Era
20th century
10
1950-1953
6
1809-1865
4
19th century
4
1921-1977
3
1925-2008
3
1939-1945
3
1564-1616
2
1848-1929
2
1894-1956
2
1899-1980
2
1900-1999
2
1902-1968
2
1929
2
Civil War, 1861-1865
2
Colonial period, ca. 1600-1775
2
French and Indian War, 1754-1763
2
Medieval period, 987-1515
2
Revolution, 1775-1783
2
-30 B.C.
1
1167-1216
1
1475-1564
1
1600-1775
1
1754 - 1763
1
1789-1851
1
1800-1899
1
1804-1868
1
1815-1870
1
1827-1901
1
1831-1915
1
1833-1883
1
1844-1879
1
1849-1870
1
1854-1932
1
1863-1931
1
1878-1952
1
1879-1919
1
1880-1947
1
1885-1945
1
1890-1970
1
1891-1944
1
1892-
1
1899-1987
1
1900 - 1999
1
1900-1981
1
1902-1970
1
1903-1993
1
1908-
1
1908-1964
1
1910-1946
1
more ...