U.S. History
- American Labor Party
- American Party
- American Railway Union
- American Revolution
- American War of Independence
- America’s Cup
- Ames Espionage Case
- Annapolis Convention
- Anthropology and Ethnology
- Anti-Federalists
- Anti-Saloon League
- Antietam campaign
- Antitrust Legislation
- Arab Americans
- Aroostook War
- Articles of Confederation
- Assistant
- Atlanta campaign
- Backlash
- Balloons