The 10th Battery deployed to New Guinea in July, initially with a view to provide support during the advance through the Markham Valley; however, the lack of Japanese armour meant they remained around Port Moresby and were used in a defensive role, and undertook manual labour until returning to Australia in April 1944. Meanwhile, in September 1943, the 11th Battery was detached for the landing at Lae, supporting the 9th Division. Later, it deployed to support the 20th Brigade around Scarlet Beach during operations to secure Finschaffen, manning defensive positions along the beach, before returning to Australia in March 1944. In May 1944, the regiment was reconstituted, with the 10th and 11th Batteries rejoining regimental headquarters at Mapee, Queensland; in August, they moved to Wongabel. The 12th Battery returned to the regiment in September 1944, when the 6th Division deployed to Aitape–Wewak where there was no need for anti-tank support.