While other elements of the 6th Division were sent to New Guinea in late 1942 and early 1943 and saw combat against the Japanese along the Kokoda Track and around Wau, the 19th Brigade was allocated to defensive duties in Darwin, Northern Territory. Thus, after a fortnight's leave, the 2/4th Battalion, which had been temporarily headquartered around Mount Lofty in South Australia, was ordered north in late May 1942. They remained there until June 1943, when the battalion was moved to northern Queensland, along with the rest of the 19th Brigade, aboard , as the 6th Division's other two brigades – the 16th and 17th – returned to Australia from New Guinea. As the division was brought back up to strength, a long period of training followed. Consequently, it was not until late in the war that the 2/4th was committed to its first, and only, campaign against the Japanese, deploying to Aitape–Wewak in November 1944, aboard the US transport "City of Mexico", as the Australians took over from US forces in the region.