Era
20th century
22
19th century
19
1975-
16
To 1964
16
1964-1975
5
1980-
5
19e siècle
5
20e siècle
4
Civil War, 1861-1865
4
Colonial period, ca. 1600-1775
4
1800-1899
3
1960-1980
3
To 1865
3
1775-1865
2
1783-1865
2
1838-1899
2
1865-1918
2
1900-1999
2
1917-
2
1945-
2
Revolution, 1775-1783
2
1600-1775
1
1775-1899
1
1775?-1842
1
1800-1999
1
1802-
1
1849-1877
1
1861-1865 (Guerre de Sécession)
1
1863-1877
1
1865-1933
1
1865-1945
1
1877-1881
1
1891-
1
1898-
1
18th century
1
1905-1951
1
1916-
1
1918-1932
1
1933-
1
1933-1945
1
1941 July 7-
1
1945-1960
1
1946-
1
1947-
1
1960-
1
1961-1994
1
1964-
1
1981-
1
2017-2021
1
21st century
1
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