Era
Civil War, 1861-1865
9
Revolution, 1775-1783
6
19th century
5
1854-1861
4
To 1865
4
1809-1858
3
1789-1815
2
1806 or 1807-1857
2
1840
2
1849-1877
2
1856
2
1865-1950
2
18th century
2
20th century
2
Mexican War, 1846-1848
2
Revolution
2
To 1775
2
War of 1812
2
1752-1832
1
1760-1789
1
1768-1846
1
1775-1783
1
1775-1865
1
1783-1815
1
1800-1899
1
1802-1890
1
1809-1817
1
1809-1865
1
1817-1825
1
1821-1893
1
1836
1
1846-1850
1
1846-1914
1
1854
1
1857-1861
1
1861-1865
1
1861-1865, Civil War
1
1900-1999
1
1905-1978
1
1908-1993
1
1912-
1
1917-
1
1918-
1
1925-2011
1
1932-2007
1
1933-1945
1
1937-2003
1
1947-
1
1967-
1
1970-2009
1
more ...