After the conclusion of the dangerous Second World War, America prepared for a period of peace. This peacetime was short-lived, as American tolerance of communism waned and this issue became America's primary concern. The United States of America, also called the USA or United States, considered communism a strategic threat because of its hostility to private property and free markets, policies that many Americans directly associate with political freedom. During the intense historical period identified as the Cold War, America's attention was, for the most part, politically and economically occupied with the threat of global expansion of the left and methods aimed at preventing such an event. McCarthyism, the Marshal Plan and the Truman Doctrine are some of the tactics employed by the United States as a defense tool. form of resistance against communism. The constant fear of communism intensified largely following the declaration of China's political status, the Korean War, and the Rosevelt case. Julius and Ethel Rosevelt were tried and convicted of treason to the state in the early 1940s. Author SM Harrison confirms that many historians believed that if America were defeated, it would not be by external enemies, but by internal enemies. The pair were executed for providing the Soviets with classified information about American nuclear power. The Soviet definition of possession of atomic energy further increased the United States' fear of the Communists. The war between capitalists and communists in Korea in 1950 and the communist revolution in China would lead to the initial American uprising towards... middle of paper... Melbourne§ unknown. (2004). "American McCarthyism" (online)http://www.spartacus.schoolnet.co.uk/USAmccarthyism.htm§ Schrecker, E.(2004).“McCarthyism”.(online)http://www.writing.upenn. edu/wafiries/ 50s/schrecker_age.html§ Hammer, J.(1980). “History in the making”.Macmillan Education:London§ Unknown.(2004). "Cold War". (online) http://en.wikipedia.org/wiki/mccarthyism § Painter, D. (1999). "The Cold War". Routledge:London§ Harrison, S.(1987). "Conflict in the 20th Century". MacmillanEducation:Hampshire§ Wilson, T.(2004). “Marshal Plan”. World book encyclopedia. World Book Inc: Chicago. Vol 13§ Ross, S. (2001). "Causes of the Cold War". Hodder's Children's Books: Great Britain§ Kaufman, B. (2004). "The policy of containment". World book encyclopedia. World Book Inc: Chicago. vol 4