Era
20th century
112
18th century
44
19th century
37
1900-1999
30
1783-1850
26
1945-
26
1945-1989
25
1783-1865
19
20e siècle
16
21st century
13
1989-
12
Civil War, 1861-1865
10
1900-2099
8
Constitutional period, 1789-1809
8
Revolution, 1775-1783
8
Since 1945
7
1800-1899
6
Colonial period, ca. 1600-1775
6
1918-1945
5
1933-1945
5
1981-2001
5
To 1775
5
1700-1799
4
1797-1801
4
1856-1950
4
1960-1980
4
19e siècle
4
1775-1783
3
1789-1809
3
1815-1861
3
18e siècle
3
1939-1945
3
1945-1991
3
1949-
3
1951-
3
1969-1974
3
1970-
3
1971-
3
1993-2001
3
Geschichte
3
1564-1616
2
1727-1760
2
1729-1797
2
1783-1809
2
1800-1837
2
1803-1882
2
1812-1870
2
1821-1896
2
1861-1865
2
1971-1981
2
more ...