Era
20th century
10
19th century
6
1761-1849
4
Civil War, 1861-1865
4
1867-1959
3
Ordovician
3
1792-1865
2
1800-1899
2
1861-1865
2
1900-1999
2
Cretaceous
2
1732-1799
1
1754
1
1755-1835
1
1775-1865
1
1775-1899
1
1792 - 1865
1
1800 - 1899
1
1807 or 1808-1829
1
1807 or 8--
1
1843
1
1854-
1
1861 - 1865
1
1892
1
18th century
1
1900 - 1999
1
1909-
1
1909-2010
1
1914-1918
1
1972
1
1990
1
Colonial period, ca. 1600-1775
1
French and Indian War, 1754-1763
1
French and Indian War, 1755-1763
1
From 65 to 140 million years ago
1
Geschichte
1
Paleozoic
1
Revolution
1
Revolution, 1775-1783
1
Siege, 1864-1865
1
To 1846
1
War of 1812
1
b. 1778
1