Era
20th century
262
1945-1989
91
19th century
77
1946-
74
1933-1945
73
1951-
66
1989-
56
2001-2009
54
1865-1950
50
1775-1783
47
21st century
38
1809-1865
37
2009-2017
34
1913-1994
33
1861-1865
32
18th century
32
1837-1901
31
1993-2001
31
Civil War, 1861-1865
29
Revolution, 1775-1783
29
1783-1809
28
1882-1945
23
1969-1974
23
2017-
23
1775-1865
22
1815-1861
21
1945-
21
1917-1936
19
1917-1963
18
1953-1961
18
16th century
17
1858-1919
17
1961-1963
17
2016
17
1783-1789
16
1945-1953
16
1963-1969
15
1981-1989
15
1900-1999
14
1908-1973
14
1783-1865
13
1889-1945
13
1890-1969
13
1901-1953
13
1980-
13
1743-1826
12
1874-1965
12
1936-1953
12
1977-1981
12
1732-1799
11
more ...