The Roosevelt Corollary expanded upon the Monroe Doctrine by stating that the US had the right to intervene in Central and Latin American countries that were unable to pay foreign debts. This effectively allowed the US to exercise "international police power" in the Americas and counter European influence. Historians view the Corollary as transforming the Monroe Doctrine by justifying US intervention where it had previously only warned European powers against intervention. The Corollary would be used to justify several US military interventions in Latin American and Caribbean countries over the next 20 years.