Era
19th century
4
20th century
4
1945-1989
3
1946-
3
2001-2009
3
20th century --
3
Civil War, 1861-1865
3
1989-
2
2001-
2
Colonial period, ca. 1600-1775
2
To 1789
2
1600-1659
1
1762-1829
1
1838-1905
1
1882-1965
1
1890-1969
1
1891-1937
1
1894-1971
1
1921-
1
1923-1929
1
1929-1968
1
1932-
1
1945
1
1945-
1
1950-
1
1951-
1
1960-
1
1961-
1
1961-1963
1
1964-
1
1969-1974
1
1970-
1
1973-
1
1980-
1
1981-1989
1
1985-1995
1
1989-1993
1
2008
1
21st century --
1
Revolution, 1775-1783
1
To 1763
1
To 1810
1
To 1865
1