 Though Liman intended to film the beach battle on location, the studio instead had a beach set built at the studio site.The set was surrounded by chroma key green screens, which the visual effects artists later used to extend the beach with plates shot at Saunton Sands in North Devon.It was intended for the battle scenes to be reminiscent of coastal battles during World War II such as the Invasion of Normandy and the Battle of Dunkirk.