who explored the entire mississippi to the gulf of mexico
René-Robert Cavelier, Sieur de La Salle René-Robert Cavelier, Sieur de La Salle, or Robert de La Salle (November 22, 1643 – March 19, 1687) was a French explorer. He explored the Great Lakes region of the United States and Canada, the Mississippi River, and the Gulf of Mexico. He claimed the entire Mississippi River basin for France.
History of Texas The first European to see Texas was Alonso Álvarez de Pineda, who led an expedition for the governor of Jamaica, Francisco de Garay, in 1520. While searching for a passage between the Gulf of Mexico and Asia,[22] Álvarez de Pineda created the first map of the northern Gulf Coast.[23] This map is the earliest recorded document of Texas history.[23]