Kenney sent home Major General Royce, Brigadier Generals Edwin S. Perrin, Albert Sneed and Martin Scanlon, and about forty colonels. In Australia he found two talented, recently arrived brigadier generals, Ennis Whitehead and Kenneth Walker. Kenney reorganised his command in August, appointing Whitehead as commander of the V Fighter Command and Walker as commander of the V Bomber Command. Allied Air Forces was composed of both USAAF and RAAF personnel, and Kenney moved to separate them. Brigadier General Donald Wilson arrived in September and replaced Air Vice Marshal Bostock as Kenney's chief of staff, while Bostock took over the newly created RAAF Command. Walker was shot down over Rabaul in January 1943. His successor, Brigadier General Howard Ramey, disappeared in March 1943.