Era
20th century
143
1900-1999
76
19th century
53
1898-1951
44
1800-1899
30
1939-1945
22
1775-1865
18
20e siècle
18
Colonial period, ca. 1600-1775
17
1933-1945
14
Civil War, 1861-1865
14
1600-1775
13
1945-1953
11
1861-1865
10
1865-1898
10
1900 - 1999
10
1775 - 1865
9
1951-
9
21st century
9
1800 - 1899
8
1933-1953
7
1962-
7
Since 1900
7
Since 1951
7
1911
6
19e siècle
6
New York
6
1856-1939
5
1861 - 1865
5
18th century
5
1939 - 1945
5
1900-1910
4
1700-1799
3
17th century
3
1809-1849
3
1810-1891
3
1861-1865 (Guerre de Sécession)
3
1869-1938
3
1875-1961
3
1880-1890
3
1883
3
1897-1962
3
1897-1969
3
1898 - 1951
3
1900-2099
3
1914-1918
3
1961-1975
3
1965
3
1993
3
2000-2099
3
more ...