By the Constitution of Constantine the supreme military command was given to a “Magister equitum” and a “Magister peditum.” Under them were a number of “Duces” and “Comites,” Dukes and Counts, with territorial titles.
Editorial footnote · Ecclesiastical History, Chapter XIV.—Of Artemius the Duke. Of Publia the Deaconess and her divine boldness.; original source section: Chapter 14, editorial note cite_note-1 · Original source