 They remained in the Northern Territory until 1944 when the 13th Brigade was transferred to the 5th Division, and proceeded overseas to take part in the New Britain campaign against the Japanese, remaining on the island until the end of the war; combat was limited during the campaign, though, as the Australians sought mainly to isolate the Japanese garrison, rather than destroy it.After arriving at Jacquinot Bay in November 1944, the brigade moved to Wunung Plantation and then moved to Palmalal Plantation in January 1945.They took part in the limited advance from the Tol Plantation and conducted patrol operations as the Australians advanced slowly towards Rabaul.