The Monroe Doctrine stated that any form of European intervention in the American continent would be viewed as a form of aggression and it would require the intervention of the United States.
The Roosevelt Corollary was coined to justify the military intervention of the United States in Latin America in protection of the former's economic interests. Latin Americans resented this unilateral claim of authority, and in 1907 the Drago Doctrine was incorporated into international law. Coined by the Argentinian Luis Drago, it prohibited armed interventions of any county to any country to collect debts.
