Thomas Wilhelm, A Military Dictionary and Gazetteer
“ The medical department is governed by a director-general, who is a member of the War Office, and has charge of the surgical, medical, and sanitary arrangements of the army. In the United States every military post has at least one medical officer and sometimes two, as the nature of the climate or the strength of the command demands, all of whom are under the command of a surgeon-general, who ranks as brigadier-general, and is permanently established at Washington, D. C. He has full control over everything that pertains to the medical department of the army. ”
