Era
20th century
87
1900-1999
46
19th century
30
21st century
20
1800-1899
11
1946-
7
18th century
6
1939-1945
6
2000-2099
6
Civil War, 1861-1865
6
1900-2099
5
1921-
4
1933-1945
4
1800-1999
3
1816-1888
3
1914-1918
3
1925-2006
3
1981-
3
2001-2009
3
1700-1799
2
1775-1783
2
1865-1945
2
1888-1979
2
1895-
2
1900 - 1999
2
1910-2008
2
1918-1932
2
1918-1945
2
1919-1933
2
1921-1942
2
1921-2005
2
1923-2003
2
1930-
2
1932-2010
2
1933-
2
1945-
2
1948-
2
1981-2001
2
1985-
2
1988-
2
1989-
2
2001-
2
2009-
2
20e siècle
2
German occupation, 1940-1945
2
Revolution, 1775-1783
2
To 1964
2
(1946- ...)
1
1500-1700
1
1700-1899
1
more ...