sentences:  After World War II began, a majority of Americans supported defending the entire Western Hemisphere against foreign invasion.A 1940 national survey found that 81% supported defending Canada; 75% Mexico and Central America; 69% South America; 66% West Indies; and 59% Greenland.The December 1941 conquest of Saint Pierre and Miquelon by the forces of Free France from out of the control of Vichy France was seen as a violation of the Monroe Doctrine by Secretary of State Cordell Hull.