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By the mid-1800s, Monroe’s declaration, combined with ideas of Manifest Destiny, provided precedent and support for U.S. expansion on the American continent. In the late 1800s, U.S. economic and military power enabled it to enforce the Monroe Doctrine. The doctrine’s greatest extension came with Theodore Roosevelt’s Corollary, which inverted the original meaning of the doctrine and came to justify unilateral U.S. intervention in Latin America.

====The Roosevelt Corollary expands on US imperialism in Latin America====

[[File:682px-President_Theodore_Roosevelt,_1904.jpg|thumbnail|left|250px|President Theodore Roosevelt in 1904]]