Kim Jong-un also romanised as Kim Jong-eun or Kim Jung-eun, (born 8 January 1983 or 1984), is the current supreme leader of North Korea. He has held the titles of the First Secretary of the Workers' Party of Korea, the Chairman of the Central Military Commission, First Chairman of the National Defence Commission of North Korea, the Supreme Commander of the Korean People's Army, and also a presidium member of the Central Politburo of the Workers' Party of Korea. He was officially declared the supreme leader following the state funeral for his father, Kim Jong-il on 28 December 2011. He is the third and youngest son of his deceased predecessor Kim Jong-il and his consort Ko Young-hee. From late 2010, Kim Jong-un was viewed as heir apparent to the leadership of the nation, and following his father's death, he was announced as the "Great Successor" by North Korean state television. At Kim Jong-il's memorial service, North Korean Chairman of Congress Kim Yong-nam declared that "Respected Comrade Kim Jong-un is our party, military and country’s supreme leader who inherits great comrade Kim Jong-il’s ideology, leadership, character, virtues, grit and courage". On 30 December 2011 the Politburo of the Workers' Party of Korea formally appointed Kim as the Supreme Commander of the Korean People's Army. On 11 April 2012, the 4th Party Conference elected him to the newly-created post of First Secretary of the Workers' Party of Korea.

The Korean War (Korean: 한국전쟁 or 조선전쟁, Hanja: 韓國戰爭 or 朝鮮戰爭; 25 June 1950 – 27 July 1953) was a war between the Republic of Korea (supported primarily by the United States of America, with contributions from allied nations under the aegis of the United Nations) and the Democratic People's Republic of Korea (supported by the People's Republic of China, with military and material aid from the Union of Soviet Socialist Republics). The Korean War was primarily the result of the political division of Korea by an agreement of the victorious Allies at the conclusion of the Pacific War at the end of World War II. The Korean Peninsula was ruled by the Empire of Japan from 1910 until the end of World War II. Following the surrender of the Empire of Japan in September 1945, American administrators divided the peninsula along the 38th parallel, with U.S. military forces occupying the southern half and Soviet military forces occupying the northern half.