Era
20th century
14
1945-
5
1945-1989
4
21st century
4
1933-1945
3
19th century
3
1975-1985
2
1985-1995
2
1989-
2
2008
2
1775-1783
1
1858-1919
1
1865-1918
1
1889-1945
1
18th century
1
1901-1909
1
1913-1994
1
1945-1953
1
1946-
1
1960-
1
1963-1969
1
1964-
1
1973-
1
1977-
1
1980-
1
2001-
1
2001-2009
1
2009-
1
Civil War, 1861-1865
1
To 1775
1