Era
Civil War, 1861-1865
8
20th century
7
19th century
4
Colonial period, ca. 1600-1775
4
1564-1616
2
1919-1933
2
1929
2
1735-1818
1
1775-1865
1
1779-1843
1
1866-1943
1
1898-1989
1
18th century
1
1901-1909
1
1909-1913
1
1913-1921
1
1913-2005
1
1914-2003
1
1916-2004
1
1919-2012
1
1924-2004
1
1929-1968
1
1933-1945
1
1938-1945
1
1950-
1
1951-
1
1953-1961
1
1961-1969
1
1971-
1
332 B.C.-638 A.D.
1
Revolution, 1775-1783
1
To 146 B.C.
1
To 1775
1
To 332 B.C.
1
War of 1812
1