What sort of soldiers were primarily used by the Spanish in the invasion of the

What sort of soldiers were primarily used by the Spanish in the invasion of the north, and why were they so useful?
What happened to Cabeza de Vaca, and why was the book he wrote so important? (see Slideshare Images 2-9)
Who was Tenemaxtle and what did he do? (SSIs 10-15)
How and why did the Spanish finally successfully begin the settlement of the north?
What was the policy of “guerra a fuego y a sangre”? As this grew even more violent towards the rights of the Chichimecs, how did the Catholic Church counter it?
How did the Tlaxcalan Indians help the church in the expansion to the north, and how were they rewarded for their efforts?
Why was Juan de Onate removed as governor of New Mexico?
Why were the Pueblo Indians an “attractive and convenient” choice for conquest?
Why did the Great Pueblo Rebellion come about, and how did the Spanish manage to reconquer New Mexico? (SSIs 16-44)
Who were the genizaros?

Book Link:
https://ouleft.org/wp-content/uploads/recovering-history-constructing-race.pdf