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Subject
- United States--History--Civil War, 1861-1865[remove]1,204
- Historic sites748
- Fort Sumter National Monument (Agency : U.S.)685
- Conservation and restoration400
- Artillery389
- Clippings (Books, newspapers, etc.)86
- United States--History--Civil War, 1861-1865--Pamphlets86
- Boats78
- Tourism71
- Fort Moultrie (S.C.)65
- H.L. Hunley (Submarine)65
- Painting60
- Davis, Jefferson, 1808-188959
- Diaries59
- Greene, Cloe Tyler Whittle, 1843-192459
- Greene, John Newport, 1849-190259
- Lee, Robert E. (Robert Edward), 1807-187059
- National Underwater and Marine Agency59
- Submarine disasters56
- Underwater archaeology55