Era
20th century
228
To 1775
144
1971-
130
1783-1865
120
1945-1970
97
19th century
95
1918-1945
90
1865-1918
77
20e siècle
67
Colonial period, ca. 1600-1775
49
1900-1999
46
Jusqu'à 1775
41
18th century
37
1945-
35
Civil War, 1861-1865
35
1775-1783
30
1933-1945
26
To 1865
26
Revolution, 1775-1783
22
Since 1900
22
19e siècle
21
Since 1971
20
17th century
18
1970-
17
1815-1861
16
1919-1933
16
ca 1600-1775 (Période coloniale)
15
1775-1865
13
18e siècle
13
1961-1969
13
1808-1875
11
1975-
11
1929
10
1800-1899
9
1865-1877
9
1951-
9
21st century
9
To 1783
9
1809-1865
8
1858-1919
8
1945-1989
8
1980-2020
8
1783-1848
7
1861-1865 (Guerre de Sécession)
6
1917-1963
6
1918-1932
6
1940-
6
1960-1980
6
1964-
6
Since 1945
6
more ...