Colonization was the thing during that time. They were searching for great lands with gold and silver. They didn't stop looking for it until they found it.
they needed more land and they wanted dominance ;
The Spanish government decided to expand its lands in North America due to the desire for wealth from precious metals, competition with other European powers, controlling trade routes, spreading Christianity, and establishing strategic settlements. These factors collectively drove Spain's ambitions in the New World. The expansion was a response to both economic interests and geopolitical dynamics of the time.
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