As president, Hoover largely made good on his pledge made prior to assuming office not to interfere in Latin America's internal affairs. In 1930, he released the Clark Memorandum, a rejection of the Roosevelt Corollary and a move towards non-interventionism in Latin America. Hoover did not completely refrain from the use of the military in Latin American affairs; he thrice threatened intervention in the Dominican Republic, and he sent warships to El Salvador to support the government against a left-wing revolution. But he wound down the Banana Wars, ending the occupation of Nicaragua and nearly bringing an end to the occupation of Haiti. Franklin Roosevelt's Good Neighbor policy would continue the trend towards non-interventionism in Latin America.