| Term | Definition |
| Eastern Europe | Taken over by U.S.S.R. in the name of liberation. Truman vowed it would not happen to other developing nations |
| NATO | Formed as security for all western nations against communist takeover. |
| Chinese civil war | War between communist Mao Zse Tong and nationalist Chaing-Kai Shek. The communists took over and forced the nationalists to retreat to Taiwan |
| Greece and Turkey | Two countries that were seavd from communist takeover through U.S. intervention. |
| Yugoslavia and Albania | Two countries that were taken by the communists, but refused to join with the U.S.S.R. |
| Berlin Airlift | An international crisis involving West Berlin. |
| Euro communist party | Party formed by the U.S.S.R. to cause a fall of western Europe. Most predominant in Italy and Spain. |
| Korean War | Ended in stalemate. |
| Vietnam War | American intervention ended in cease-fire. |
| Joe McCarthy | Leader of red scare and unlimited accusations that lasted from 1950 to 1954. |
| Cuban Missile crisis | Ended in withdrawl of Soviet misiles from Cuba. |