Korea After Imperialism By DeltaSwag Period: Aug 22, 1910 to Aug 15, 1945 Japanese Occupation Aug 9, 1945 Soviet tanks enter Northern Korea Sep 5, 1945 Division of country by Soviet Union and US Period: Aug 15, 1948 to Apr 26, 1960 First Republic of South Korea Dec 12, 1948 UN recognizes the Republic of Korea as government Jun 25, 1950 North Korea invades South Korea Jul 27, 1953 Korean Demilitarized Zone established Period: Jul 29, 1960 to May 16, 1961 The Second Republic of South Korea Period: Oct 15, 1963 to Oct 17, 1972 The Third Republic of South Korea Period: Nov 21, 1972 to Oct 26, 1979 The Fourth Republic of South Korea Period: Dec 12, 1979 to Jun 29, 1987 The Fifth Republic of South Korea Period: Dec 16, 1987 to Jan 1, 2013 The Sixth Republic of South Korea Jul 8, 1994 Kim Il-sung dies Feb 10, 2005 N. Korea claims it has nuclear weapons Dec 17, 2011 Kim Jong-il dies