Era
20th century
51
19th century
31
1975-
16
To 1964
15
19e siècle
9
Civil War, 1861-1865
9
1917-
8
20e siècle
8
1900-1999
7
18th century
6
1877-1964
5
1964-1975
5
1980-
5
1743-1826
4
1800-1899
4
To 1863
4
1800-1999
3
1809-1865
3
1861-1865 (Guerre de Sécession)
3
1933-1945
3
1945-
3
Colonial period, ca. 1600-1775
3
Revolution, 1775-1783
3
To 1865
3
1783-1865
2
1861-1865
2
1863-1877
2
1865-1918
2
18e siècle
2
1901-
2
1914-
2
1919-1972
2
1925-1965
2
1929-1968
2
1946-
2
1960-1980
2
1961-1963
2
1963-1969
2
1964-
2
1981-
2
1989-
2
1700-1799
1
1700-1899
1
1800 - 1899
1
1800-talet
1
1807-1870
1
1812-1885
1
1818-1895
1
1819-1898
1
1838-1905
1
more ...