Era
20th century
141
19th century
55
1945-
48
1900-1999
36
21st century
30
1970-
24
Since 1900
22
18th century
20
To 1500
18
1918-1945
16
2000-2099
14
1980-
12
1783-1865
11
1800-1999
11
1800-1899
10
1865-1918
9
Civil War, 1861-1865
9
17th century
8
To 146 B.C.
8
16th century
7
Since 1945
7
1700-1799
6
1268-1559
5
1945-1989
5
Since 1970
5
1709-1784
4
1740-1795
4
1976-
4
Revolution, 1775-1783
4
Victoria, 1837-1901
4
1066-1485
3
1559-1789
3
1801-1917
3
1868-1945
3
1933-1945
3
1946-1970
3
1970-1988
3
1288-1918
2
1564-1616
2
1600-1775
2
1644-1912
2
1765-1947
2
1789-
2
1800-1917
2
1809-1865
2
1813-1883
2
1845-1998
2
1868-
2
1882-1941
2
1890-1970
2
more ...