Era
19th century
70
To 1865
64
20th century
58
1865-1918
42
18th century
30
1960-1980
29
To 1964
25
1975-
21
1918-1945
20
Civil War, 1861-1865
20
1933-1945
19
1945-
16
1980-
15
Revolution, 1775-1783
14
1783-1865
13
20e siècle
13
1918-1932
12
1900-1999
11
Colonial period, ca. 1600-1775
10
Jusqu'à 1865
10
1964-1975
9
19e siècle
9
1815-1861
8
1964-
7
1800-1899
6
1917-
6
To 1775
6
1700-1799
5
18e siècle
5
1918-
5
1929
5
1945-1989
5
1865-1933
4
1945-1953
4
1960-
4
To 1863
4
1775-1783
3
17th century
3
1818-1895
3
1849-1861
3
1849-1877
3
1865-1900
3
1865-1945
3
1914-
3
1917-1945
3
1919-1933
3
1948-
3
Since 1945
3
1600-1775
2
1706-1790
2
more ...