| Term | Definition |
| Leon Czolgosz | anarchist that assassinated McKinley; electrocuted |
| William McKinley | Popular President; assasinated at the Pan-American Exhibition in Buffalo |
| 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 |
| Minor C. Keith | Banana Guy; ran a fruit company in Banana Republics of Central America |
| Sandford B. Dole | Pineapple Guy; business interests led to the annexation of Hawaii |
| Laissez Faire | Government to keep hands off of business |
| Paradox of Power | Contradiction of accepting American money but protesting American expansion |
| Imperialism | controlling a nation politically, militarily, and economically |
| Isolationists | believed in acquiring new markets but not new territory |
| Alfred Mahan | wanted to the United States to create a stronger Navy |
| Albert Beveridge | Senator that used racial superiority to justify expansion |
| Admiral Dewey | led the attack on the Spanish Ships in Manilla Bay 1898 |
| Jose Marti | writer expelled from Cuba |
| Valariano Weyler | Brutal Spanish in charge of |
| Yellow Journalism | Distorting the truth to sway opinion is a form of |
| Hearst and Pulitzer | Newspaper men who engaged in Yellow Jornalism |
| Dollar Diplomacy | Foreign Policy of providing money to other nations in exchange for U.S. influence |
| San Juan Hill | Most famous battle of the Spanish American War that made Teddy famous |
| Rough Riders | Group of volunteer cavalrymen let by Teddy Roosevelt |
| Social Darwism | Darwin's theory of "survival of the fittest" applied to business |
| William Garrison Hearst | "You provide the pictures; I'll provide the war." |
| Theodore Roosevelt | "I took the Isthmus" |