Following further attacks in March against Japanese camps around Pommern Bay and Rempi village, the Vengeance was withdrawn from front-line operational service in New Guinea, as Allied commanders deemed its short flying range unsuitable for the conditions. As a result, No. 21 Squadron returned to Australia on 13 March 1944. Moving to Camden, New South Wales, and then Leyburn, Queensland, the squadron converted to Consolidated B-24 Liberator heavy bombers in June 1944. Conversion training took six months and as a result, the unit did not see operational service again until 11 January 1945, when, as part of No. 82 Wing RAAF, it attacked targets at Laga and a radio station at Moena Island, operating out of Fenton. During January and February more than a hundred missions were flown against Japanese targets. On 6 April, near Koepang, along with Liberators from No. 24 Squadron, the squadron attacked a convoy of ships including the cruiser "Isuzu". The attack proved unsuccessful. Other targets attacked included troop areas at Tawo and fuel tanks in Tarakan and Borneo. From July, while the main force remained at Fenton, the squadron sent a detachment to Morotai Island. In the final months of the war the squadron's last operations were concentrated around supporting the Allied landings at Labuan and Balikpapan.