 Lord Birdwood, who commanded the Australian Imperial Force in the First World War, was appointed to honorary five-star rank in the Australian Military Forces on his promotion to field marshal in the British Army in 1925.King George VI and Prince Philip, Duke of Edinburgh have held all three Australian five-star ranks in an honorary capacity, and have been the only holders of the Australian ranks of admiral of the fleet and marshal of the RAAF.Five-star ranks in Brazil are only used in wartime.