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Subject (Era)
- Civil War, 1861-186529,147
- 20th century23,790
- Revolution, 1775-178315,798
- 19th century10,908
- War of 18123,361
- Colonial period, ca. 1600-17753,256
- 18th century3,023
- 21st century2,905
- 1861-18651,864
- 1900-19991,800
- 1775-17831,695
- French and Indian War, 1755-17631,425
- 1933-1945986
- 1945-1989985
- 1783-1865979
- 1945-890
- 1815-1861652
- To 1775651
- 1800-1899645
- 1989-504