Teaching With Documents
War broke out along the 38th parallel on June 25, 1950. On that day, North Korean troops coordinated an attack at several strategic points along the parallel and headed south toward Seoul. The United Nations Security Council responded to the attack by adopting (by a 9-0 vote) a resolution that condemned the invasion as a "breach of the peace." The Council did not have a Soviet delegate, since 6 months prior, the Soviet Union had left to protest the United Nation's refusal to seat a delegate from China. President Harry S. Truman quickly committed American forces to a combined United Nations military effort and named Gen. Douglas MacArthur Commander of the U.N. forces. Fifteen other nations also sent troops under the U.N. command. Truman did not seek a formal declaration of war from Congress; officially, America's presence in Korea amounted to no more than a "police action."
However, the entry of the United States into the conflict signaled a reversal of policy toward Korea. Although it backed the government of Syngman Rhee, the United States had begun withdrawing its troops from South Korea in 1948. As late as January of 1950, Secretary of State Dean Acheson had implied that the Korea Peninsula lay outside the all-important "defense perimeter" of the United States, a statement that some took to mean that the United States would not defend the ROK from communist attack.
So why did the United States become involved in the Korean conflict?
The decision to intervene in Korea grew out of the tense atmosphere that characterized Cold War politics. On the eve of the North Korean invasion, a number of events had made Truman anxious. The Soviet Union exploded an atomic bomb in 1949, ending the United States' monopoly on the weapon. In Europe, Soviet intervention in Greece and Turkey had given rise to the Truman Doctrine and the Marshall Plan, which funneled aid to war-torn Europe in the hopes of warding off communist political victories. In early 1950, President Truman directed the National Security Council (NSC) to conduct an analysis of Soviet and American military capabilities. In its report, known as "NSC 68," the Council recommended heavy increases in military funding to help contain the Soviets.
Events in Asia also contributed to an increased sense of insecurity. In 1949 China underwent a revolution that brought Mao Zedong and his Communist party into power. The nationalists, led by Chiang Kai-Shek, had retreated to the island of Formosa (Taiwan) while they continued their war with mainland China. Mao quickly moved to ally himself with the Soviet Union, and signed a treaty with the Soviets in 1950. The Truman administration faced criticism from Republicans who claimed he had "lost" China. They criticized him for not providing enough aid to the Chinese nationalists. The suggestion by Secretary of State Dean Acheson that the administration recognize the communist government of China only gave them more ammunition for their attacks.
The Truman administration also faced internal criticism regarding its commitment to anticommunism at home. Republican Senator Joseph McCarthy of Wisconsin had recently begun his infamous hunt for communists within the U. S. Government. Although McCarthy was just warming up, the recent trials of Alger Hiss and others for espionage left the Truman administration apprehensive about its anticommunist credentials. Truman and his advisors found themselves under increased domestic pressure not to appear "soft" on communism abroad.
Thus, when North Korean troops invaded the South, the Truman administration seized upon the opportunity to defend a noncommunist government from invasion by communist troops. Determined not to "lose" another country to communism, and interested in shoring up its anticommunist credentials, the Truman administration found itself defending a nation a world away from U.S. soil. Yet Truman's response was not merely a response to internal pressure. The invasion of South Korea made Truman genuinely fearful that the Soviet Union and China intended to expand the sphere of communism throughout Asia.
However, the entry of the United States into the conflict signaled a reversal of policy toward Korea. Although it backed the government of Syngman Rhee, the United States had begun withdrawing its troops from South Korea in 1948. As late as January of 1950, Secretary of State Dean Acheson had implied that the Korea Peninsula lay outside the all-important "defense perimeter" of the United States, a statement that some took to mean that the United States would not defend the ROK from communist attack.
So why did the United States become involved in the Korean conflict?
The decision to intervene in Korea grew out of the tense atmosphere that characterized Cold War politics. On the eve of the North Korean invasion, a number of events had made Truman anxious. The Soviet Union exploded an atomic bomb in 1949, ending the United States' monopoly on the weapon. In Europe, Soviet intervention in Greece and Turkey had given rise to the Truman Doctrine and the Marshall Plan, which funneled aid to war-torn Europe in the hopes of warding off communist political victories. In early 1950, President Truman directed the National Security Council (NSC) to conduct an analysis of Soviet and American military capabilities. In its report, known as "NSC 68," the Council recommended heavy increases in military funding to help contain the Soviets.
Events in Asia also contributed to an increased sense of insecurity. In 1949 China underwent a revolution that brought Mao Zedong and his Communist party into power. The nationalists, led by Chiang Kai-Shek, had retreated to the island of Formosa (Taiwan) while they continued their war with mainland China. Mao quickly moved to ally himself with the Soviet Union, and signed a treaty with the Soviets in 1950. The Truman administration faced criticism from Republicans who claimed he had "lost" China. They criticized him for not providing enough aid to the Chinese nationalists. The suggestion by Secretary of State Dean Acheson that the administration recognize the communist government of China only gave them more ammunition for their attacks.
The Truman administration also faced internal criticism regarding its commitment to anticommunism at home. Republican Senator Joseph McCarthy of Wisconsin had recently begun his infamous hunt for communists within the U. S. Government. Although McCarthy was just warming up, the recent trials of Alger Hiss and others for espionage left the Truman administration apprehensive about its anticommunist credentials. Truman and his advisors found themselves under increased domestic pressure not to appear "soft" on communism abroad.
Thus, when North Korean troops invaded the South, the Truman administration seized upon the opportunity to defend a noncommunist government from invasion by communist troops. Determined not to "lose" another country to communism, and interested in shoring up its anticommunist credentials, the Truman administration found itself defending a nation a world away from U.S. soil. Yet Truman's response was not merely a response to internal pressure. The invasion of South Korea made Truman genuinely fearful that the Soviet Union and China intended to expand the sphere of communism throughout Asia.