That depends, who's asking?
Answer:
The christians that Cabeza de Vaca met were spaniards in the lands of New Spain (Modern-day Mexico).
Explanation:
Álvar Nuñez Cabeza de Vaca and other men explored American southwhest meeting many american tribes in what is now the states of Florida, Texas, California and Mexico, among others. His expedition was filled with difficulties since the very beginning. There were very few companions with him when they met some spaniards near the gluf of California. They were found in the lands of New Spain (Now Mexico) and the they were sent to Mexico City where they could sail back to Europe.
No, unless you register to vote in New York.