Era
20th century
21
19th century
9
1951-
7
1865-1950
4
1865-1877
2
1941-1955
2
21st century
2
Civil War, 1861-1865
2
To 1900
2
1862-1931
1
1863-1877
1
1865-1900
1
1865-1951
1
1884-1954
1
1884-1956
1
1897-1966
1
1898-1974
1
18th century
1
1901-1995
1
1913-2005
1
1914-1991
1
1918-1961
1
1920-1980
1
1924-2006
1
1929-1968
1
1933-1945
1
1945-1989
1
1948
1
1953-1961
1
1961-1969
1
1964-1975
1
1972-
1
20 century
1
Colonial period, ca. 1600-1775
1
To 1964
1