Final answer:
The timeline lists significant events during the early years of the Cold War that increased tensions between the United States and the Soviet Union.
Step-by-step explanation:
Timeline of Significant Events during Early Years of Cold War:
- March 1947: President Truman issues Truman Doctrine
- June 1948: The Soviet Union blockades Berlin
- August 1949: The Soviet Union tests its first atomic bomb
- June 1950: U.S. forces enter the Korean War
- November 1952: The United States tests the first hydrogen bomb
These events increased tensions between the United States and the Soviet Union during the early years of the Cold War. They represented key moments in the arms race and geopolitical rivalries between the two superpowers.
Learn more about Early years of the Cold War