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Subject
- Fort Sumter (Charleston, S.C.)8
- Fortification South Carolina8
- Slave labor[remove]8
- Enslaved persons--United States7
- Confederate States of America--Defenses1
- Confederate States of America--History1
- Confederate States of America--History, Military1
- Confederate States of America--History--Sources1
- Confederate States of America. Engineer Bureau1
- Confederate States of America. Engineer Dept1
- Slavery--South Carolina1
- Slaves--United States1