Era
20th century
4,804
1900-1999
2,361
20e siècle
2,139
1939-1945
1,893
21st century
1,840
Civil War, 1861-1865
1,806
Revolution, 1775-1783
1,805
19th century
1,652
1945-
1,431
Cretaceous
1,323
1990
1,319
War of 1812
1,183
2001-2009
1,049
1991-
962
19e siècle
941
2009-
862
1980
837
1946-
801
1800-1899
771
Tertiary
730
1971-1981
661
1970
648
1960-
635
2000
618
1981-2001
617
Quaternary
596
1989-
595
2000-2099
585
1961-1975
552
Since 1945
551
1980-
543
18th century
522
1951-
508
1993-
498
2003-
494
2010
494
1979-
480
Crétacé
480
From 65 to 140 million years ago
479
Paleozoic
479
1991
470
2001
469
1981-
463
21e siècle
456
1960
436
Precambrian
432
1971-
427
Cenozoic
414
Eocene
397
1952-
385
more ...