Explain how the united states gained influence in latin america

The correct answer to this open question is the following.

The United States has gained influence in Latin America since the times of President Monroe when his administration dictated the foreign policy called "Monroe Doctrine," in which he made clear to European powers that they had to stop messing around in the Latin American issues. European powers would not be able to interfere with issues in Latin America. If they did so, that would be considered an aggression against the United States. From that time, the US has been the country that has influenced Latin America issues because the US has many economic and political interests in the region.

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