| A | B |
| Roosevelt Corollary | addition to Monroe Doctrine stating U.S. intent to police Latin America |
| Platt Amendment | gave US the right to intervene in Cuban affairs |
| Rough Riders | First U.S. Volunteer Cavalry |
| Missionaries | Person sent on a religious mission |
| Boxer Rebellion | violent uprising by Chinese group against Western influences |
| Open Door Policy | U.S. asked nations involved in Asia to follow a policy in which no country controlled trade with China |
| Sphere of Influence | Foreign nations claim special rights and economic privileges |
| Corollary | A proposition that follows something that is already proved |
| Imperialism | Stronger nations take economic, political and military control of a weaker nation |
| Revolution | A forcible overthrow of a government system |
| Diplomacy | The skill of managing international relations |
| Yellow Journalism | a style of writing that exaggerates the news |
| Annexation | to append or add as an extra part to an existing country |
| Cultural Superiority | belief that one's gov't, religion and race are better than others |
| Anti-imperialist League | group of well known Americans who opposed US expansion |
| Isthmus | narrow strip of land with sea on either side |