Places
- Marion County (W. Va.)1
- Maryland 1
- Massachusetts - History - Civil War, 1861-1865 - Participation, African American.1
- Mineral County (W. Va.)1
- Monongahela River Valley (W. Va. and Pa.)1
- Monongalia County (W. Va.)1
- Morgantown (W. Va.)1
- Morris Island (S.C.)1
- Morris Island (S.C.) -- History -- Civil War, 1861-18651