U.S. History
- minutemen
- Missing children
- Missions (Religion)
- Missouri Compromise
- Modoc War 1872-1873
- Monitor and Merrimack
- Monroe Doctrine
- Moral Majority
- Motor Carrier Act
- mountain men
- mugwumps
- Myths
- National Grange (Washington D.C.)
- National Recovery Administration
- National Road
- National Youth Administration
- Neoconservatism
- Neutrality Act
- New Deal
- New England Confederation