What was the main purpose of the Monroe Doctrine?

The Monroe Doctrine was primarily aimed at preventing European intervention in the Americas, which is why the chosen answer is correct. Issued in 1823, the doctrine declared that any European attempts to colonize or interfere with states in the Americas would be viewed as acts of aggression that required U.S. intervention. This was a significant assertion of influence, reinforcing the idea that the Western Hemisphere was to remain distinct from European affairs and dominance.

By articulating this policy, the United States positioned itself as a protector of Latin America against European encroachment, reflecting a growing sense of nationalism and a desire to assert its sovereignty. The doctrine was not intended to promote European colonization, as that would directly contradict its purpose. Similarly, while it did establish a framework for U.S. foreign policy, it wasn't solely focused on promoting trade or expanding military presence in Europe, but rather on maintaining the independence of the already existing nations in the Americas. This strategic stance significantly shaped U.S. diplomatic relations moving into the 19th century and beyond.