Era
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1837-1904
1
1843-1901
1
1844
1
1854-1861
1
1863
1
1865-
1
1867-1918
1
1867-1934
1
1868-
1
1876
1
1877-1881
1
1898
1
1900
1
1920-
1
1932?-
1
1933-1945
1
1936
1
1938-
1
1938-1991
1
1945-1989
1
1960
1
1963-
1
1974-
1
1974-1977
1
1985
1
2016
1
2017-2021
1
20e siècle
1
21e siècle
1
Civil War, 1861-1865
1
Pennsylvania, 1976
1
Revolutionary War
1
Since 1900
1
To 1950
1