Era
Civil War, 1861-1865
35
Civil War
11
19th century
9
Revolution, 1775-1783
9
Colonial period, ca. 1600-1775
7
1861-1865
5
1812-1815
3
1815-1861
3
20th century
3
1706-1790
2
1789-1815
2
1796-1859
2
1800-1861
2
1808-1873
2
1809-1865
2
1813-1861
2
1855-1936
2
1869-1934
2
1914-
2
1915-1987
2
1918-
2
1927-
2
1952-
2
Since 1952
2
War with Mexico, 1845-1848
2
-1625?
1
1510-1549
1
1550-1615
1
1652-1725
1
1660-1674
1
1720-1789
1
1724-1797
1
1731-1821
1
1732-1799
1
1733-1804
1
1734-1806
1
1734-1816
1
1740-1808
1
1740-1821
1
1745-1796
1
1745-1803
1
1750-1831
1
1757-1800
1
1758-1846
1
1759-1817
1
1767-1845
1
1771-1849
1
1773-1838
1
1775-1783
1
1775-1865
1
more ...