Era
20th century
158
19th century
133
Civil War, 1861-1865
126
18th century
43
21st century
37
1945-1989
34
Revolution, 1775-1783
34
1900-1999
30
1989-
27
1945-
23
1783-1865
21
Colonial period, ca. 1600-1775
21
1800-1899
20
1861-1865
20
1809-1865
19
1946-
18
1775-1783
17
20e siècle
16
1933-1945
15
1917-1963
14
2001-2009
12
1743-1826
10
1775-1865
10
1945-1953
10
2000-2099
10
1882-1945
9
1953-1961
9
1961-1963
9
19e siècle
9
2017-2021
9
Since 1945
9
1877-1964
8
1969-1974
8
21e siècle
8
1732-1799
7
1815-1861
7
1858-1919
7
1861-1865 (Guerre de Sécession)
7
1865-1918
7
1969-
7
1980-
7
2009-2017
7
1783-1815
6
1865-1933
6
1866-1895
6
1975-
6
2021-
6
To 1775
6
17th century
5
1800-1999
5
more ...