| 1541 | | 8 May:
Hernando de Soto reaches the Mississippi.AotC tGLIoAH |
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| 1784 | |
| 1796 | |
| 1812 | |
| 1920 | | 18 Aug:
With the passing of the nineteenth amendment, women win the right to vote.USCensus OurDocs |
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| 1925 | |
| | 25 May:
John T. Scopes is indicted for teaching Darwinian evolution theory.LHL ABAJ |
|
| | 10 Jul:
Jury selection begins for the Scopes Monkey Trial.npr MTSU |
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| 1950 | | 24 Sep:
Black Sunday occurs when smoke from forest fires in western Canada makes its way east, darkening the skies in the eastern United States and Canada and as far away as western Europe.BLM WR |
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| |
| 1968 | |
| 1971 | | 18 Jun:
Federal Express Corporation is founded in Little Rock, Arkansas.CH CNN |
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| 1986 | |