Era
20th century
1,554
19th century
679
To 1846
496
1900-1999
475
Revolution, 1835-1836
400
Civil War, 1861-1865
385
1846-1950
346
20e siècle
282
Republic, 1836-1846
249
1951-
242
21st century
200
1800-1899
193
1865-1950
170
19e siècle
142
Cretaceous
140
1861-1865
129
1793-1863
110
Permian
105
Jusqu'à 1846
92
1836-1846
91
2000-2099
72
1835-1836 (Révolution)
65
1917-1963
56
1835-1836
55
1841-1845
55
1946-
53
1861-1865 (Guerre de Sécession)
52
Since 1951
49
1836-1846 (République)
48
1929
48
1908-1973
46
1959-1993
44
1993
44
From 65 to 140 million years ago
44
1786-1836
43
1836
43
18th century
40
Pennsylvanian
40
Paleozoic
38
Revolution, 1910-1920
38
Crétacé
37
1800-1999
35
1970
35
1793-1836
34
1846-1865
34
Quaternary
32
1800-1950
30
21e siècle
30
1821-1861
28
1900 - 1999
28
more ...