The Australian contribution to the Battle of Normandy involved more than 3,000 military personnel serving under British command. The majority of these personnel were members of the Royal Australian Air Force (RAAF), though smaller numbers of Australians serving with the Royal Navy and British Army also participated in the fighting prior to and after the Allied landings on 6 June 1944. While all the RAAF units based in the United Kingdom (UK) took part in the battle, Australians made up only a small portion of the Allied force.
The Australians who supported the D-Day invasion included between 2,000 and 2,500 RAAF airmen in Australian squadrons and British Royal Air Force units, and approximately 500 members of the Royal Australian Navy serving on Royal Navy vessels, as well as a small number of Australian Army officers and merchant seamen. The army personnel and thousands of Australian airmen also took part in the subsequent Battle of Normandy between June and August 1944, and an RAAF fighter squadron operated from airfields in Normandy. Throughout the campaign, Australian airmen provided direct support to the Allied ground forces by attacking German military units and their supply lines, as well as forming part of the force that defended the beachhead from air attack and manning transport aircraft. Australians also indirectly supported the campaign by attacking German submarines and ships that threatened the invasion force. The 13 Australian Army officers who took part in the campaign filled a variety of roles in British units in order to gain experience that they could take back to Australia.
Australian personnel also took part in the invasion of Southern France in August 1944, and RAAF airmen continued to operate against German forces until the end of the war in May 1945. However, the relatively low casualties suffered by the Allied air forces during the fighting in Normandy and subsequent campaigns resulted in an over-supply of trained Australian aircrew in the UK, hundreds of whom were never assigned to a combat role. Australia's contribution to the fighting in Normandy is commemorated in memorials and cemeteries in London and Normandy.