World events after 1939 drew the United States into greater international involvement. These events forced the United States to abandon its isolationist foreign policy in favor of more active global involvement. The need for military security and the protection of democratic ideals have shaped American foreign policy since 1939. The need for military security has shaped the American foreign policy since 1939. Franklin D. Roosevelt believed the attack on pearl harbor justified the United States to officially declare …showed first 75 words of 452 total…

…showed last 75 words of 452 total…States protection of democratic ideals and this has shaped the American foreign policy since 1939. Since 1939 many world events have drawn the United States into greater international involvement. The old foreign policy of isolationism had to be dismissed and the new policy of containment was used so that the United States was more active in global involvement. The need for military security and protection of democratic ideals have shaped the American foreign policy since 1939 through containment.