need help with history question i cant find the answer.?

I think you just didn't look in the right place for the answer. Here's what Wikipedia has to say (I found this in 5 seconds):

The Monroe Doctrine was a United States policy that was introduced on December 2, 1823, which said that further efforts by European governments to colonize land or interfere with states in the Americas would be viewed by the United States of America as acts of aggression requiring US intervention.[1] The Monroe Doctrine asserted that the Western Hemisphere was not to be further colonized by European countries, and that the United States would not interfere with existing European colonies nor in the internal concerns of European countries.
 
The goal of the Monroe Doctrine was to get Europe's foothold out of the Americas. This would free the colonies in the New World from the countries in the Old World. They were worried Spain would try to regain a foothold in South or Central America. The policy was followed by the presidents that followed because it's helped to keep America safer by not having other nations colonize.
 
Back
Top