The Monroe Doctrine was the declaration by President James Monroe, in December 1823, that the United States would not tolerate a European nation colonizing an independent nation in North or South America.
The Monroe Doctrine was the declaration by President James Monroe, in December 1823, that the United States would not tolerate a European nation colonizing an independent nation in North or South America.
https://www.thoughtco.com/monroe-doctrine-1773384
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