With the arrival of Francisco Vázquez de Coronado, a Spanish conquistador, the first recorded history of encounter between Europeans and Native Americans in the Great Plains occurred in Texas, Kansas and Nebraska from 1540-1542. In that same time period, Hernando de Soto crossed a west-northwest direction in what is now Oklahoma and Texas. Today this is known as the De Soto Trail. <answer>The Spanish</answer> thought the Great Plains were the location of the mythological Quivira and Cíbola, a place said to be rich in gold.
who thought the great plains were the locations of Quivira and Cíbola?
The Spanish