Almost 160,000 Allied troops landed at Normandy on June 6, 1944, in a massive operation designed to break through heavily fortified German defenses and begin the liberation of Western Europe.
Did you know that theatre set designers played a role in D-Day's success? Or that MI5 were worried the whole plan could be brought down by the Daily Telegraph's crossword? Here are some fascinating facts you didn't know about the invasion that changed the course of the Second World War.