| A | B |
|---|
| East Coast, early American cities | Original 13 Colonies |
| Territories added after the Revolution, beyond the Ohio River | NW Territory |
| Land gained from Spain, now called Florida | Adams-Onis Treaty |
| Nearly doubled the size of the USA, bought from France | Louisiana Purchase |
| Warning that Europe should stay away from America's Western Hemisphere | Monroe Doctrine |
| Land that broke away from Mexico and was annexed by the USA | Texas |
| Land gained by the USA for winning the War with Mexico, includes the West | Mexican Cession |
| Negotiations with England led to 49th Parallel agreement | Oregon Country |
| Annexed by US against Lilikoulani's will | Hawaii |
| US gained influence over after winning the Spanish American War | Cuba, Philippines, Guam, Puerto Rico |
| Addition to Monroe Doctrine--said US would use force against outsiders | Roosevelt Corallary |
| WWII strategy of separating Japanese-controlled islands from Japan | Island Hopping |
| Policy of stopping the spread of Communism | Containment |
| Idea that one country becoming communist would lead to its neighbors becoming communist | Domino Theory |
