Era
20th century
69
19th century
30
Civil War, 1861-1865
20
21st century
14
1933-1945
6
1809-1865
5
Revolution, 1775-1783
5
1843-1942
4
16th century
3
1853-1890
3
1868-1952
3
1874-1940
3
18th century
3
1918-1945
3
1920-2005
3
1929
3
1945-
3
1564-1616
2
1756-1791
2
1770-1827
2
1796-1872
2
17th century
2
1817-1862
2
1821-1882
2
1834-1902
2
1840-1882
2
1865-1898
2
1867-1959
2
1870-1952
2
1876-1950
2
1894-1978
2
1915-1998
2
1917-1963
2
1919-1933
2
1945-1970
2
1946-
2
1947-
2
1949-
2
1952-
2
1959-
2
1969-
2
1971-
2
Colonial period, ca. 1600-1775
2
Edo period, 1600-1868
2
Medieval, 500-1500
2
To 146 B.C.
2
World War, 1939-1945
2
-1400
1
-1516
1
-1880
1
more ...