Era
20th century
119
19th century
100
2000-2020
49
18th century
40
To 1500
40
1800-1899
37
1900-1999
32
21st century
29
1901-1966
28
17th century
18
Civil War, 1861-1865
16
1564-1616
15
1809-1882
15
1941-
15
1700-1799
13
2000-2099
13
2020-2040
12
Middle English, 1100-1500
12
1970-2000
10
Early modern, 1500-1700
10
16th century
9
Pleistocene
9
Revolution, 1775-1783
9
1800-1999
8
1920-1950
8
1785-1851
7
1880-1920
7
1935-
7
Revolution,1775-1783
7
War of 1812
7
1900-2099
6
1903-1950
6
1940-
6
1944-
6
1945-
6
1946-
6
1950-1970
6
1980-2000
6
Middle Ages, 600-1500
6
Old English, ca. 450-1100
6
1743-1826
5
1795
5
Cretaceous
5
-1400
4
1800
4
1812-1870
4
1883-1924
4
1925-1995
4
1929
4
1969-
4
more ...