Era
19th century
455
1800-1899
133
20th century
106
18th century
93
Colonial period, ca. 1600-1775
71
1867-1957
50
1860-1890
49
17th century
36
1846-1950
36
1848-1860
33
Civil War, 1861-1865
22
To 1848
22
1890-1945
21
1866-1895
20
1900-1999
20
1734-1820
18
1775-1865
18
Revolution, 1775-1783
17
To 1846
15
1789-1851
14
1800-1999
13
1848-
13
French and Indian War, 1754-1763
13
1846-1850
12
1846-1917
12
To 1865
12
1700-1899
11
1774-1845
11
1750-1815
10
1800-1950
10
To 1803
10
1700-1799
9
1815-1861
9
1600-1775
8
1600-1799
8
1786-1836
8
1787-1865
8
1809-1868
8
1839-1876
8
1850-1950
8
To 1789
8
To 1792
8
1803-1885
7
1815-1875
7
1886-1968
7
Republic, 1836-1846
7
To 1778
7
To 1899
7
-1853
6
1775-1783
6
more ...