Battleships in World War II part of Operation Neptune, in support of the D-Day landings in June 1944. D-Day also saw the deliberate sacrifice of two old dreadnoughts ( and ), which were scuttled as part of the breakwater around the Allied Mulberry harbours. The sinking of "Prince of Wales" and "Repulse" off the coast of Malaya in 1941 demonstrated that even the most modern battleships could not hold off aerial attacks without decent aerial defenses. The British HACS fire control system had been rendered inoperable by the extreme heat and humidity of the Malaya tropical climate, and the anti-aircraft artillery had managed to shoot
D-Day the Sixth of June at the Long Beach Naval Shipyard whilst the beach landing was made at Point Dume California. Before the days of computer-generated imagery director Henry Koster had to make his landing look convincing on his limited budget with two LCVPs and eighty soldiers. In the invasion scene soldiers running out of the two landing craft appear in front of a back projection scene of another take of the same scene giving the appearance of twice as many landing craft and soldiers as there actually were. Unlike many American war films "D-Day the Sixth of June" presents the viewpoints of British characters