Era
19th century
25
Civil War, 1861-1865
15
1800-1899
10
20th century
9
1861-1865
7
-1958
5
Pleistocene
5
1861 - 1865
4
1816-1896
3
1827-1903
3
18th century
3
1900 - 1999
3
From 10 thousand to 2 million years ago
3
Ordovician
3
1700-1799
2
1800 - 1899
2
1900-1999
2
1972
2
Holocene
2
1664-1718
1
1680-1690
1
1700 - 1799
1
1700-1999
1
1709-1763
1
1733-1931
1
1751-1836
1
1754-1763 (Guerre de Sept Ans)
1
1773-1838
1
1775 - 1783
1
1775-1865
1
1780-
1
1780-1825
1
1781 - 1794
1
1781-1794
1
1787-1872
1
1789-1879
1
1799-1874
1
1800-1999
1
1802-1826
1
1802-1885
1
1804-1855
1
1809-1867
1
1819-1886
1
1821-1875
1
1826
1
1826-1902
1
1827-1892
1
1828-
1
1828-1883
1
1828-1914
1
more ...