On D-Day, the Allies invaded Nazi-occupied France. The invasion, involving more than 150,000 Allied troops, it was the biggest undertaking in the history of Western civilisation. The invasion was centred on five beaches, codenamed for the occasion. American forces were to land on Omaha and Utah beaches, the Canadians on Juno, and the British on Sword and Gold. Almost half of the total troops were British, and among them were the 800 men of the 1st Dorset Regiment. They landed on Gold Beach at around 7.25am on 6 June 1944. Sixty years later, Time Team went to Normandy to try to recreate the story of their 'longest day'.