Era
20th century
73
19th century
32
Civil War, 1861-1865
20
21st century
15
1933-1945
6
1809-1865
5
Revolution, 1775-1783
5
1843-1942
4
1929
4
16th century
3
1853-1890
3
1868-1952
3
1874-1940
3
1876-1950
3
1894-1978
3
18th century
3
1904-1979
3
1915 or 1916-1993
3
1915-1976
3
1918-
3
1918-1945
3
1920-2005
3
1921-1930
3
1945-
3
1452-1519
2
1564-1616
2
1756-1791
2
1770-1827
2
1796-1872
2
17th century
2
1817-1862
2
1821-1882
2
1834-1902
2
1840-1882
2
1865-1898
2
1867-1959
2
1870-1952
2
1879-1973
2
1890-1970
2
1898-1993
2
1905-1979
2
1909-1975
2
1910-1989
2
1913-1998
2
1915-1998
2
1917-1963
2
1919-1933
2
1945-1970
2
1946-
2
1947-
2
more ...