Historical Period
1951-
86
20th century
64
1865-1950
51
Civil War, 1861-1865
27
19th century
24
To 1775
19
1775-1865
17
1861-1865
14
Colonial period, ca. 1600-1775
14
1775-1783
9
1946-
9
Revolution, 1775-1783
9
To 1865
9
18th century
8
1933-1945
8
1945-1989
8
1919-1998
7
To 1846
7
1809-1865
6
1846-1865
6
1849-1877
6
1865-1933
6
1786-1868
5
1793-1863
5
17th century
5
1812-1883
5
1848-1950
5
1850-1950
5
1882-1945
5
1924-
5
21st century
5
Revolution, 1910-1920
5
1783-1865
4
1808-1873
4
1808-1875
4
1818-1902
4
1855-1925
4
1893-1935
4
1905-1996
4
1908-1979
4
1989-
4
1588-1649
3
1644-1912
3
1732-1818
3
1736-1799
3
1750-1815
3
1815-1861
3
1830-1894
3
1835-1910
3
1846-1950
3
more ...