World War II was the most destructive war in history. Millions upon millions of people died, including innocent civilians. Both sidesÑthe Allies and Axis PowersÑpursued secret plans, tactics, and weapons to destroy each other resulting in horrors on a scale never before seen. Secrets of World War II reveals little-known stories of the people, weapons, and battles that have affected the maps on our walls and the allegiances in our hearts.