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Publius Flavius Vegetius Renatus, commonly referred to simply as Vegetius, was a writer of the Later Roman Empire. Nothing is known of his life or station beyond what he tells us in his two surviving works: Epitoma rei militaris (also referred to as De Re Militari), and the lesser-known Digesta Artis Mulomedicinae, a guide to veterinary medicine.

The latest event alluded to in his Epitoma rei militaris is the death of the Emperor Gratian (383); the earliest attestation of this work is a subscriptio by one Flavius Eutropius, writing in Constantinople in the year 450, which appears in one of two families of manuscripts, suggesting that a bifurcation of the manuscript tradition had already occurred. Despite Eutropius' location in Constantinople, the scholarly consensus is that Vegetius wrote in the Western Empire. Vegetius dedicates his work to the reigning emperor, who is identified as Theodosius, ad Theodosium imperatorem, in the manuscript family that was not edited in 450; the identity is disputed: some scholars identify him with Theodosius the Great,[1] while others follow Otto Seeck[2] and identify him with the later Valentinian III, dating the work 430-35.[3]

Epitoma rei militaris

Main article: De Re Militari

Vegetius' epitome mainly focuses on military organization and how to react to certain occasions in war. Vegetius explains how one should fortify and organize a camp, how to train troops, how to handle undisciplined troops, how to handle a battle engagement, how to march, formation gauge, and many other useful methods of promoting organization and valour in the legion.

As G. R. Watson observes, Vegetius' Epitoma "is the only ancient manual of Roman military institutions to have survived intact". Despite this, Watson doubts its value, for Vegetius "was neither a historian nor a soldier: his work is a compilation carelessly constructed from material of all ages, a congeries of inconsistencies".[4] These antiquarian sources, according to his own statement, were Cato the Elder, Cornelius Celsus, Frontinus, Paternus and the imperial constitutions of Augustus, Trajan, and Hadrian (1.8).

The first book is a plea for army reform; it vividly portrays the military decadence of the Late Roman Empire. Vegetius also describes in detail the organisation training and equipment of the army of the early Empire. The third book contains a series of military maxims, which were (appropriately enough, considering the similarity in the military conditions of the two ages) the foundation of military learning for every European commander from William the Silent to Frederick the Great.

His book on siege-craft contains the best description of Late Empire and Medieval siege machines. Among other things, it shows details of the siege engine called the onager, which afterwards played a great part in sieges, until the development of modern cannonry. The fifth book gives an account of the materiel and personnel of the Roman navy.

The author of the 1911 Encyclopaedia Britannica article states that "In manuscript, Vegetius' work had a great vogue from its first advent. Its rules of siegecraft were much studied in the Middle Ages." N.P. Milner observes that it was "one of the most popular Latin technical works from Antiquity, rivalling the elder Pliny's Natural History in the number of surviving copies dating from before AD 1300."[5] It was translated into English, French (by Jean de Meun and others), Italian (by the Florentine judge Bono Giamboni and others), Catalan, Spanish, Czech, and Yiddish before the invention of printing. The first printed editions are ascribed to Utrecht (1473), Cologne (1476), Paris (1478), Rome (in Veteres de re mil. scriptores, 1487), and Pisa (1488). A German translation by Ludwig Hohenwang appeared at Ulm in 1475.

However, from that point Vegetius' position as the premier military authority began to decline, as ancient historians such as Polybius became available. Niccolò Machiavelli attempted to address Vegetius' defects in his L'arte della Guerra (Florence, 1521), with heavy use of Polybius, Frontinus and Livy, but Justus Lipsius' accusation that he confused the institutions of diverse periods of the Roman Empire and G. Stewechius' opinion that the survival of Vegetius' work led to the loss of his named sources were more typical of the late Renaissance.[6] While as late as the 18th century a soldier such as Marshal Puysegur based his own works on this acknowledged model, in Milner's words, Vegetius' work suffered "a long period of deepening neglect".[7]

Vegetius emphasizes the shortcomings of the Roman Army in his lifetime. In order to do this he eulogises the Army of the early Empire. In particular he stresses the high standard of the legionaries and the excellence of the training and the officer corps. In reality, Vegetius probably describes an ideal rather than the reality. The army of the early Empire was a formidable fighting force but it probably was not in its entirety quite as good as Vegetius describes. In particular, the five foot ten inches minimum height limit identified by Vegetius would have excluded the majority of the men in Roman times (the Roman foot was less than the English foot, at 11.65 inches; hence, 5'10" Roman is 5' 7.5" in modern terms, which is just above average height of Roman (Italian) men of the time from skeletal evidence from Herculaneum in 79 A.D.). The emperor Valentinian (364-375) lowered the height limit to 5' 7" Roman which equals 5.5 inches. Despite the romanticism extolling the idealized virtues of the Roman legion of an earlier time, Vegetius' De Re Militari remains a reliable and useful insight into the success of the early Roman Empire.

In Popular Culture

Vegetius is among other ancient historians and personalities, particularly Roman and Greek historical figures, quoted during pre-battle loading periods in Rome: Total War.




  • An English translation of Vegetius, with introduction, was recently published by Liverpool University Press:
  • Vegetius: Epitome of Military Science. Trans. N.P. Milner. Liverpool: Liverpool University Press, 1993 and 1996.
  • A translation in Dutch was published by Fik Meijer, entitled: Vegetius, 'Het Romeinse leger' ('The Roman Army' (Polak/Van gennep Publishers, Amsterdam, 2004)

External links

The complete Latin text of De Re Militari is available online:

  • The Latin Library
  • IntraText

A partial English translation of De Re Militari by Lieutenant John Clarke (1767) is available online

  • The Military Institutions of the Romans (De Re Militari)
  • The Military Institutions of the Romans (De Re Militari)
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