Era
20th century
230
21st century
86
1900-1999
77
19th century
43
2000-2099
38
20e siècle
34
21e siècle
20
1945-
15
1939-1945
12
1800-1899
10
Civil War, 1861-1865
10
20e siècle
8
1564-1616
7
1899-1977
7
18th century
7
1800-1999
6
1960-
6
1421-1737
5
15th century
5
1900 - 1999
5
1917-1967
5
1944-
5
1947-
5
1990-
5
19e siècle
5
1791-1841
4
1861-1865 (Guerre de Sécession)
4
1874-1902
4
1914-1918
4
1929-1945
4
1936-1953
4
1938-
4
1949-
4
1960-1980
4
1961-1975
4
1968-
4
2010
4
Nicholas II, 1894-1917
4
-1329?
3
-1992
3
1452-1498
3
14th century
3
15e siècle
3
1834-1873
3
1861-1865, Civil War
3
1867-1910
3
1870-1940
3
1888-1948
3
1914-1975
3
1918-1993
3
more ...