De re militari
De re militari, qui etiam nuncupatur Epitoma rei militaris, est nomen libri a Flavio Vegetio Renato de rebus militaribus scripti.

Fontes
Flavius Vegetius Renatus, Epitome Rei Militaris, The Latin Library, Ad Fontes Academy. 
Lieutenant John Clark (translator); unknown editor (2001), The Military Institutions of the Romans (De Re Militari) , Digital Attic 2.0. Brevik, Mads. Books I-III only.

Libri de re militari
Litterae Latinae aetatis Imperii