Era
Civil War, 1861-1865
24
20th century
22
Revolution, 1775-1783
10
19th century
8
21st century
7
To 1901
6
1900-1999
5
Civil War, 1936-1939
5
1809-1865
3
1933-1945
3
1954-
3
Revolution, 1917-1921
3
17th century
2
1882-1945
2
1919-2014
2
1945-
2
1971-1980
2
2000-2099
2
Colonial period, ca. 1600-1775
2
War of 1812
2
1135-1154
1
1506-1552
1
1520-1598
1
1533-1603
1
1590-1657
1
1600-1750
1
1639-1718
1
16th century
1
1700-1899
1
1800-1837
1
1800-1899
1
1815-1891
1
1832-1883
1
1835-1919
1
1837-1915
1
1849-1877
1
1849-1919
1
1860-1904
1
1861-1865
1
1861-1865 (Guerra civil)
1
1890-1969
1
1898-1951
1
1898-1952
1
1898-1973
1
18th century
1
1900-1945
1
1902-1974
1
1906-1972
1
1907
1
1912-1967
1
more ...