Era
20th century
44
19th century
27
Civil War, 1861-1865
17
To 1964
14
18th century
10
Revolution, 1775-1783
10
To 1863
9
1877-1964
8
1800-1899
6
1975-
6
19e siècle
6
1856-1915
5
1861-1865
5
1863-1877
5
1887-1940
5
1805-1879
4
1818-1895
4
1821-1902
4
1898-1976
4
1900-1999
4
1917-
4
1964-
4
Colonial period, ca. 1600-1775
4
1753-1784
3
1775-1865
3
1799-1883
3
1809-1865
3
1861-1865 (Guerre de Sécession)
3
1944-
3
1945-
3
1964-1975
3
20e siècle
3
1731-1806
2
17th century
2
1800-talet
2
1803-1890
2
1814-1869
2
1820?-1913
2
1834
2
1843-1916
2
1854
2
1858-1955
2
1861
2
1864?-1943
2
1865-1877
2
1865-1933
2
1865-1950
2
1868-1963
2
1893-1955
2
1903-1946
2
more ...