Pineda found Florida and sailed along the Gulf of Mexico in 1519.
Cortes went to the Gulf of Mexico from Cuba in the year of 1519. He later went to Tenochtitlan, the captial of the Aztec Empire in the year of 1521.
Cornado discovered America in 1540.
Cabeza de Vaca sailed to Florida in 1526. Later in the year of 1528, he got ship wrecked on Galveston Island, where the Karankawas provided them with food and shelter, then treated as slaves. He arrived in Mexico City when he and his survivors told the stories of the Gold City.
La Salle discovered Texas in 1648. He later got killed sadly by his own men.