Era
20th century
84
19th century
72
Civil War, 1861-1865
19
18th century
10
Revolution, 1775-1783
8
1775-1783
5
17th century
5
1888-1953
5
1899-1961
5
1906-2001
5
1946-
5
1809-1865
4
1843-1916
4
1853-1890
4
1876-1933
4
1882-1945
4
1884-1963
4
1896-1940
4
Civil War, 2011-
4
1732-1799
3
1735-1826
3
1740-1795
3
1770-1827
3
1783-1809
3
1783-1865
3
1809-1882
3
1835-1910
3
1837-1920
3
1854-1912
3
1860-1940
3
1875-1926
3
1884-1962
3
1884-1972
3
1885-1962
3
1911-1979
3
1913-1994
3
1945-1989
3
Colonial period, ca. 1600-1775
3
To 1775
3
1079-1142
2
16th century
2
1743-1826
2
1751-1836
2
1775-1817
2
1788-1824
2
1795-1821
2
1797-1851
2
1809-1847
2
1812-1870
2
1817-1862
2
more ...