Era
20th century
298
19th century
218
Civil War, 1861-1865
101
To 1863
54
To 1964
54
1900-1999
52
18th century
48
20e siècle
42
Revolution, 1775-1783
42
1800-1899
40
1863-1877
37
1964-
37
19e siècle
37
1877-1964
36
1975-
29
1865-1950
27
1917-
25
Colonial period, ca. 1600-1775
25
1818-1895
21
1775-1865
17
1929-1968
17
1856-1915
15
1861-1865
15
1809-1865
14
1887-1940
14
1964-1975
14
1868-1963
13
Civil War
13
1951-
12
1839-1871
9
1865-1877
9
1898-1976
9
1961-
9
1753-1784
8
1766-1842
8
1812-1885
8
1821-1902
8
1944-
8
1945-1953
8
21st century
8
1743-1826
7
1800-1999
7
1864?-1943
7
1865-
7
1865-1898
7
18e siècle
7
1925-1965
7
1945-
7
1954-
7
1799-1883
6
more ...