Era
20th century
1,944
19th century
1,145
1900-1999
869
To 1846
657
Revolution, 1835-1836
587
Civil War, 1861-1865
566
1846-1950
455
1800-1899
393
Republic, 1836-1846
351
1900 - 1999
289
21st century
247
1861-1865
226
1951-
195
1835-1836
193
1865-1950
186
1836-1846
163
1800 - 1899
156
20e siècle
136
2000-2099
119
1793-1863
118
1861 - 1865
111
20e siècle
93
1800-1999
90
1821-1861
87
1991-2000
72
1800-1950
71
Revolution, 1910-1920
70
Since 1951
68
1836
66
1846 - 1950
66
1951-1960
66
1835 - 1836
65
18th century
58
1961-1970
56
1841-1845
55
1846-1865
52
1946-
49
1981-1990
49
19e siècle
49
1908-1973
47
1939-1945
45
19e siècle
44
Cretaceous
44
Permian
43
1800 - 1950
42
1810-1821
42
1900-2099
42
1917-1963
42
1786-1836
41
1836 - 1846
41
more ...