The Korean War began in June 1950 when communist North Korea invaded U.S.-backed South Korea.
The U.S. believed the Soviet Union engineered the invasion and took swift countermeasures.
The U.S. adhered to its policy of containment, aiming to prevent the spread of communism in Asia.
The Korean War became the first proxy war of the Cold War.
In October 1950, Chinese troops (Chinese People’s Volunteer Army - CPV) assisted North Korea.
Communist forces pushed American and South Korean troops back to the 38th Parallel, the original border.
U.S. commander Douglas MacArthur advocated for an all-out confrontation with China to overthrow the Communists.
Contextualization: U.S. Policy in Asia at the Beginning of the Cold War
Three main issues dominated U.S. policy in Asia:
Reconstruction of Japan:
After WWII, the U.S. occupied Japan, and its colonies were divided.
The U.S. controlled Pacific Islands and the southern half of Korea, while the USSR controlled the northern half of Korea.
Under General Douglas MacArthur, Japan adopted a democratic constitution, demilitarized, and experienced economic revival.
The Chinese Revolution:
The U.S. supported Chiang Kai-shek’s Nationalist government against Mao Zedong’s Communist insurgents during China’s civil war.
Mao took control of China in 1949, and the Nationalists were exiled to Taiwan.
Many Americans blamed Truman and the Democrats for the "fall" of China, believing it shifted the Cold War balance toward communism.
The U.S. and other United Nations powers continued to recognize Chiang as the rightful leader of China, despite his exile.
For decades, the U.S. refused to recognize the legitimacy of Mao’s regime.
President Harry Truman’s Statement on the Situation in Korea, June 1950
Truman compared the North Korean invasion to past aggressions by Japan, Italy, and Germany.
He stated that if the Communists were allowed to invade the Republic of Korea without opposition, it would embolden communist neighbors to threaten and commit acts of aggression against small nations.
The United Nations Security Council denounced the North Korean move and authorized the formation of the United Nations Command.
The UN dispatched forces to Korea to repel the invasion.
Twenty-one countries contributed to the UN force, with the United States providing approximately 90% of the military personnel.
Truman aimed for the reunification of Korea after initial military successes.
American troops attacked North Korea under the United Nations umbrella, provoking China.
Limited vs Total War
Truman's administration and the U.N. opted for a "limited war" to avoid conflict with China.
They feared broader conflict if China was attacked and worried about potential USSR reactions in Europe or Asia.
Truman announced that nuclear weapons would not be used.
The UN forces aimed to restore the original border and establish a peaceful resolution.
General MacArthur Presents his Views to Congress (April 10, 1951)
MacArthur advocated for applying every available means to achieve a swift end to the war.
He believed military necessity required:
Increasing economic blockade against China.
A naval blockade against the Chinese coast.
Removing restrictions on air attack on China.
Removing restrictions on forces against the Chinese mainland.
President Truman Explains the Need for Limited War (April 11, 1951)
Truman sought to prevent a world war and avoid a full-scale conflict with Communist China.
He argued that using atomic bombs on Manchuria and China would carry a grave risk of escalating the conflict and benefiting the Soviet Union.
When MacArthur started publicly criticizing President Truman, Truman fired him for insubordination.
Armistice and Aftermath
*armistice = an agreement made by opposing sides in a war to stop fighting for a certain time; a truce.
Dwight Eisenhower won the 1952 election promising to visit Korea and negotiate a ceasefire.
Eisenhower threatened to use atomic weapons, leading to a ceasefire signed on July 27, 1953.
A Military Demarcation Line was established, and both sides withdrew two kilometers to create a Demilitarized Zone (DMZ).
The DMZ served as a buffer zone to prevent hostilities.
The border remained at the 38th parallel, the pre-war dividing line.
The DMZ is a 2.5 mile wide by 155 mile long territory on the 38th parallel, with continued tension and occasional conflicts.
The American public viewed the war as ineffective and costly.
The war resulted in catastrophic human costs, including extensive bombing.
Curtis LeMay described the devastation, including the burning of towns in both North and South Korea with Napalm bombs.
*napalm = a firebomb gel mixture that clings to whatever it touches, creating a hotly burning area around the target.