Sextus Iulius Frontinus, vir consularis de re militari

If the Militaris Disciplina art of war, which ought to excel above all other arts and has accomplished the greatest deeds—which was employed by Alexander the Macedonian, by the Romans especially, by Hanno, and by others disciplined in warfare long ago, and by the Romans in particular, who earned their empires for you no less by arms than by counsel and prudence—and by Iulius Frontinus, who edited these illustrious volumes, and by Vegetius, and by Aelianus, and by Modestus, who wrote about military matters, and which has been spread throughout the whole world and among all peoples... The text repeats a phrase multiple times due to a printing error in the original manuscript.

Sextus Iulius Frontinus, a man of consular rank, on military matters.

Flavius Vegetius, an illustrious man, on military matters.

Aelianus on the formation of battle lines.

Modestus's short book on military terminology.