For human cost we lose soldiers which can sisters, brothers, fathers, mothers, for economic it puts big debt because people lose jobs and lose money, and for political it can be a positive or negative output.
If you mean why did Spain establish settlement at St. Augustine. The reason why was because religion, treasure, and colonization.
Answer:
A the people disagree on religious beliefs
They would deplete all the resources in the area so when they took the risk of moving, there would be a new supply of food