On June 6, 1944, at the height of World War II, Allied forces invaded the beaches of Normandy in France in an event known as D-Day. Although the assault was a success, it came at a cost with thousands of Allied soldier losing their lives during the process. The largest amphibian assault to date, the invasion helped to pave the way for the Allies to win the war on the Western Front and is regarded as one of the biggest military operations in history. Think you know the details about this monumental day in history? Take this quiz to test your knowledge!