Select:
•Fascist Governments
•Dictatorships
•Totalitarian governments
•Absolute monarchies
The main reason why the United States was so interested in the security of Latin America is because the Latin American countries were so close to the US, meaning that if they were invaded by European powers it would post a threat to the US.
I think that the answer is a massive reinvestment in capital industry.
The conquistadors came looking for gold and other valuable things.