René-Robert Cavelier, Sieur de La Salle
In 1682, René-Robert Cavelier, Sieur de La Salle was the first European to travel from the Great Lakes down the Mississippi River to the Gulf of Mexico. The French began dreaming of building a great empire by linking the Saint Lawrence and Mississippi basins, thereby bottling up the English on the Atlantic coast. This presented diplomatic problems; because the Gulf coast was claimed, but not occupied, by Spain.