On the night of 5/6 June Bomber Command conducted precision attacks on ten German coastal artillery batteries near the beaches where Allied troops were to land. Each battery was targeted by approximately 100 heavy bombers, and all four Australian heavy bomber squadrons took part in the operation. No. 460 Squadron dispatched 26 aircraft, which were evenly split between attacking the batteries at Fontenay-Crisbecq and St Martin de Varreville. No. 466 Squadron provided 13 aircraft to the raid on batteries at Merville-Franceville Maisy, 14 aircraft from No. 463 Squadron struck Pointe du Hoe and No. 467 Squadron dispatched 14 against batteries at Ouistreham. The RAAF squadrons did not suffer any losses. Many Australian aircrew posted to British units also participated in this attack, and 14.8 percent of the 1,136 Bomber Command aircraft despatched were either part of RAAF squadrons or were flown by Australians.
Australians posted to RAF units also landed paratroopers in Normandy and took part in diversionary operations. On the night of 5/6 June several Australian airmen served in heavy bombers that dropped “window” chaff in patterns that, on German radar, simulated the appearance of convoys headed for the Pas de Calais region of France. Other Australians served in aircraft that dropped dummy paratroopers and jammed German radar. One Australian pilot posted to No. 139 Squadron RAF took part in “intruder” bombing raids against targets in western Germany and the Low Countries that sought to divert German aircraft away from Normandy. Australian aircrew also served aboard the transport aircraft of No. 38 Group RAF and No. 46 Group RAF, which flew the British 6th Airborne Division from the UK to Normandy on the night of 5/6 June. About 14 percent of the transport aircraft in No. 38 Group were piloted by Australians, though the proportion of Australians in No. 46 Group was much lower. There were no completely Australian aircrews in either group.
Australian aircrew supported the fighting on 6 June. No. 453 Squadron was one of 36 Allied squadrons that provided low-altitude air defence for the invasion fleet and landing force. Many of the squadron’s pilots flew several sorties during the day, though they did not encounter any German aircraft. No. 456 Squadron also formed part of the force that provided air defence for the invasion area at night. In addition, about 200 Australian pilots were spread across the dozens of RAF fighter and fighter-bomber units that supported the landings. A small number of Australian aircrew also served in RAF reconnaissance units and 2TAF’s light bomber squadrons, which also saw combat over France on D-Day. The three Australian squadrons assigned to Coastal Command flew only a small number of sorties on 6 June as few German submarines or E-boats put to sea.
About 500 RAN personnel served on board RN ships involved in the operation. While most formed part of the crew of RN warships, several Australian officers led flotillas of landing craft and others commanded individual craft. For instance, Sub-Lieutenant Dean Murray commanded a force of six RN Landing Craft Assault that landed soldiers of the British 3rd Infantry Division at Sword Beach. Hudspeth also took X20 across the channel to mark the edge of Juno Beach during the landings there; he received his third DSC for completing this mission. Some of the warships with Australian crew members that supported the landings were HMS Ajax (which had three RANVR officers on board), Ashanti, Enterprise, Eskimo, Glasgow, Mackay and Scylla. Australian members of the Merchant Navy also participated in the D-Day landings, though the number of sailors involved is not known.
Few of the Australian Army officers attached to British units landed on D-Day. Major Jo Gullett, who was the second in command of an infantry company in the 7th Battalion, Green Howards, came ashore on Gold Beach as part of the invasion force. In his memoirs, Gullett described the landing as “easily the most impressive occasion of my life”. He subsequently led a company of the Royal Scots until he was wounded by German machine gun fire on 17 July. Most of the other Australian officers served in staff positions; for instance Lieutenant Colonel Bill Robertson was the chief of staff of the 51st (Highland) Infantry Division when that unit arrived in Normandy and was later posted to the 50th (Northumbrian) Infantry Division where he served in the same role. Vincent came ashore on 7 June and served with XXX Corps, 7th Armoured and 43rd (Wessex) Infantry Divisions during the campaign.
Due to the lack of a nominal roll or other records listing the Australians who took part in the D-Day landings, it is not possible to determine the exact number involved. However, it has been estimated that about 3,000 Australian military personnel and merchant seamen participated in the operation. The total number of Australians killed on 6 June was 14, of whom 12 were RAAF airmen and two were members of the RAN.