Era
19th century
29
Civil War, 1861-1865
28
1848-
12
20th century
12
1848-1950
9
1800-1899
8
1861-1865
8
1841
7
Permian
7
1846-1865
6
1846-1950
6
1849-1853
6
1850
6
To 1846
6
To 1848
6
1837-1911
5
1846-1850
5
1861 - 1865
5
Since 1848
5
1854-1930
4
1855-1928
4
1900-1999
4
19e siècle
4
17th century
3
1800 - 1899
3
1809-1867
3
1838-1915
3
1861-1865 (Guerre de Sécession)
3
1861-1865 (Guerre de Sécession)
3
18th century
3
Paleozoic
3
Revolution, 1910-1920
3
1600-1699
2
1816-1886
2
1835-1914
2
1842-1912
2
1845-1861
2
1846-approximately 1910
2
1850-1853
2
1853-
2
1899-1902
2
1900 - 1999
2
1911-
2
1940-
2
1946-
2
1949-
2
From 230 to 280 million years ago
2
From 230 to 570 million years ago
2
Philippine American War, 1899-1902
2
Quaternary
2
more ...