Monroe Doctrine

Definition

The Monroe Doctrine was a policy introduced by President James Monroe in 1823 that stated any European colonization or intervention in the Americas would be seen as an act of aggression towards the United States.

Related terms

Manifest Destiny: The belief that it was America's destiny to expand its territory from coast to coast.

Imperialism: The policy of extending a country's power and influence through diplomacy or military force.

Sphere of Influence: A region where one country has significant economic, political, or cultural influence over another country.