Based on the telegrams and what you learned in the lesson, write one to two paragraphs in which you respond to this question: why did the cold war between the united states and the soviet union begin?

The Cold War started because of United States and Soviet Unions difference in view when it comes to Communism. US became more and more concerned with how the Soviet Union are showing their "expansive tendencies" when it comes to their dealings with Europe. The long telegram that was sent to the Department of State became the greatest foundation of the America's Cold War Policy of containment. 

The Soviet Unions aggressive speeches and actions against Iran and Turkey gave way to the Truman's administration to show a stronger stance instead of a diplomatic approach that the previous administrations were doing. These factors guaranteed acceptance of Kennan's analysis that was expressed on the telegram.

Answer is mass marketing.