Era
19th century
60
Civil War, 1861-1865
51
20th century
43
Revolution, 1775-1783
12
1861-1865
8
1866-1895
7
To 1900
7
18th century
6
1933-1945
6
1945-1989
6
1821-1894
4
1917-1963
4
1946-
4
1993-2001
4
1809-1865
3
1815-1861
3
1858-1919
3
1924-
3
1961-1963
3
1963-1969
3
1989-
3
1783-1865
2
1808-1889
2
1848-
2
1865-1950
2
1869-1934
2
1887-1940
2
1908-1973
2
1909-1913
2
1913-1921
2
1929-1968
2
1981-1989
2
1991-2003
2
2001-2009
2
Colonial period, ca. 1600-1775
2
Indian occupation, 1973
2
Spanish-American War, 1898
2
War of 1812
2
1533?-1588
1
1585-1590
1
1721-1808
1
1732-1799
1
1751-1836
1
1757-1804
1
1767-1845
1
1768-1849
1
1775-1783 (Révolution)
1
1775-1783, Revolution
1
1782-1862
1
1783-1809
1
more ...