The answer to the question above is God, Gold, and Glory. The three motives that encouraged Spain to explore the Americas are God, Gold, and Glory. The Spaniards wanted to spread Christianity in the Americas as a way to colonialize them. They also wanted to search the Americas for Gold and conquer their lands to bring Glory on their empire.
the passage says "letter from the alamo" so Alamo sent the letter to warn or let Santa Anna know of his intentions to continue fighting (if its wrong then I'm sorry)
