But the key part of winning WW II was the invasion of France, hence the planning of the greatest sea and air invasion in history: Operation Overlord. Written and Hosted by Colin D. Heaton.

Here's what we know about the naming behind D-Day, and why that name was the one that stuck in the history books. The plans for the invasion at Normandy were known as Operation Overlord ...

Winston Churchill said that Operation Overlord was 'undoubtedly the ... that will forever be known as D-Day, and then track their hard fought campaign to liberate Paris.

THE PLANNING OF OPERATION BOLERO BEGAN AS PART OF THE PREPARATION FOR OPERATION OVERLORD, WHICH CULMINATED IN THE D-DAY INVASION OFF THE COAST OF FRANCE TWO YEARS LATER. BOLERO WAS THE CODENAME ...