Causes of the Cold War in 1945

* American fear of communist attack

* Truman’s dislike of Stalin

* USSR’s fear of the American’s atomic bomb 

* USSR’s dislike of capitalism

* USSR’s actions in the Soviet zone of Germany

* America’s refusal to share nuclear secrets

* USSR’s expansion west into Eastern Europe + broken election promises

* USSR’s fear of American attack

* USSR’s need for a secure western border

* USSR’s aim of spreading world communism

This feeling of suspicion lead to mutual distrust and this did a great deal to deepen the Cold War.