René-Robert Cavelier, Sieur de La Salle biography

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Born in Rouen, France, on November 22, 1643, René-Robert Cavelier, Sieur de La Salle was an explorer best known for leading an expedition down the Illinois and Mississippi rivers, claiming the region watered by the Mississippi and its tributaries for France, and naming it Louisiana after King Louis XIV. His last expedition was to invade and conquer part of the Spanish province of Mexico, which failed and cost La Salle his life.