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
The D-Day Story in D-Day and the Battle of Normandy. The embroidery took five years to complete and measures long. Film clips of veterans talking about their experiences give visitors further insight into what took place. The museum is run by Portsmouth Museum Services, a branch of Portsmouth City Council, and is supported by Portsmouth D-Day Museum Trust, a registered charity. The museum closed in March 2017 to undergo a £5 million refurbishment and allow for conservation work on exhibits. New exhibits include the "pencil that started the invasion" – the pencil used by Lt. Cdr. John Harmer to sign the order for