Era
20th century
4,850
1900-1999
2,413
20e siècle
2,255
1939-1945
1,960
21st century
1,845
Revolution, 1775-1783
1,812
Civil War, 1861-1865
1,811
19th century
1,670
1945-
1,431
1990
1,331
Cretaceous
1,328
War of 1812
1,184
2001-2009
1,057
19e siècle
982
1991-
958
2009-
862
1980
843
1946-
797
1800-1899
785
Tertiary
732
1970
660
1971-1981
660
2000
639
1960-
622
1981-2001
621
Quaternary
605
1989-
596
2000-2099
588
Since 1945
563
1961-1975
561
1980-
540
18th century
526
1951-
509
1993-
499
2003-
495
2010
494
Crétacé
485
From 65 to 140 million years ago
484
Paleozoic
484
1991
478
2001
476
1979-
468
21e siècle
462
1981-
456
1960
441
Precambrian
433
1971-
423
Cenozoic
417
Eocene
398
2005
390
more ...