| A | B |
| Eastern Europe | Taken over by Communist governments in the late 1940s |
| Iron Curtain | An imaginary line that divided Communist Eastern Europe from non-communist Western Europe |
| Berlin Airlift | Truman's answer to Stalin blockading Berlin |
| containment | US strategy of stoping the expansion of Communism |
| Marshall Plan | Economic aid given to western Europe in order to prevent those countries from turning to Communism |
| USSR | Exploded an A_Bomb in 1949 |
| China | Became Communist in 1949 |
| Cold War | Ideological conflict between the Communist USSR and capitalist USA from 1945 to 1989 |