1. praefectus alicujus and alicui: praepositus alicui. qui alicui praeest or praepositus est (general term): dux (of an army or a division): dux summus: imperator (commander-in-chief): belli or exercitus dux, or from the context dux. ductor only (any commander in war; duct, however not in plain prose), bello praepositus: commander of the horse, magister equitum (the proper word in the Roman army): of the fleet, praefectus classis: to be commander-in-chief, [Vid: “to have the chief command.” under COMMAND]: dux, praefectus classis (admiral): praetor (commander of troops, not Romans, especially of land-troops, στρατηγός, often used by Nep., Vid: commentators on Milt., 4, 4): praefectus equitum (general term, while magister equitum refers to the Roman horse only): to be commander of the horse, equitatui praeesse: commander of the infantry, copiarum pedestrium dux: to be, copiis pedestribus, or simply copiis praeesse: commander of the artillery, perhaps *praefectus rei tormentariae summus: to be elected commander, chosen commander-in-chief, ducem deligi ad bellum gerendum: the valour of a commander, virtus imperatoria: talents for a future commander, indoles imperatoriae virtutis (Justinianus, 2, 8, 15): the experience of a commander, rei militaris peritia.