Era
20th century
266
1900-1999
102
19th century
92
18th century
50
1960-1980
45
21st century
42
17th century
28
1980-
26
1945-1989
25
1800-1899
24
1945-
21
2000-2099
17
1989-
16
Since 1900
16
1961-1969
14
Early modern, 1500-1700
12
Puritan Revolution, 1642-1660
11
Revolution, 1789-1799
11
1789-1820
9
1800-1837
8
1865-1918
8
1933-1945
8
Revolution, 1775-1783
8
1608-1674
6
1700-1899
6
1837-1901
6
1944-
6
1958-
6
Civil War, 1861-1865
6
1600-1699
5
1609-
5
1700-1799
5
1737-1809
5
1772-1834
5
1800-1859
5
1800-1999
5
1801-1917
5
1865-1950
5
1879-1962
5
1900 - 1999
5
1918-1933
5
1970-
5
2017-2021
5
1642-1660
4
1660-1688
4
1760-1820
4
1818-1883
4
1901-1936
4
1910-1936
4
1980-2020
4
more ...