Era
20th century
9
Civil War, 1861-1865
5
1822-1913
4
1929-1968
4
1732-1799
3
1799-1883
3
1809-1865
3
19th century
3
Revolution, 1775-1783
3
1818-1895
2
18th century
2
To 1863
2
1706-1790
1
1720-1801
1
1731-1802
1
1783-1865
1
1800-1859
1
1807-1870
1
1808-1863?
1
1815 or 1816-
1
1822-1885
1
1827-1900
1
1848-1969
1
1856-1915
1
1861-1865
1
1863-1877
1
1865-1877
1
1874-1938
1
1876-1938
1
1884-1962
1
1911-1972
1
1912-1987
1
1919-1933
1
1921-2003
1
1929
1
1933-1945
1
1939-2018
1
1940-2020
1
1941-1955
1
1988
1
2001
1
War of 1812
1