Era
20th century
141
19th century
110
Civil War, 1861-1865
93
Revolution, 1775-1783
41
To 1863
40
18th century
30
1900-1999
24
1917-
23
To 1964
23
1975-
22
19e siècle
21
20e siècle
21
1863-1877
19
1800-1899
18
1877-1964
17
1964-
16
1818-1895
13
Civil War
13
1861-1865
12
Colonial period, ca. 1600-1775
11
1929-1968
10
1964-1975
10
1865-1877
9
1809-1865
8
1945-1953
8
1743-1826
7
1856-1915
7
1821-1902
6
1839
6
1861-1865 (Guerre de Sécession)
6
1984
6
1800-1999
5
1812-1885
5
1857-1861
5
1862
5
1865-1898
5
1865-1900
5
1865-1918
5
1887-1940
5
1898-1976
5
1933-1945
5
1945-
5
1960-1980
5
1963-1969
5
To 1865
5
1753-1784
4
1775-1865
4
1799-1883
4
1817?-1895
4
1859
4
more ...