Era
20th century
44
21st century
44
19th century
39
1946-
30
1989-
20
2000-2099
20
2017-2021
20
18th century
16
1783-1865
14
1900-1999
14
2001-2009
14
2021-
14
2017-
13
To 1865
13
1775-1783
9
1980-
9
1815-1861
8
1945-1989
8
2009-2017
8
To 1775
8
1783-1809
7
1805-1859
7
1865-1918
7
Since 1980
7
Since 1989
7
1800-1899
6
1809-1865
5
1865-1933
5
Revolution, 1775-1783
5
Since 2000
5
To 1898
5
To 1899
5
1700-1809
4
1803-1882
4
1861-1865
4
1882-1945
4
1960-1980
4
1993-2001
4
2009-
4
2020
4
Civil War, 1861-1865
4
Colonial period, ca. 1600-1775
4
1743-1826
3
1751-1836
3
17th century
3
1808-1895
3
1865-1921
3
1869-1934
3
1933-1945
3
1934-
3
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