| Term | Definition |
| Isolationism | policy of having little to do with the political affairs of foreign nations |
| Washington's Farewell Address | Steer clear of permanent alliances |
| Expansionism | policy of extending a nation's boundaries |
| Commodore Matthew Perry | was sent by President Millard Fillmore to Japan where he successfully opened trading relations |
| Imperialism | policy of powerful countries seeking to control the economic and political affairs of weaker countries or regions |
| Open Door Policy | policy toward China that allowed a nation to trade in any other nation's sphere of influence |
| Sphere of Influence | area in which a foreign nation had special trading privleges and made laws for its own citizens |
| Sewards Folly | What many Americans called Alaska after the purchase of it because they thought of it as a land of icy mountains and frozen fish |
| Alfred Thayer Mahan | captain of US Navy who believed in foreign trade |
| Queen Liliuokalani | Took over Hawaii after the passing of her brother and was against the American presence in Alaska |
| Annexation of Hawaii | US overthrew Queen Liliuokalani in order to make Hawaii there own for its great location and farming conditions |
| Boxer Rebellion | Chinese people who were opposed to the foreign influence in China tried to rid of "foreign devils" by capturing and killing many |
| Purchase of Alaska | the US bought Alaska from the Russians because the Russians wanted to rid of it and the US wanted it for its location |
| White Man's Burden | to spread their religion and culture to people in countries that they annexed |
| Yellow Journalism | sensational stories that were often biased of untrue |
| "Remember the Maine" | Americans chanted asking for war against the Cubans |
| Spanish American War | A war between the Spain and and the US siding with the Philippines and Cubans |
| Commodore George Dewey | a commodore during the Spanish-American War who captured the Philippines and Guam |
| Emilio Aguinaldo | Filipino who lead both the Philippine revolution against Spain and then the United States |
| Rough Riders | volunteer soldiers led by Theodore Roosevelt during the Spanish American War |
| Theodore Roosevelt | Rough Rider, fighter in the Spanish American War, and 26th President of the United States |
| Manifest Destiny | U.S. thought that they needed to spread across America |
| Internationalism | intervening in other countries' affairs to promote important national intersts and/or to safeguard national security |
| Collective Security | a system in which a group of nations acts as one to preserve the peace of all |
| Empire | A number of regions ruled by a single authority |
| Rudyard Kipling | Came up with the white man's burden |
| William Randolph Hearst/Joseph Pulitzer | Owners of multiple newspapers, one of starters of yellow journalism |
| Philippine Insurrection | War started between U.S. and Philippines after the U.S. annexed the Philippines and overthrew Spain |
| Building of the Panama Canal | The Panama Canal was constructed by the US to allow ships to reach the Pacific from the Atlantic |
| Mexican American War | War between Mexicans and Americans over the annexation of Texas |