 Mexico played a relatively minor role militarily in World War Two in terms of sending troops, but there were other opportunities for Mexico to contribute significantly.Relations between Mexico and the U.S. had been warming in the 1930s, particularly after U.S. President Franklin Delano Roosevelt implemented the Good Neighbor Policy toward Latin American countries.Even before the outbreak of hostilities between the Axis and Allied powers, Mexico aligned itself firmly with the United States, initially as a proponent of "belligerent neutrality" which the U.S. followed prior to the Pearl Harbor attack in December 1941.