History of Korea
After the end of WWII in 1945, the Allies divided the country into a northern area (protected by the Soviets) and a southern area protected (primarily by the United States). In 1948, when the powers failed to agree on the formation of a single government, this partition became the modern states of North and South Korea. The peninsula was divided at the 38th Parallel: the "Republic of Korea" was created in the south, with the backing of the US and Western Europe, and the "Democratic People's Republic of Korea" in the north, with the backing of the Soviets and the communist People's Republic of China. The new premier of North Korea, Kim il-Sung, launched the Korean War in 1950 in an attempt to reunify the country under Communist rule. After immense material and human destruction, the conflict ended with a cease-fire in 1953. The two nations officially remain at war because a peace treaty was never signed. In 1991, both states were accepted into the United Nations.
North Korea–South Korea relations
North Korea–South Korea relations is very special with high conflicts. Originally a single nation, the two nations have been divided since the Korean War in 1953. North Korea is an one-party state run by Kim's regime. South Korea was formerly govern by one-party military dictatorships until 1987 when it held direct elections till now. Both nations claim to represent Korea. Both nations joined the United Nations in 1991 and recognized by most of the member states in the United Nations. Since 1970s, both nations start informal diplomatic dialogues in order to reduce military tensions. Since North Korea develops nuclear weapons, which raise concern by the international communities. In 2000, President of South Korea Kim Dae-jung became the first president to visit North Korea, after 55 years of North-South divisions in the peninsula.