Louisiana Timeline By mrbrandt Jun 11, 1541 Hernando De Soto leades expiditon into lower Mississippi river area Dec 12, 1682 La Salle claimed for France all the land drained by Mississippi river Apr 8, 1714 Louis Juchereau de St. Dennis founded Natchitoches, the first permanent town Sep 29, 1803 United States purchased Louisiana from France Apr 30, 1812 Louisiana became the 18th state admitted into the union Jul 23, 1901 oil was discoverd near Jennings and White Castle Oct 5, 2003 voters elected the first women govener of Louisiana