The success of the Allied invasion of Normandy, France, on June 6, 1944 is often taken for granted today, generations removed from the event known as D-Day. At the time, however, the outcome of this complex attack was far from certain. As the largest invasion force in history assembled in Great Britain over many months, the Allies worked hard to conceal the true nature of their strategy. These efforts included many brilliant deceptions and feints that fooled the Nazis. Meanwhile, the Allies worked overtime building ingenious new assault vehicles specially prepared for the dangerous beach landing. In the end, the success came at a terrible price; according to the National D-Day Memorial Foundation, more than 4,000 Allied troops died as a result of D-Day, and almost 6,000 more were wounded. Here are some facets of the Normandy invasion that are often overlooked today, shrouded by the fog of time.