Revealing the factors that made Omaha Beach a nightmare for the Americans; the place where history's largest amphibious invasion nearly failed.

Shortly after D-Day, the Allied advance stalls, with the fields around Hill 112 on the outskirts of Caen becoming a graveyard for British soldiers in Normandy.

In the grip of winter, the Germans launch a blistering attack on the Allies barely defended frontline in the Ardennes.