Era
20th century
174
1900-1999
79
21st century
76
19th century
70
2000-2099
33
1800-1899
24
18th century
19
1946-
18
2017-
14
17th century
12
16th century
10
1900-2099
10
1945-
10
2009-2017
10
Civil War, 1861-1865
10
1900 - 1999
9
1939-1945
9
2009-
8
1861-1865
7
1970-
7
1980-
7
1564-1616
6
1800-1999
6
1928-2013
6
1971-
6
2016
6
Since 2017
6
1700-1799
5
1809-1865
5
1917-1963
5
1929-1968
5
1964-
5
1965-
5
1969-
5
1989-
5
1600-1699
4
1700-1899
4
1909-2001
4
1918-1945
4
1933-1945
4
1973-
4
1993-
4
Edo period, 1600-1868
4
Since 2000
4
Since 2009
4
1452-1519
3
1732-1799
3
1783-1865
3
1811-1896
3
1812-1870
3
more ...