Era
20th century
8,319
1900-1999
2,799
19th century
2,719
21st century
1,220
1900 - 1999
1,066
To 1846
1,017
1846-1850
908
1850-1950
637
1800-1899
569
1951-
521
2000-2099
501
20e siècle
428
Civil War, 1861-1865
264
18th century
239
Tertiary
229
1800 - 1899
207
1939-1945
204
Miocene
203
1947-
186
1950-
178
Pleistocene
176
1713-1784
175
Since 1951
170
Cenozoic
168
Quaternary
158
20e siècle
148
Pliocene
145
1944-
139
1934-
137
1800-1999
136
1900-2099
136
Cretaceous
136
1991
133
1970
124
1961-1970
123
1971-1980
123
21e siècle
119
1902-1968
116
1945-
113
1990
110
1994
109
1850
108
1803-1880
107
1927-1993
106
1989
103
From 2 to 65 million years ago
103
1861-1865
102
1992
101
Eocene
101
1929
98
more ...