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The Korean War (25 June 1950 – armistice signed 27 July 1953) was a conventional war between South Korea, supported by the United Nations, and North Korea, supported by the People's Republic of China (PRC), with military material aid from the Soviet Union. The war was a result of the physical 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 Japan from 1910 until the end of World War II. Following the surrender of Japan in 1945, American administrators divided the peninsula along the 38th Parallel, with United States troops occupying the southern part and Soviet troops occupying the northern part.

The failure to hold free elections throughout the Korean Peninsula in 1948 deepened the division between the two sides, and the North established a Communist government. The 38th Parallel increasingly became a political border between the two Koreas. Although reunification negotiations continued in the months preceding the war, tension intensified. Cross-border skirmishes and raids at the 38th Parallel persisted. The situation escalated into open warfare when North Korean forces invaded South Korea on 25 June 1950. It was the first significant armed conflict of the Cold War.

The United Nations, particularly the United States, came to the aid of South Korea in repelling the invasion, but within two months the defenders were pushed back to the Pusan perimeter, a small area in the south of the country, before the North Koreans were stopped. A rapid UN counter-offensive then drove the North Koreans past the 38th Parallel and almost to the Yalu River, and the People's Republic of China (PRC) entered the war on the side of the North.[11] The Chinese launched a counter-offensive that pushed the United Nations forces back across the 38th Parallel. The Soviet Union materially aided the North Korean and Chinese armies. In 1953, the war ceased with an armistice that restored the border between the Koreas near the 38th Parallel and created the Korean Demilitarized Zone (DMZ), a 2.5-mile (4.0 km) wide buffer zone between the two Koreas. Minor outbreaks of fighting continue to the present day.

With both North and South Korea sponsored by external powers, the Korean War was a proxy war. From a military science perspective, it combined strategies and tactics of World War I and World War II: it began with a mobile campaign of swift infantry attacks followed by air bombing raids, but became a static trench war by July 1951.


  • Republic of Korea
  • United Nations (UN Resolution 84)

Combat support

  • Australia
  • Belgium
  • Canada
  • Colombia
  • Ethiopian Empire
  • France
  • Kingdom of Greece
  • Luxembourg
  • Netherlands
  • New Zealand
  • Philippines
  • Union of South Africa
  • Thailand
  • Turkey
  • United Kingdom
  • United States

Medical support

  • Denmark
  • India
  • Italy
  • Norway
  • Sweden

Supplies support

  • Argentina
  • Allied-occupied Austria
  • Bolivia
  • Brazil
  • Union of Burma
  • Protectorate of Cambodia
  • Chile
  • Republic of China
  • Costa Rica
  • Cuba
  • Dominican Republic
  • Ecuador
  • El Salvador
  • Kingdom of Egypt
  • Federal Republic of Germany
  • Guatemala
  • Haiti
  • Honduras
  • People's Republic of Hungary
  • Iceland
  • Indonesia
  • Imperial State of Iran
  • Israel
  • Jamaica
  • Occupied Japan
  • Lebanon
  • Liberia
  • Mexico
  • Monaco
  • Nicaragua
  • Dominion of Pakistan
  • Panama Paraguay
  • Peru
  • Saudi Arabia
  • Switzerland
  • Republic of Syria
  • Uruguay
  • Venezuela
  • State of Vietnam

Postwar support

  • Kingdom of Iraq
  • Ireland
  • Liechtenstein
  • Portugal
  • Spanish State
  • Vatican City
  • Democratic People's Republic of Korea
  • People's Republic of China
  • Union of Soviet Socialist Republics

Medical support

  • People's Republic of Bulgaria
  • Czechoslovak Socialist Republic
  • People's Republic of Poland
  • Romanian People's Republic

Commanders and leaders

  • Rhee Syngman
  • Shin Sung-mo
  • Lee Ki-boong
  • Shin Tae-young
  • Son Won-il
  • Douglas MacArthur
  • Matthew Ridgway
  • Mark Wayne Clark


  • Pak Hon-yong
  • Choi Yong-kun
  • Kim Chaek
  • Mao Zedong
  • Peng Dehuai
  • Joseph Stalin



1950-53 - Korean Conflict.