Era
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1870-1937
1
1874-1964
1
1877-1964
2
1882-1945
2
1884-1972
1
1885-1954
1
1887-1940
2
1890-1965
1
1893-1897
1
1898-1974
1
18th century
3
1901-1953
1
1902-2003
1
1907-1998
1
1908-1973
2
1909-1998
1
1914-1991
1
1917-1963
1
1918-
3
1918-1961
2
1924-
3
1925-1968
1
1929-1968
1
1933-1945
5
1933-1953
1
1945-
6
1945-1989
6
1946-
1
1948
1
1951-
72
1961-1963
1
1963-1969
1
1964
1
1970-
1
1974-1977
1
1976
1
1977-1981
2
1988
1
1989-
4
19th century
47
2001-2009
2
2012
1
2016
1
20th century
38
21st century
2
Civil War, 1861-1865
30
Filibuster War, 1855-1860
1
Since 1865
2
To 1775
4
To 1865
2
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