De Officiis

34 Then, too, in the case of a state in its external relations, the rights of war must be strictly observed. For since there are two ways of settling a dispute: first, by discussion; second, by physical force; and since the former is characteristic of man, the latter of the brute, we must resort to force only in case we may not avail ourselves of discussion. 35 |Excuse for war.| The only excuse, therefore, for going to war is that we may live in peace unharmed; and when the victory is won, we should spare those who have not been blood-thirsty and barbarous in their warfare. |Justice toward the vanquished.| For instance, our forefathers actually admitted to full rights of citizenship the Tusculans, Aequians, Volscians, Sabines, and Hernicians, but they razed Carthage and Numantia to the ground. I wish they had not destroyed Corinth; but I believe they had some special reason for what they did—its convenient situation, probably—and feared that its very location might some day furnish a temptation to renew the war. In my opinion, at least, we should always strive to secure a peace that shall not admit of guile. And if my advice had been heeded on this point, we should still have at least some sort of constitutional government, if not the best in the world, whereas, as it is, we have none at all.

Not only must we show consideration for those whom we have conquered by force of arms but we must also ensure protection to those who lay down their arms and throw themselves upon the mercy of our generals, even though the battering-ram has hammered at their walls. And among our countrymen justice has been observed so conscientiously in this direction, that those who have given promise of protection to states or nations subdued in war become, after the custom of our forefathers, the patrons of those states.

36 As for war, humane laws touching it are drawn up in the fetial code of the Roman People under all the guarantees of religion; and from this it may be gathered that no war is just, unless it is entered upon after an official demand for satisfaction has been submitted or warning has been given and a formal declaration made. Popilius was general in command of a province. In his army Cato's son was serving on his first campaign. When Popilius decided to disband one of his legions, he discharged also young Cato who was serving in that same legion. But when the young man out of love for the service stayed on in the field, his father wrote to Popilius to say that if he let him stay in the army, he should swear him into service with a new oath of allegiance, for in view of the voidance of his former oath he could not legally fight the foe. So extremely scrupulous was the observance of the laws in regard to the conduct of war. 37 There is extant, too, a letter of the elder Marcus Cato to his son Marcus, in which he writes that he has heard that the youth has been discharged by the consul,[I] when he was serving in Macedonia in the war with Perseus. He warns him, therefore, to be careful not to go into battle; for, he says, the man who is not legally a soldier has no right to be fighting the foe.

XII. Equidem etiam illud animadverto, quod, qui proprio nomine perduellis esset, is hostis vocaretur, lenitate verbi rei tristitiam mitigatam. Hostis enim apud maiores nostros is dicebatur, quem nunc peregrinum dicimus. Indicant duodecim tabulae: aut status dies cum hoste, itemque: adversus hostem aeterna auctoritas. Quid ad hanc mansuetudinem addi potest, eum, quicum bellum geras, tam molli nomine appellare? Quamquam id nomen durius effecit[32] iam vetustas; a peregrino enim recessit et proprie in eo, qui arma contra ferret, remansit.

38 Cum vero de imperio decertatur belloque quaeritur gloria, causas omnino subesse tamen oportet easdem, quas dixi paulo ante iustas causas esse bellorum. Sed ea bella, quibus imperii proposita gloria est, minus acerbe gerenda sunt. Ut enim cum civi aliter contendimus, si[33] est inimicus, aliter, si competitor (cum altero certamen honoris et dignitatis est, cum altero capitis et famae), sic cum Celtiberis, cum Cimbris bellum ut cum inimicis gerebatur, uter esset, non uter imperaret, cum Latinis, Sabinis, Samnitibus, Poenis, Pyrrho de imperio dimicabatur. Poeni foedifragi, crudelis Hannibal, reliqui iustiores. Pyrrhi quidem de captivis reddendis illa praeclara:

XII. This also I observe—that he who would properly have been called "a fighting enemy" (perduellis) was called "a guest" (hostis), thus relieving the ugliness of the fact by a softened expression; for "enemy" (hostis) meant to our ancestors what we now call "stranger" (peregrinus). This is proved by the usage in the Twelve Tables: "Or a day fixed for trial with a stranger" (hostis). And again: "Right of ownership is inalienable for ever in dealings with a stranger" (hostis). What can exceed such charity, when he with whom one is at war is called by so gentle a name? And yet long lapse of time has given that word a harsher meaning: for it has lost its signification of "stranger" and has taken on the technical connotation of "an enemy under arms."

38 But when a war is fought out for supremacy and when glory is the object of war, it must still not fail to start from the same motives which I said a moment ago were the only righteous grounds for going to war. But those wars which have glory for their end must be carried on with less bitterness. For we contend, for example, with a fellow-citizen in one way, if he is a personal enemy, in another, if he is a rival: with the rival it is a struggle for office and position, with the enemy for life and honour. So with the Celtiberians and the Cimbrians we fought as with deadly enemies, not to determine which should be supreme, but which should survive; but with the Latins, Sabines, Samnites, Carthaginians, and Pyrrhus we fought for supremacy. The Carthaginians violated treaties; Hannibal was cruel; the others were more merciful. From Pyrrhus we have this famous speech on the exchange of prisoners:

39 XIII. Atque etiam si quid singuli temporibus adducti hosti promiserunt, est in eo ipso fides conservanda, ut primo Punico bello Regulus captus a Poenis cum de captivis commutandis Romam missus esset iurassetque se rediturum, primum, ut venit, captivos reddendos in senatu non censuit, deinde, cum retineretur a propinquis et ab amicis, ad supplicium redire maluit quam fidem hosti datam fallere.

40 [Secundo autem Punico bello post Cannensem pugnam quos decem Hannibal Romam astrictos misit iure iurando se redituros esse, nisi de redimendis iis, qui capti erant, impetrassent, eos omnes censores, quoad quisque eorum vixit, qui peierassent, in aerariis reliquerunt nec minus illum, qui iuris iurandi fraude culpam invenerat. Cum enim Hannibalis permissu exisset de castris, rediit paulo post, quod se oblitum nescio quid diceret; deinde egressus e castris iure iurando se solutum putabat, et erat verbis, re non erat. Semper autem in fide quid senseris, non quid dixeris, cogitandum.

Maximum autem exemplum est iustitiae in hostem a maioribus nostris constitutum, cum a Pyrrho perfuga senatui est pollicitus se venenum regi daturum et eum necaturum, senatus et C. Fabricius perfugam Pyrrho dedidit. Ita ne hostis quidem et potentis et bellum ultro inferentis interitum cum scelere approbavit.][36]

Cum autem duobus modis, id est aut vi aut fraude, fiat iniuria, fraus quasi vulpeculae, vis leonis videtur; utrumque homine alienissimum, sed fraus odio digna maiore. Totius autem iniustitiae nulla capitalior quam eorum, qui tum, cum maxime fallunt, id agunt, ut viri boni esse videantur.

39 XIII. Again, if under stress of circumstances individuals have made any promise to the enemy, they are bound to keep their word even then. |(1) Regulus.| For instance, in the First Punic War, when Regulus was taken prisoner by the Carthaginians, he was sent to Rome on parole to negotiate an exchange of prisoners; he came and, in the first place, it was he that made the motion in the senate that the prisoners should not be restored; and in the second place, when his relatives and friends would have kept him back, he chose to return to a death by torture rather than prove false to his promise, though given to an enemy.

40 And again in the Second Punic War, after the Battle of Cannae, Hannibal sent to Rome ten Roman captives bound by an oath to return to him, if they did not succeed in ransoming his prisoners; and as long as any one of them lived, the censors kept them all degraded and disfranchised, because they were guilty of perjury in not returning. And they punished in like manner the one who had incurred guilt by an evasion of his oath: with Hannibal's permission this man left the camp and returned a little later on the pretext that he had forgotten something or other; and then, when he left the camp the second time, he claimed that he was released from the obligation of his oath; and so he was, according to the letter of it, but not according to the spirit. In the matter of a promise one must always consider the meaning and not the mere words.