Calling All History Buffs – Ultimate WW2 Challenge! What was the codename for the Allied invasion of Normandy? Operation Overlord Operation Barbarossa Operation Market Garden Operation Torch None What was the largest concentration camp established by the Nazis during World War II? Dachau Buchenwald Auschwitz-Birkenau Treblinka None Who was the leader of Nazi Germany during World War II? Benito Mussolini Adolf Hitler Joseph Stalin Winston Churchill None What event led to the United States' entry into World War II? Invasion of Poland Bombing of Pearl Harbor Battle of Britain D-Day None Which country was not part of the Allies during World War II? United States Soviet Union Japan United Kingdom None Time's up Most Popular Most Popular
