Era
19th century
189
To 1803
108
20th century
101
Civil War, 1861-1865
81
1800-1899
58
18th century
48
1865-1950
44
1900-1999
38
2005
35
1803-1865
28
21st century
27
1850-1904
23
1861-1865
20
1981-1990
20
1991-2000
17
2000-2099
17
1951-
15
1893-1935
14
1643-1687
9
1800-1999
9
1951-1960
9
1961-1970
9
1971-1980
9
1700-1799
8
2001-2010
8
To 1821
8
War of 1812
8
1801-1809
7
1808-1863?
7
1931-1940
7
1743-1826
6
1767-1845
6
1921-1930
6
To 1763 (New France)
6
1700-1899
5
1785-1851
5
17th century
5
1901-1971
5
1933-2019
5
Colonial period, ca. 1600-1775
5
To 1846
5
1716-1795
4
1749-1800
4
1783-1865
4
1794-1881
4
1800 - 1899
4
1815-1861
4
1842-1909
4
1844-1925
4
1851 or 1852-1932
4
more ...