 Nyora kupfuurira kweiyi ndima - Kutevera kudzorerwa kwechamhembe kwemahombekombePashure pokurwisana kweBuna, Gona naSanananda, vaAllies vakaenda kunorwisa muNew Guinea. PIB yakatora chikamu mukufambira mberi kuenda kuSalamaua muna 1943, isati yarwa pamwe neMarkham, Ramu, uye Sepik nzizi panguva yeRamu Valley Finisterre Range mushandirapamwe, uye paHuon peninsula, ichibatsira mukutora kweFinschhafen neSattelberg, uye ichitevera maJapan pavakadzokera kumashure kuchamhembe kwemahombekombe vakananga Saidor muna 19431944. Bhatani iri rakabviswa kwenguva pfupi kubva kumabasa kuti ridzorerwe muna 1944, uye pamwe chete neNew Guinea Infantry Battalions NGIBs idzo dzakazounganidzwa neAustralia Army, PIB yakaumbwa muPacific Islands Regiment PIR munaNovember 1944. Muna 1945, yakaendeswa kuBougainville uko makambani ebato akaendeswa kumativi ose kubva kuBonis kusvika kuBuin mumwedzi yekupedzisira yehondo. Kubudirira kwavo kwakanga kwakadaro zvokuti vaJapan vakataura nezvePIB seGreen Shadows nemhaka yekugona kwavo kupera uye kuoneka kubva musango zvisingatarisirwi, varwi vayo vachizivikanwa nokuda kwoutsinye hwavo nokutsungirira. Pashure pokuguma kwehondo battalion yakashandiswa kuchengeta vasungwa vehondo veJapan, isati yaputswa muna August 1946. Muna 1951, PIR yakagadziridzwa, ichitora mutsara wayo kubva kuPIB neNGIBs. 