Monroe Doctrine

(1823)

On December 2, 1823, in his seventh annual message to Congress, U.S. President James Monroe issued a bold statement on foreign policy that reaffirmed the nation’s longstanding commitment to neutrality and offered an explicit warning to Europe that the entire Western Hemisphere was closed to further colonization. This pronouncement of American autonomy and hemispheric solidarity against European aggression, which came to be known as the Monroe Doctrine, is considered one of the most significant statements in American foreign policy and the greatest achievement of Monroe’s two-term...

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Monroe Doctrine (National Archives and Records Administration)

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