| A | B |
|---|
| The Cold War | (1945-1991); the U.S. and USSR |
| The 9/11 terrorist attacks | led to the War on Terrorism |
| normalizing relations with China | Richard M. Nixon |
| The Camp David Accords | peace between Israel and Egypt |
| The Iranian Hostage Crisis | dozens of Americans were held hostage |
| The Cuban Missile Crisis | 1962; the Soviets tried to deliver nuclear weapons to Cuba |
| The Gulf of Tonkin Resolution | 1964; the president escalated operations in SE Asia |
| The Tet Offensive | 1968; when American opinion changed about the Vietnam War |
| Sputnik I | led to more technological innovations in the U.S. |
| containment | stopping the spread of communism |
| The Marshall Plan | providing aid for countries to recover from World War II |
| The Truman Doctrine | giving aid to nations fighting against communists |
| The Korean War | China and North Korea v. the U.S. and South Korea |
| The Lend-Lease Act | 1941; the U.S. sent supplies to the Allies during World War II |
| imperialism | the U.S. began expanding outside North America |
| The Roosevelt Corollary | 1904; the U.S. could intervene in Latin America |
| The League of Nations | created after World War I to prevent future conflicts |
| The Monroe Doctrine | 1823; Europeans should stay in their own hemisphere |
