De Re Militari


                    By Flavius Vegetius Renatus

                    Translated from the Latin by Lieutenant John Clarke

                    Text written in 390 A.D. British translation published in 1767

                    Copyright Expired

                    Etext version by Mads Brevik (2001).

Link to entire text
 

Excerpts from Book I


THE ROMAN DISCIPLINE THE CAUSE OF THEIR GREATNESS

                     Victory in war does not depend entirely upon numbers or mere courage; only skill and
                     discipline will insure it. We find that the Romans owed the conquest of the world to no
                     other cause than continual military training, exact observance of discipline in their
                     camps and unwearied cultivation of the other arts of war. Without these, what chance
                     would the inconsiderable numbers of the Roman armies have had against the
                     multitudes of the Gauls? Or with what success would their small size have been opposed
                     to the prodigious stature of the Germans? The Spaniards surpassed us not only in
                     numbers, but in physical strength. We were always inferior to the Africans in wealth and
                     unequal to them in deception and stratagem. And the Greeks, indisputably, were far
                     superior to us in skill in arts and all kinds of knowledge.

                     But to all these advantages the Romans opposed unusual care in the choice of their
                     levies and in their military training. They thoroughly understood the importance of
                     hardening them by continual practice, and of training them to every maneuver that
                     might happen in the line and in action. Nor were they less strict in punishing idleness
                     and sloth. The courage of a soldier is heightened by his knowledge of his profession,
                     and he only wants an opportunity to execute what he is convinced he has been perfectly
                     taught. A handful of men, inured to war, proceed to certain victory, while on the contrary
                     numerous armies of raw and undisciplined troops are but multitudes of men dragged to
                     slaughter.

THE DRILL CALLED ARMATURA

                     The new levies also should be taught by the masters at arms the system of drill called
                     armatura, as it is still partly kept up among us. Experience even at this time convinces
                     us that soldiers, perfect therein, are of the most service in engagements. And they
                     afford certain proofs of the importance and effects of discipline in the difference we see
                     between those properly trained in this branch of drill and the other troops. The old
                     Romans were so conscious of its usefulness that they rewarded the masters at arms
                     with a double allowance of provision. The soldiers who were backward in this drill were
                     punished by having their allowance in barley. Nor did they receive it as usual, in wheat,
                     until they had, in the presence of the prefect, tribunes, or other principal officers of the
                     legion, showed sufficient proofs of their knowledge of every part of their study.

                     No state can either be happy or secure that is remiss and negligent in the discipline of
                     its troops. For it is not profusion of riches or excess of luxury that can influence our
                     enemies to court or respect us. This can only be effected by the terror of our arms. It is
                     an observation of Cato that. misconduct in the common affairs of life may be retrieved,
                     but that it is quite otherwise in war, where errors are fatal and without remedy, and are
                     followed by immediate punishment. For the consequences of engaging an enemy,
                     without skill or courage, is that part of the army is left on the field of battle, and those
                     who remain receive such an impression from their defeat that they dare not afterwards
                     look the enemy in the face.

Excerpts from Book III


CARE TO PROVIDE FORAGE AND PROVISIONS

                     Famine makes greater havoc in an army than the enemy, and is more terrible than the
                     sword. Time and opportunity may help to retrieve other misfortunes, but where forage
                     and provisions have not been carefully provided, the evil is without remedy. The main
                     and principal point in war is to secure plenty of provisions and to destroy tIle enemy by
                     famine. An exact calculation must therefore be made before the commencement of the
                     war as to the number of troops and the expenses incident thereto, so that the provinces
                     may in plenty of time furnish the forage, corn, and all other kinds of provisions
                     demanded of them to be transported. They must be in more than sufficient quantity,
                     and gathered into the strongest and most convenient cities before the opening of the
                     campaign. If the provinces cannot raise their quotas in kind, they must commute for
                     them in money to be employed in procuring all things requisite for the service. For the
                     possessions of the subjects cannot be kept secure otherwise than by the defense of
                     arms.

                     These precautions often become doubly necessary as a siege is sometimes protracted
                     beyond expectation, the besiegers resolving to suffer themselves all the inconveniences
                     of want sooner than raise the siege, if they have any hopes of reducing the place by
                     famine. Edicts should be issued out requiring the country people to convey their cattle,
                     grain, wine and all kinds of provisions that may be of service to the enemy, into
                     garrisoned fortresses or into the safest cities. And if they do not comply with the order,
                     proper officers are to appointed to compel them to do it. The inhabitants of the province
                     must likewise be obliged to retire with their effects into some fortified place before the
                     irruption of the enemy. The fortifications and all the machines of different kinds must
                     also be examined and repaired in time. For if you are once surprised by the enemy
                     before you are in a proper posture of defense, you are thrown into irrecoverable
                     confusion, and you can no longer draw any assistance from the neighboring places, all
                     communication with them being cut off. But a faithful management of the magazines
                     and a frugal distribution of the provisions, with proper precautions taken at first, will
                     insure sufficient plenty. When provisions once begin to fail, parsimony is ill-timed and
                     comes too late.

                     On difficult expeditions the ancients distributed the provisions at a fixed allowance to
                     each man without distinction of rank; and when the emergency was past, the
                     government accounted for the full proportions. The troops should never want wood and
                     forage in winter or water in summer. They should have corn, wine, vinegar, and even
                     salt, in plenty at all times. Cities and fortresses are garrisoned by such mcn as are least
                     fit for thc service of the field. They arc provided with all sorts of arnms, arrows, fustibali,
                     slings, stones, onagri and balistae for their defense. Great caution is requisite that the
                     unsuspecting simplicity of the inhabitants be not imposed on by the treachery or perjury
                     of the enemy, for pretended conferences and deceitful appearance of truces have often
                     been more fatal than force. By observing the foregoing precautions, the besieged may
                     have it in their power to ruin the enemy by famine, if he keeps his troops together, and
                     if he divides.them, by frequent sallies and surprises.
 

GENERAL MAXIMS

                     It is the nature of war that what is beneficial to you is detrimental to the enemy and
                     what is of service to him always hurts you. It is therefore a maxim never to do, or to
                     omit doing, anything as a consequence of his actions, but to consult invariably your own
                     interest only. And you depart from this interest whenever you imitate such measures as
                     he pursues for his benefit. For the same reason it would be wrong for him to follow such
                     steps as you take for your advantage.

                     The more your troops have been accustomed to camp duties on frontier stations and the
                     more carefully they have been disciplined, the less danger they will be exposed to in the
                     field.

                     Men must be sufficiently tried before they are led against the enemy.

                     It is much better to overcome the enemy by famine, surprise or terror than by general
                     actions, for in the latter instance fortune has often a greater share than valor. Those
                     designs are best which the enemy are entirely ignorant of till the moment of execution.
                     Opportunity in war is often more to be depended on than courage.

                     To debauch the enemy's soldiers and encourage them when sincere in surrendering
                     themselves, is of especial service, for an adversary is more hurt by desertion than by
                     slaughter.

                     It is better to have several bodies of reserves than to extend your front too much.

                     A general is not easily overcome who can form a true judgment of his own and the
                     enemy's forces.

                     Valor is superior to numbers.

                     The nature of the ground is often of nmore consequence than courage.

                     Few men are born brave; many become so through care and force of discipline.

                     An army is strengthened by labor and enervated by idleness.

                     Troops are not to be led to battle unless confident of success.

                     Novelty and surprise throw an enemy into consternation; but common incidents have no
                     effect.

                     He who rashly pursues a flying enemy with troops in disorder, seems inclined to resign
                     that victory which he had before obtained.

                     An army unsupplied with grain and other necessary provisions will be vanquished without
                     striking a blow.

                     A general whose troops are superior both in number and bravery should engage in the
                     oblong square, which is the first formation.

                     He who judges himself inferior should advance his right wing obliquely against the
                     enemy's left. This is the second formation.

                     If your left wing is strongest, you must attack the enemy's right according to the third
                     formation.

                     The general who can depend on the discipline of his men should begin the engagement
                     by attacking both the enemy's wings at once, the fourth formation.

                     He whose light infantry is good should cover his center by forming them in its front and
                     charge both the enemy's wings at once. This is the fifth formation.

                     He who cannot depend either on the number or courage of his troops, if obliged to
                     engage, should begin the action with his right and endeavor to break the enemy's left,
                     the rest of his army remaining formed in a line perpendicular to the front and extended
                     to the rear like a javelin. This is the sixth formation.

                     If your forces are few and weak in comparison to the enemy, you must make use of the
                     seventh formation and cover one of your flanks either with an eminence, a city, the sea,
                     a river or some protection of that kind.

                     A general who trusts to his cavalry should choose the proper ground for them and
                     employ them principally in the action.

                     He who depends on his infantry should choose a situation most proper for them and
                     make most use of their service.

                     When an enemy's spy lurks in the camp, order all your soldiers in the day time to their
                     tents, and he will instantly be apprehended.

                     On finding the enemy has notice of your designs, you must immediately alter your plan
                     of operations.

                     Consult with many on proper measures to be taken, but communicate the plans you
                     intend to put in execution to few, and those only of the most assured fidelity; or rather
                     trust no one but yourself.

                     Punishment, and fear thereof, are necessary to keep soldiers in order in quarters; but in
                     the field they are more influenced by hope and rewards.

                     Good officers never engage in general actions unless induced by opportunity or obliged
                     by necessity.

                     To distress the enemy more by famine than the sword is a mark of consummate skill.

                     Many instructions might be given with regard to the cavalry. But as this branch of the
                     service has been brought to perfection since the ancient writers and considerable
                     improvements have been made in their drills and maneuvers, their arms, and the
                     quality and management of their horses, nothing can be collected from their works. Our
                     present mode of discipline is sufficient.

                     Dispositions for action must be carefully concealed from the enemy, lest they should
                     counteract them and defeat your plans by proper expedients.

                     This abridgment of the most eminent military writers, invincible Emperor, contains the
                     maxims and instructions they have left us, approved by different ages and confirmed by
                     repeated experience. The Persians admire your skill in archery; the Huns and Alans
                     endeavor in vain to imitate your dexterity in horsemanship; the Saracens and Indians
                     cannot equal your activity in the hunt; and even the masters at arms pique themselves
                     on only part of that knowledge and expertness of which you give so many instances in
                     their own profession. How glorious it is therefore for Your Majesty with all these
                     qualifications to unite the science of war and the art of conquest, and to convince the
                     world that by Your conduct and courage You are equally capable of performing the duties
                     of the soldier and the general!

                     * An instrument with four points so designed that when any three of them are on the
                     ground the fourth projects upward. These are extensively used today for antitank
                     barriers.