In 1943–1944, the battalion fought in New Guinea, conducting an amphibious landing as part of operations to capture Lae in early September at the end of the Salamaua–Lae campaign, before participating in the follow-up landing on the Huon Peninsula as Japanese forces withdrew inland from Lae. In early 1944, the battalion was withdrawn to Australia for rest and reorganisation and a long period of inactivity followed before it returned to combat. Its final campaign came late in the war when it was committed to the fighting in Borneo in June 1945, landing on Brunei. Following the end of the war, the battalion was disbanded in early 1946.