Few events in human history match the significance and far-reaching effects of World War II. The actions of the Allied nations helped stop the tide of Nazi aggression but ushered in the Cold War. The materials found on this Web site were developed to provide a thorough understanding of the Soviet regime during the war, the conferences that would shape the postwar world, and the human impact of the war. With an extensive list of primary source documents, secondary resources, interactive maps, video clips, and images, the World War II Behind Closed Doors Web site provides a wide range of educational resources for United States History and World History classrooms.