| A | B |
| Imperialism | The policy of extending the rule of a more powerful nation over smaller or weaker nations |
| Monroe Doctrine | Policy stated by President Monroe in 1823 stating that there should be no further European colonization in the Western Hemisphere |
| Annex | To add, to incorporate territory into the control of a country |
| Open Door Policy | Policy advocated by the US which stated that all nations should have equal trading opportunities with China |
| Big Stick Policy | Slogan name given to the Roosevelt Corollary |
| Manifest Destiny | The belief that the United States was meant to extend from East coast to West coast |
| Roosevelt Corollary | Roosevelt's addition to the Monroe Doctrine stating that the United States would use diplomacy as possible but would be militarily prepared to defend the Doctrine and the Western Hemisphere |
| Isolationism | The policy of remaining uninvolved in other nations' affairs |
| Sphere of Influence | An area where one nation has dominance (ie: an area where only one nation is allowed to trade with the home nation) |
| Rough Riders | A group of volunteer cavalry led by Colonel Theodore Roosevelt during the Spanish American War |
| Platt Amendment | A 1903 treaty between the US and Cuba which aimed at protecting Cuba's independence with the help of US intervention on their behalf in international affairs |
| Foraker Act | Established a government system in Puerto Rico in 1900 after it became a protectorate of the US |
| Dollar Diplomacy | The term used to describe the US efforts to further power and control in Latin America and Asia by using economic strength to guarantee loans |
| Ethnocentrism | Belief in the superiority of your own culture over others |
| Yellow Journalism | Journalism that relies on sensationalism and exaggeration to attract readers |
| Communism | An economic system based on government ownership and shared use of all resources |
| Modernization | To make new or updated (ie: new technology) |
| Westernization | Influence with ideas, customs, and practices of the West (particularly the US) |