quality:correction, structural:reformatting, structural:scholar_edition, structural:summarization
The 1930s were a high point of isolationism in the United States. The key foreign policy initiative of Roosevelt's first term was the Good Neighbor Policy, in which the U.S. took a non-interventionist stance in Latin American affairs. Foreign policy issues came to the fore in the late 1930s, as Nazi Germany, Japan, and Italy took aggressive actions against other countries. In response to fears that the United States would be drawn into foreign conflicts, Congress passed the Neutrality Acts, a series of laws that prevented trade with belligerents. After Japan invaded China and Germany invaded Poland, Roosevelt provided aid to China, Britain, and France, but public opinion opposed use of the military. After the Fall of France in June 1940, Roosevelt increased aid to the British and began a very rapid buildup of air power. In the 1940 presidential election, Roosevelt defeated Republican Wendell Willkie, an internationalist who largely refrained from criticizing Roosevelt's foreign policy.