After the spanish American war presidents began to back up the Monroe Doctrine with military strength because they wanted to protect Americans economic interest in Latin America. In the late 1800s Europeans and Americans invested large sums of money in Latin America
The Dominican Republic was unable to repay its European leaders and fearing the depts Roosevelt issued the Roosevelt Corollary to the Monroe Doctrine. By doing this the United States pledged to use armed forces to prevent the European country from seizing Dominican territory.
To ensure that the Europeans were repaid the United States took control of collecting all Dominican customs duties. The Roosevelt Corollary succeeded in bringing more stability to the region and keeping other nations out. On the other hand Americas willingness to use its police power made many Latin Americans uneasy.
During the presidency of William Taft the influence in Latin American deepened. Taft believed in advancing U,S interest in other countries through dollar diplomacy, a policy of promoting American economic interest in other countries and using that economic power to achieve American policy goals.
to reduce the chances of European interference the Taft administration followed that policy of using the U.S government to guarantee loans made to foreign countries by American business people. The policy was called the dollar diplomacy and if was often used to justify keeping European powers out of the Caribbean.
in 1913 Woodrow Wilson gave the Monroe Doctrine a moral tone. According to Wilsons missionary diplomacy the United States had a moral responsibility to deny recognition to any Latin American Government it viewed as oppressive.