Era
20th century
132
19th century
65
1900-1999
41
Civil War, 1861-1865
41
1800-1899
30
Edo period, 1600-1868
25
1944-
16
18th century
12
Meiji period, 1868-1912
10
To 1500
9
21st century
8
1600-1868
7
1850-1904
6
1861-1865
6
1893-1955
6
2000-2020
6
1700-1799
5
17th century
5
1863-1954
5
1889-1951
5
1901-1981
5
1903-1986
5
Early modern, 1500-1700
5
1696-1782
4
1865-1951
4
1868-1963
4
1871-1938
4
1924-2007
4
1939-
4
1268-1559
3
15th century
3
1642-1727
3
1749-1832
3
1760-1849
3
1800-1999
3
1809-1865
3
1831-1879
3
1875-1939
3
1877-1964
3
1897-1993
3
1900-2099
3
1910-1985
3
1915-1959
3
1919-2013
3
1922-1997
3
1925-1963
3
1925-2014
3
2000-2099
3
Middle English, 1100-1500
3
To 1400
3
more ...