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  Rene-Robert Cavelier and Sieur de La Salle claim territory by Mississippi River from Canada to Gulf of Mexico and names it Louisiana.
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  Spain closes the lower Mississippi and New Orleans to foreigners.
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  The French Revolution begins
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  Spain cedes Louisiana to France, in exchange for a small kingdom in Italy.
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  Thomas Jefferson officially announces the purchase of the Louisianan territories.
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  France formally transfers the Louisiana Territories to the French.