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Subject
- United States--History--Civil War, 1861-1865[remove]986
- Historic sites802
- Fort Sumter National Monument (Agency : U.S.)740
- Conservation and restoration442
- Artillery397
- Clippings (Books, newspapers, etc.)94
- Boats86
- H.L. Hunley (Submarine)73
- Tourism73
- Fort Moultrie (S.C.)67
- National Underwater and Marine Agency67
- Painting65
- Submarine disasters64
- Underwater archaeology63
- Docks42
- Illustrations26
- Soldiers25
- Museums24
- Historical reenactments21
- Historical geography--Maps20