http://facweb.furman.edu/~dmorgan/lexicon/silva.htm wrote:.off admiral / praefectus classis; admiralis+ [Latham]; pontarchus* [s.15] (HELF.) ]] classis imperator (LRL) ]] classis praefectus, classi praepositus; -ty curatores rei navalis; (department) totum officium maritimum (LEV.) ]] thalassiarchus (Milton)
.off admiral: vice-admiral / classis praefectus secundus (LEV.)
.off batallion / batalio* [s.18] (HELF.) ]] cohors; phalanx (LEV.)
.off brigade (mil.) / cohors; (group) manus; caterva, turma (LEV.)
.off brigadier-general / cohortium praefectus [Latinitas] (HELF.) ]] cohortium praefectus (LRL) ]] dux cohortis (LEV.)
.off cadet (mil.) / contubernalis (LEV.)
.off captain (mil.) / Hauptmann: centurio, onis m.; capitaneus+ [Soc. Lat.] (HELF.) ]] centurio (LRL) ]] centurio (LEV.) ]] capitaneus+ (Milton)
.off chief of staff / imperator (LEV.)
.off colonel / tribunus militum, chiliarchus (LRL)
.off company (mil.) / centuria [Varro] (HELF.) ]] manipulus; cohors (LEV.)
.off corporal (mil.) / cornicularius (LEV.)
.off division (mil.) / divisio (HELF.)
.off field marshal / campi marescallus+ [s.17] (HELF.) ]] imperator (LEV.)
.off general (of army) / summus (v. generalis) praefectus (militiae) (LRL)
.off liaison officer / internuntius (LEV.)
.off lieutenant / succenturio maior (LRL)
.off lieutenant: first lieutenant / Oberleutnant: locumtenens superior [Bauer] (HELF.)
.off lieutenant: second lieutenant / Leutnant: locumtenens, entis m. [Latham] (HELF.)
.off lieutenant-colonel / Oberstleutnant: colonellus+ locumtenens [Bauer] (HELF.) ]] tribunus militum vicarius (LRL)
.off lieutenant-commander / Kapitänleutnant: capitanei locumtenens (HELF.)
.off major (mil.) / centurio maior [Latinitas] (HELF.) ]] legatus, praefectus maior (LEV.)
.off marshal (mil.) / marescallus+ [DuCange] (HELF.) ]] dux, imperator (LEV.)
.off naval commander / navarchus (LRL)
.off non-commissioned officer, sargent / Unteroffizier: subpraefectus* [Hederich, lexica, s.18]; subofficiarius* [Soc. Lat.] (HELF.)
.off officer / Offizier: praefectus militum; officiarius+ (HELF.)
.off private (mil.) / miles gregarius (LEV.)
.off private first class / Obergefreiter: exemptus superior [Soc. Lat.] (HELF.)
.off regiment / regimentum* [Kirsch] (HELF.) ]] legio; -al legionarius (LEV.)
.off sergeant / Feldwebel: optio, onis m. [Varro] -- Wachtmeister: praefectus excubiarum [s.17]; vigilum praefectus [Pl. 22, 96] (HELF.) ]] decurio (LRL) ]] optio; cornicularius (LEV.)
.off sergeant-major / Hauptfeldwebel: optio primarius [Soc. Lat.] (HELF.)
.off squad / manipulus (LEV.)