Era
20th century
51
Civil War, 1861-1865
18
1901-1953
16
1929
11
1961-1969
7
1929-1968
6
21st century
6
1969
3
19th century
3
Revolution, 1775-1783
3
1878-1946
2
1942-
2
1944-
2
1953-1961
2
Early accounts to 1600
2
To 1964
2
1783-1865
1
1800?-1831
1
1818-1895
1
1862-1931
1
1863-1877
1
1864?-1943
1
1877-1964
1
1887-1940
1
1889-1999
1
1891-1995
1
1895-1963
1
1899-1974
1
1902-1967
1
1905-1989
1
1909-2001
1
1912-1987
1
1913-2005
1
1915-1998
1
1920-1951
1
1922-1987
1
1924-
1
1924-1987
1
1925-1965
1
1925-1996
1
1933-
1
1933-1945
1
1935-
1
1937-
1
1940 Feb. 21-
1
1940 February 21-
1
1941-1955
1
1945-1953
1
1948-1969
1
1951-
1
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