During the World War II, isolationists believed that a country's safety was more important than foreign war. With the Neutrality Acts and the America First Committee, many Americans had isolationist sentiments. A great dilemma faced the Americans concerning the US's role in World War II, which forced the country into a great depression. The great depression prompted the Congress to sign Neutrality Acts to ban international trade with warring nations. Japanese also needed natural resources, and to expand in the Pacific, including Japan. As result, Japanese attacked Pearl Harbor in the US. Therefore, Japanese are liable for the war between Japan and America. To some extent, President Roosevelt is to lame for moving the US Pacific Fleet from California to Pearl Harbor, which threatened Japanese.