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Subject (Topic)
- Batteries (Ordnance)12
- Armored vessels10
- Bombardment6
- Siege warfare6
- Turret ships6
- Blockade5
- Ordnance5
- Steamboats5
- Torpedoes5
- Defenses3
- Parrott gun3
- Boarding schools--South Carolina--Columbia2
- Bunkers (Fortification)2
- Convents--South Carolina--Columbia2
- Gunboats2
- Military camps2
- Offensive (Military science)2
- Powder magazines2
- Ships2
- Ursulines--South Carolina--Columbia2