 The April 1942 reorganisation that created the Allied Land Forces and Allied Naval Forces also created the Allied Air Forces under Brett . Unlike MacArthur , Brett created a completely integrated headquarters , with a Royal Australian Air Force ( RAAF ) officer , Air Vice Marshal William Bostock , as his chief of staff . Each United States Army Air Forces ( USAAF ) staff officer was paired with a RAAF officer , with the senior staff posts divided evenly between them . A majority of command positions were held by Australians . To make up shortages of USAAF aircrew , RAAF aircrew were assigned to USAAF air groups , serving in every role except aircraft commander . 
