 MacArthur announced the composition of his staff , known as General Headquarters ( GHQ ) on 19 April . Major General Richard K. Sutherland became Chief of Staff ; Brigadier General Richard J. Marshall , Deputy Chief of Staff ; Colonel Charles P. Stivers , Assistant Chief of Staff , G @-@ 1 ; Colonel Charles A. Willoughby , Assistant Chief of Staff , G @-@ 2 ; Brigadier General Stephen J. Chamberlin , Assistant Chief of Staff , G @-@ 3 ; Colonel Lester J. Whitlock , Assistant Chief of Staff , G @-@ 4 ; Brigadier General Spencer B. Akin , Signal Officer ; Brigadier General Hugh J. Casey , Engineer Officer ; Brigadier General William F. <unk> , Antiaircraft Officer ; Colonel Burdette M. Fitch , Adjutant General ; and Colonel <unk> A. Diller , Public Relations Officer . 
