"The WWII invasion of Allied troops into German-occupied Europe, known as D-Day, was the largest military endeavor in history. By the time it occurred on June 6, 1944, Hitler and the Axis powers had a chokehold grip on the European continent, which the Allies called "Fortress Europe." Behind enemy lines, Nazi Germany was engaged in the mass extermination of the Jewish people and the oppression of civilians across Europe. The goal of D-Day was no less...