Era
20th century
104
19th century
69
21st century
44
1945-1989
41
1989-
37
18th century
36
1946-
34
2017-
24
2001-2009
20
2009-2017
17
1945-
15
1933-1945
14
1980-
14
1775-1783
13
1951-
13
Since 2017
12
1775-1865
10
1865-1950
10
Civil War, 1861-1865
10
To 1775
10
17th century
9
1991-
9
Since 2000
9
1783-1809
8
1783-1865
8
1861-1865
8
1936-1953
8
Revolution, 1775-1783
8
1815-1861
7
1993-2001
7
1882-1945
6
1917-1936
6
1960-1980
6
1990-
6
2016
6
To 1865
6
1767-1845
5
1809-1865
5
1878-1953
5
1900-1999
5
2009-
5
1556-1648
4
1789-1815
4
1789-1900
4
1858-1919
4
1865-1900
4
1871-1918
4
1900 - 1999
4
1908-1973
4
1917-1963
4
more ...