Since 1947 to 1953, there has been no greater threat in the world's history than the Cold War. This intensified largely due to a variety of reasons, these include, for example, the Truman Doctrine, the Marshall Plan, the Berlin Blockade, the formation of NATO and lastly the Korean War. These events, each contribute an important role which has exaggerated the Cold War and became a significant part of the world's history today.

Turning firstly to the Truman Doctrine, several aspects relate to the intensification of the Cold War between 1947 and 1953. Firstly, it was due to Turkey and Greece who were under a great threat by the Soviet-supported rebels seeking to overthrow the government and rule via communist power. This made the US and its president, Harry Truman very nervous. He gave a speech to the congress concerning small countries falling to the pressure of communism. "I believe that it must...