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Korean War

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The Korean War was an armed conflict on the Korean Peninsula. It lasted from June 25, 1950, to July 27, 1953. This war was a major proxy war during the Cold War. A proxy war happens when larger powers support opposing sides in a smaller conflict. North Korea was supported by China and the Soviet Union. South Korea was supported by the United Nations (UN) Command. The United States led this international force.

Korean Peninsula at night from space
Korean Peninsula at night from space

To understand the war, we must look at the history of Korea. From 1910 to 1945, Korea was a colony of the Empire of Japan. After World War II ended in 1945, the country was divided. Two occupation zones were created at the 38th parallel. The Soviet Union controlled the north, and the United States controlled the south. This line was chosen by U.S. officials to include the capital, Seoul, in the American zone.

South Korean refugees mid-1950
South Korean refugees mid-1950

Political disagreements prevented a single, unified government from forming. In 1948, two separate states were established. The Democratic People's Republic of Korea (North Korea) was led by Kim Il Sung. The Republic of Korea (South Korea) was led by Syngman Rhee. Both leaders claimed to be the only legitimate government for all of Korea. Tensions grew along the border for two years before the fighting began.

Truman initiating Korean involvement GettyImages-615308236
Truman initiating Korean involvement GettyImages-615308236

On June 25, 1950, the Korean People's Army (KPA) invaded the south. The KPA was trained and equipped by the Soviet Union. The UN Security Council authorized military force to help South Korea. This was the first time the UN used such power under its Charter. The United States provided about 90% of the military personnel. In total, 21 different countries sent forces to support the South.

KumRiver Howitzer
KumRiver Howitzer

The war moved through several intense stages. First, North Korean troops captured Seoul on June 28, 1950. By August, South Korean and UN forces were pushed back to the Pusan Perimeter. On September 15, UN forces landed at Inchon to cut off enemy supply lines. They recaptured Seoul and moved into North Korea by October. However, the Chinese People's Volunteer Army crossed the Yalu River to join the war. This caused UN forces to retreat in December 1950.

China Crosses Yalu
China Crosses Yalu

After the Chinese intervention, the war became a struggle of attrition. This means both sides fought to wear down the other's strength. UN forces retook territory near the 38th parallel after several offensives. Armistice negotiations began in July 1951, but fighting continued for two more years. During this time, the UN Command conducted heavy carpet bombing in the north. This bombing destroyed virtually all major cities in North Korea.

Korean War bombing Wonsan
Korean War bombing Wonsan

The human cost of the war was extremely high. Approximately 1 million military personnel died during the conflict. Even more people lost their lives as noncombatants. It is estimated that between 1.5 and 3 million Korean civilians were killed. Various sides were accused of war crimes during the fighting. On July 27, 1953, the Korean Armistice Agreement was signed. This agreement ended the combat but did not create a permanent peace.

Korean War armistice agreement 1953
Korean War armistice agreement 1953

The war left a lasting impact on the geography of the peninsula. The armistice created a 4-kilometer wide Demilitarized Zone (DMZ). This zone sits along the frontline to separate the two sides. It includes a Joint Security Area at Panmunjom. Because no peace treaty was ever signed, the conflict is called a "frozen conflict." This means the situation remains tense and could flare up again.

South Africa-Korean War Memorial01
South Africa-Korean War Memorial01
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🖼️ Images & Media (29)
File:Korean war 1950-1953.gif
Korean war 1950-1953.gif
File:South Korean refugees mid-1950.jpg
South Korean refugees mid-1950.jpg
File:Truman initiating Korean involvement GettyImages-615308236.jpg
Truman initiating Korean involvement...
File:KumRiver Howitzer.jpg
KumRiver Howitzer.jpg
File:KoreanWarFallenSoldier1.jpg
KoreanWarFallenSoldier1.jpg
File:HA-SC-98-06983-Crew of M24 along Naktong River front-Korean war-17 Aug 1950.JPEG
HA-SC-98-06983-Crew of M24 along Naktong...
A U.S. Marine tank follows a line of...
File:Korean War, train attack.jpg
Korean War, train attack.jpg
File:China Crosses Yalu.jpg
China Crosses Yalu.jpg
File:U.S. Army machine gun team near the Chongchon River in North Korea (November 1950).jpg
U.S. Army machine gun team near the...
File:Korean War bombing Wonsan.jpg
Korean War bombing Wonsan.jpg
File:U.S. Marines in the Korean War 003.jpg
U.S. Marines in the Korean War 003.jpg

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