Era
20th century
931
21st century
501
19th century
367
1900-1999
264
20e siècle
201
2000-2099
183
18th century
110
1800-1899
104
1945-
102
19e siècle
92
21e siècle
75
1993-
66
1939-1945
53
1989-
46
Civil War, 1861-1865
40
17th century
39
1980-
33
1800-1999
31
1990-
31
20e siècle
29
18e siècle
28
1933-1945
28
Revolution, 1789-1799
26
German occupation, 1940-1945
23
To 1500
23
1951-
22
Since 1993
22
16th century
21
1991-
21
Revolution, 1954-1962
21
Since 1900
21
Since 1945
21
21e siècle
20
1975-
19
1980-2020
19
2002-
19
Colonial period, ca. 1600-1775
19
Unification, 1990
19
2001-2009
18
1900 - 1999
17
1900-2099
17
1917-1948
17
19e siècle
16
1700-1799
15
1958-
15
1981-1995
15
Revolution, 1959
14
1861-1865 (Guerre de Sécession)
13
1935-
13
1947-
13
more ...