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Subject (Era)
- 20th century1,026
- 19th century524
- 18th century332
- 16th century205
- 17th century184
- Colonial period, ca. 1600-1775130
- Revolution, 1775-1783123
- Civil War, 1861-1865112
- Revolution, 1789-179999
- To 150066
- 15th and 16th centuries63
- 1945-57
- Revolution, 1917-192155
- 1933-194554
- To 181047
- Middle Ages, 600-150046
- 21st century43
- 1789-181536
- Qing dynasty, 1644-191235
- Civil War, 1936-193932