U.S. History
- Mail-Order House
- Majority Rule
- manifest destiny
- Mann-Elkins Act
- Maple Sugar
- Marksmanship
- Marriage and Family
- Massachusetts Bay Company
- Mayflower Compact
- McCarthyism
- McCormick Reaper
- Medical education
- Meetinghouse
- Melting Pot
- Mexican Americans
- Mexican War
- Mexican-American War
- Middle Passage
- Military Exploration
- Military photography