The blocking of another nation's attempts to spread its influence especially the efforts of the U.S. to block the spread of Soviet influence during the late 1940's and early 1950's.

• Isolationism
• Interventionism
• Containment
• Detente

A conflict between two opposing powers where they do not directly engage in combat, but instead support opposing sides in a different country.

• Guerrilla warfare
• Proxy war
• Civil war
• Cold war

A competition between the United States and the Soviet Union to achieve advancements in space exploration and technology.

• Apollo Program
• Space Race
• Moon Landing
• Sputnik Launch

A concrete wall that separated East Berlin and West Berlin from 1961 to 1989, built by the Communist East German government to prevent its citizens from fleeing to the West.

• Berlin Barrier
• Iron Curtain
• Berlin Wall
• East-West Divide

A period of improved relations and reduced tensions between the United States and the Soviet Union during the late 1960s and 1970s.

• Cold War
• Iron Curtain
• Nuclear Standoff
• Détente

A military alliance formed in 1955 by the Soviet Union and its Eastern European satellites

• Warsaw Pact
• SEATO
• NATO
• CENTO

The belief that if one country in a region falls to communism, other neighboring countries would also become communist.

• Red Scare Doctrine
• Domino Theory
• Contagion Hypothesis
• Chain Reaction Theory

A 13 day confrontation between the U.S., and Soviet Union over the placement of nuclear weapons aimed at the U.S. by the Soviets in Cuba.

• Cuban Missile Crisis
• Cold War
• Vietnam War
• Bay of Pigs Invasion

A conflict between North Korea and South Korea, lasting from 1950 to 1953, in which the U.S., along with other UN countries, caught on the side of the South Koreans and China fought on the side of the North Koreans

• World War II
• Korean War
• Cold War
• Vietnam War

The attacks, often unsubstantiated by Senator Joseph McCarthy and others on people suspected of being Communists i the early 1950s.

• Red Scare
• Cold War
• Loyalty Program
• McCarthyism