Era
20th century
22
1945-
15
2001-2009
14
1900-1999
12
1981-2001
11
1989-
11
1993-2001
10
Since 1945
10
1945-1989
9
21st century
7
Civil War, 1861-1865
7
1861-1865
6
1980-
6
2009-2017
6
Since 1981
5
Since 1989
5
1783-1865
4
1971-1981
4
1981-
4
1977-1981
3
1981-2009
3
2001-
3
2001-2017
3
2009-
3
20e siècle
3
Since 1980
3
1898-1959
2
1939-1975
2
1942-
2
1953-
2
1969-
2
1971-2001
2
1988-
2
1989-1993
2
1991-
2
1993-
2
1993-2009
2
19th century
2
2000-2099
2
ESTADOS UNIDOS
2
Since 1993
2
To 1775
2
1547-1616
1
1743-1826
1
1773-1859
1
1775-1783 (Révolution)
1
1783-1918
1
1789-1900
1
1800-1899
1
1809-1849
1
more ...