33 points Franklin Delano Roosevelt helped get America out of the depression by giving people hope that the country could turn itself around. During this time, America practiced a policy of isolationism, totally uninterested in another European war that seemed looming. In Europe, the leaders of some countries were instilling hope in their populaces by blaming foreigners for their countries' woes. The National Socialist (Nazi) Party of Adolf Hitler was starting its intended take over, but it would take a direct attack on American soil before the United States joined World War II. America continued to stay out of the war as Hitler invaded Poland, Denmark, Norway, Belgium, the Netherlands and France. In 1941, with the Axis now in control of most of Europe, German submarines (U-boats) torpedoed two American destroyers, killing more than a hundred Americans. America was then on the brink of joining the war. Which of the following events sparked the end of America's isolationist policy? German U-boats attacked American ships, killing over one hundred Americans. In 1941, the Axis took control of most of Europe. ,