| Term | Definition |
| Isolationism | having little to do with the political affairs of other nations |
| Expansionism | extending it's nations boundaries |
| Imperialism | the policy of powerful countries seeking to control politcal affairs of weaker countries and regions |
| Sphere of Influence | an area, usually around seaport, where a nation had special trading privileges |
| Washington Farewell Address | steer clear of permanet alliances |
| Open Door Policy | any nation could trade in the spheres of influence |
| Sewards Folly | name the people called the purchase of Alaska |
| Matthew Perry | sent Japan to open trade with them |
| Alfred Thayer Mahan | captain of U.S. Navy who believed in foreign trade |
| Queen Liliuokalani | queen of Hawaii against U.S. |
| Annexation of Hawaii | U.S. overthrew Queen Liliuokalani and got Hawaii |
| Boxer Rebellion | Chinese people who didn't like foreign people captured and killed many of them in China |
| Purchase of Alaska | often thought of as a mistake ended up great |
| The White Man's Burden | to speread their religion and culture to people whom they considered to be less civilized |
| Yellow Journalism | sensational stories that were often biased or untrue |
| "Remeber the Maine" | what Americans chanted after the destruction of the Maine |
| Spanish American War | an 1898 conflict between the United States and Spain, in which the United States supported Cubans' fight for indepedence |
| George Dewey | a United States naval officer remembered for his victory at Manila Bay in the Spanish-American War |
| Emilio Aguinaldo | Philipino who was lead both the Phillipine revolution against Spain and then the United States |
| Rough Riders | Nickname of the 1st U.S. Volunteer Cavalry Regiment during the Spanish-American War |
| Theodore Roosevelt | 26th president, known for: conservationism, trust-busting, Hepburn Act, safe food regulations, "Square Deal," Panama Canal, Great White Fleet, Nobel Peace Prize for negotiation of peace in Russo-Japanese War |