Era
1990
27
Proterozoic
24
Precambrian
19
20th century
17
From 570 million to 5 billion years ago
15
19th century
14
1900-1999
13
From 570 million to 2 billion years ago
9
Pleistocene
9
2000
8
1867-1959
7
20e siècle
7
Archaean
7
Civil War, 1861-1865
7
Protérozoïque
7
1980
6
1800-1899
5
1934-
5
1950
4
1970
4
21st century
4
From 10 thousand to 2 million years ago
4
Ordovician
4
Pléistocène
4
1848-
3
1848-1950
3
1861-1865
3
1861-1865 (Guerre de Sécession)
3
1884-1972
3
1960
3
19e siècle
3
2000-2099
3
Archéen
3
Quaternary
3
1807-1882
2
1811-1875
2
1812-1815
2
1869-1914
2
1897-1965
2
1916-1999
2
1939-1945
2
1967-
2
1981-1993
2
2010
2
From 2 million years ago
2
From 2 to 5 billion years ago
2
From 425 to 500 million years ago
2
Geschichte 1840-1950
2
Précambrien
2
Quaternaire
2
more ...