Era
20th century
621
21st century
281
19th century
80
1900-1999
79
1946-
69
1933-1945
48
1945-
37
2011-2020
34
1889-1945
33
2000-2099
31
Civil War, 1861-1865
31
1980-
29
18th century
26
2001-
25
2001-2009
25
1882-1945
20
1908-1973
20
1917-1963
20
1929-1968
20
1991-
20
1944-
19
1951-
19
1770-1827
18
1941-
18
1939-
17
1947-
17
1948-
17
1952-
17
1960-
17
1993-
17
17th century
16
1935-
16
2000-
16
Revolution, 1775-1783
16
1800-1899
15
1961-1970
15
1929
14
1939-1945
14
1955-
14
1978-
14
1942-
13
1975-
13
1809-1865
12
1877-1964
12
1913-1994
12
1934-
12
1936-
12
1961-1969
12
1970-
12
1988-
12
more ...