Era
20th century
45
Civil War, 1861-1865
22
19th century
20
1809-1865
15
2000-2020
15
17th century
14
1900-1999
8
21st century
8
1564-1616
7
Revolution, 1775-1783
7
1861-1865
6
16th century
5
1800-1899
5
1935-1977
5
1956-
4
1989-
4
Early modern, 1500-1700
4
1696-1782
3
1797-1851
3
1827-1895
3
1857-1861
3
18th century
3
1945-
3
1945-1970
3
2020-2040
3
Colonial period, ca. 1600-1775
3
Since 1900
3
1500-1599
2
1548-1600
2
1632-1677
2
1775-1783
2
1812-1870
2
1874-1965
2
1879-1955
2
1897-1962
2
1900-2099
2
1912-2016
2
1945-1989
2
1947-
2
1969-
2
1971-
2
1981-1989
2
2000-2099
2
20e siècle
2
Confederation, 1783-1789
2
Geschichte
2
Old English, ca. 450-1100
2
Since 1945
2
To 1500
2
Tudors, 1485-1603
2
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