The document provides background on the origins and early history of the Cold War between the United States and Soviet Union from 1945-1960. It discusses the emergence of the two superpowers after World War 2 and the ideological differences that fueled tensions. Key events that escalated the conflict included the Soviet domination of Eastern Europe, the communist revolution in China, and Soviet spying in the US. The arms race and use of covert operations by the CIA to undermine governments unfriendly to the US also increased Cold War hostilities.