From mainland New Guinea, some civilians and individual officers from the Australian New Guinea Administrative Unit organised unofficial rescue missions to New Britain, and between March and May about 450 troops and civilians were evacuated by sea.
Dari daratan utama Papua Nugini, beberapa penduduk sipil dan perwira-perwira melakukan misi-misi penyelamatan tidak resmi ke Britania Baru, dan antara bulan Maret dan Mei sekitar 450 tentara dan warga sipil diungsikan lewat laut.