBC Korean War, Naval History & Heritage Command Hidden Korea, PBS Korea: case history of a pawn, The United States Army Center of Military History The Korea Society Podcast: History of Korea Part 1&2 Institute of Historical Studies Museum of Modern History of Korea pt:Coreia do Sul#História