| Term | Definition |
| Isolationism | not being involoved in the political affairs of other countries |
| Washington's Farewell Address | he urged us to use isolationism inorder to not be involved in Europe's frequent wars |
| Seward's Folly | what some people called the purchase of Alaska |
| Expansionism | extending national boundaries |
| Imperialism | power of foriegn countries to seek control of smaller countries |
| Open Door Policy | created by John Hay to end the power of the spheres of influence |
| White Man's Burden | to spread religion and culture to less civilized nations |
| Spheres of Influence | port areas in which countries have some political and economic control but do not govern directly (ex. Europe and U.S. in China) |
| Yellow Journalism | journalism that exploits, distorts, or exaggerates the news to create sensations and attract readers |
| USS Maine | ship that explodes off the coast of Cuba in Havana harbor and helps contribute to the start of the Spanish-American War |
| Queen Liliuokalani | the Hawaiian queen who was forced out of power by a revolution started by American business interests |
| Mathew Perry | sent by president Millard Fillmore to persuade Japan to open its doors to trade with the west |
| George Dewey | a commodore during the Spanish-American War who captured the Philippines and Guam |
| Alfred Thayer Mahan | US naval captain that wanted the posperity of the US depended on foriegn trade and he wanted a larger Navy |
| Rough Riders | first group of volunteer soldiers led by Theodore Roosevelt during the Spanish-American War |
| Theodore Roosevelt | 26th President of the United States that was a Spanish-American War hero |
| Emilio Aguinaldo | Filipino who was lead both the Phillipine revolution against Spain and then the United States |
| Roosevelt Corollary | Roosevelt's 1904 extension of the Monroe Doctrine, stating that the United States has the right to protect its economic interests in South And Central America by using military force |
| Mexican American War | after Mexican refusal to sell California-New Mexico region, Polk sent troops and it ended w/ Treat of Guadalupe-Hidalgo |
| Spanish American War | an 1898 confllict between the United States and Spain, in which the United States supported Cubans' fight for indepedence |
| Boxer Rebellion | A 1900 Uprising in China aimed at ending foreign influence in the country. |