| A | B |
| Theodore Roosevelt | President from 1901-1909 |
| Square Deal | President Roosevelt's program of progressive reforms |
| Upton Sinclair | Novelist who exposed social problems |
| The Jungle | Novel by Upton Sinclair describing meatpacking |
| Meat Inspection Act | Law reforming meatpacking conditions, 1906 |
| Pure Food and Drug Act | Law to stop the sale of unclean food and drugs, 1906 |
| conservation | The planned management of natural resources |
| NAACP | National Association for the Advancement of Colored People, founded in 1909 to work for racial equality |
| Clayton Antitrust Act | Law that weakened monopolies and upheld the rights of unions and farm organizations |
| Federal Trade Commission (FTC) | A federal agency set up in 1914 to investigate businesses to help enforce the laws |
| Federal Reserve System | National banking system begun in 1913 |
| Carrie Chapman Catt | President of NAWSA, who led the campaign for woman suffrage during Wilson's administration |
| Nineteenth Amendment | Amendment to the Constitution giving women the right to vote |
| Jose Marti | Political activist who worked for Cuban independence |
| Valeriano Weyler | General sent from Spain to Cuba to restore order in 1896 |
| yellow journalism | Reporting in newspapers and magazines that exaggerates the news in order to make it more exciting |
| U.S.S. Maine | US warship that exploded in a Cuban harbor in 1898 |
| George Dewey | US naval commander who led the American attack on the Philippines |
| Rough Riders | Fighting unit led by Theodore Roosevelt in Cuba |
| San Juan Hill | Location of an important land victory in Cuba |
| Treaty of Paris | The treaty that ended the Spanish-American War |
| Foraker Act | Law which ended military rule in Puerto Rico |
| Platt Amendment | Provisions in the Cuban constitution that gave the US broad rights in that country |
| protectorate | A country that is partly controlled by another, stronger country |
| Emilio Aguinaldo | Filipino rebel leader |
| John Hay | US secretary of state |
| Open Door notes | Message sent by John Hay to other countries to protect US trading rights in China |
| Boxer Rebellion | Chinese rebellion against Western influence, 1900 |