Harry S. Truman became the 33rd President of the United States upon the death of Franklin Roosevelt on April 1945. As President he believed that he must take a stance against the Soviet Union. On 12 March 1947, President Truman spoke to Congress. His speech is very famous. What he said became known later as the ‘Truman Doctrine’. Truman’s Speech was an event of immense importance in the Cold War, and it set out many of the principles by which the USA was to fight the Cold War for the next 30 years. Truman supplied Greece and Turkey with money, weapons and aid against the Soviet Union.
On June 25, 1950, the Korean War began when 75,000 soldiers from the North Korean People’s Army poured over