Final answer:
The Roosevelt Corollary was an addition to the Monroe Doctrine that allowed the United States to intervene militarily in Latin American nations if their actions threatened stability in the region.
Step-by-step explanation:
The Roosevelt Corollary was an addition to the Monroe Doctrine that was articulated by President Theodore Roosevelt in 1904. It stated that the United States would use military force as an international police power to correct any chronic wrongdoing by any Latin American nation that might threaten stability in the region. Unlike the Monroe Doctrine, which proclaimed noninterference, the Roosevelt Corollary proclaimed the right and obligation of the United States to intervene in the affairs of Latin American nations.