a unilateral declaration that the united states was the policeman of the western hemisphere was the
Monroe Doctrine The Roosevelt Corollary was invoked to intervene militarily in Latin America to stop the spread of European influence.[32] It was the most significant amendment to the original doctrine and was widely opposed by critics, who argued that the Monroe Doctrine was originally meant to stop European influence in the Americas.[3] They argued that the Corollary simply asserted U.S. domination in that area, effectively making them a "hemispheric policeman."[34]