What did the Monroe Doctrine declare?

The Monroe Doctrine, articulated by President James Monroe in 1823, fundamentally asserted that the Western Hemisphere was no longer open to European colonization and that any attempts by European nations to interfere in the affairs of the Americas would be viewed as acts of aggression against the United States. This principle was designed to protect emerging Latin American nations from European imperialist ambitions and to safeguard U.S. interests in the region.

The declaration marked a significant shift in U.S. foreign policy, emphasizing a clear stance against European intervention, which was particularly relevant during a time when many Latin American countries were gaining independence from European powers. The Doctrine established a long-standing policy that would influence American diplomatic relations throughout the 19th and 20th centuries, signaling a commitment to stability and self-determination in the Americas which is why the assertion of "No European intervention in the Americas" stands as the correct interpretation of the Monroe Doctrine.