Era
20th century
287
1900-1999
155
20e siècle
125
21st century
103
1939-1945
87
1989-
55
Since 1989
40
21e siècle
37
2000-2099
35
1961-1975
34
19th century
27
1991
23
2001-2009
23
2003-2011
21
1914-1918
19
19e siècle
18
18th century
17
1945-1989
17
Civil War, 1861-1865
15
1945-
13
1993-
12
Revolution, 1775-1783
12
1960-
11
1780-1831
10
18e siècle
10
1900-2099
10
1945-1955
9
World War, 1939-1945
9
1937-2006
8
1974-
8
1991-
8
Since 1945
8
World War, 1914-1918
8
1861-1865 (Guerre de Sécession)
7
1879-1967
7
1945-1953
7
1971-1981
7
1977-1981
7
1993-2001
7
Since 2001
7
1861-1865
6
1939-1975
6
1942-
6
1980-1988
6
2003-
6
Soviet occupation, 1979-1989
6
1800-1899
5
1900 - 1999
5
1927-1997
5
1950-1953
5
more ...