Alonso Álvarez de Pineda set out for Jamaica to map the coast of the Gulf of Mexico. He became the first European to observe the Texas coast. He did not finish his mission.
Cortes was sent to present day Mexico by the governor of Cuba in 1519. The Aztecs viewed Cortes and his men as gods because of their horses, firearms, and metal armor. The Spanish over throw the Aztecs. The Aztecs possessed wealth in gold and silver, which was sent back to Spain and made them very rich.
Cabeza was exploring Florida as a member of the Narvaez expedition. They got lost and were shipwrecked on Galvaston Island the Karankawas gave them food and shelter. Many died in the harsh conditions of south texas. In 1836 they arrived in Mexico City. They failed there mission.
He did not discover a faster route to India ; opende up a "new world" to India. (not in texas)
He explored the Great plains. known for Panhandle