Justin Martyr (150-160)
http://www.ccel.org/ccel/schaff/anf01.viii.i.html
First Apology 39
And when the Spirit of prophecy speaks as predicting things that are to come to pass, He speaks in this way: “For out of Zion shall go forth the law, and the word of the Lord from Jerusalem. And He shall judge among the nations, and shall rebuke many people; and they shall beat their swords into ploughshares, and their spears into pruning-hooks: nation shall not lift up sword against nation, neither shall they learn war any more.”1849 And that it did so come to pass, we can convince you. For from Jerusalem there went out into the world, men, twelve in number, and these illiterate, of no ability in speaking: but by the power of God they proclaimed to every race of men that they were sent 176by Christ to teach to all the word of God; and we who formerly used to murder one another do not only now refrain from making war upon our enemies, but also, that we may not lie nor deceive our examiners, willingly die confessing Christ. For that saying, “The tongue has sworn, but the mind is unsworn,”1850 might be imitated by us in this matter. But if the soldiers enrolled by you, and who have taken the military oath, prefer their allegiance to their own life, and parents, and country, and all kindred, though you can offer them nothing incorruptible, it were verily ridiculous if we, who earnestly long for incorruption, should not endure all things, in order to obtain what we desire from Him who is able to grant it.
http://www.ccel.org/ccel/schaff/anf01.viii.ii.xxxix.html
Trypho 110
And when I had finished these words, I continued: “Now I am aware that your teachers, sirs, admit the whole of the words of this passage to refer to Christ; and I am likewise aware that they maintain He has not yet come; or if they say that He has come, they assert that it is not known who He is; but when He shall become manifest and glorious, then it shall be known who He is. And then, they say, the events mentioned in this passage shall happen, just as if there was no fruit as yet from the words of the prophecy. O unreasoning men! understanding not what has been proved by all these passages, that two advents of Christ have been announced: the one, in which He is set forth as suffering, inglorious, dishonoured, and crucified; but the other, in which He shall come from heaven with glory, when the man of apostasy, 2367 who speaks strange things against the Most 254 High, shall venture to do unlawful deeds on the earth against us the Christians, who, having learned the true worship of God from the law, and the word which went forth from Jerusalem by means of the apostles of Jesus, have fled for safety to the God of Jacob and God of Israel; and we who were filled with war, and mutual slaughter, and every wickedness, have each through the whole earth changed our warlike weapons,— our swords into ploughshares, and our spears into implements of tillage, —and we cultivate piety, righteousness, philanthropy, faith, and hope, which we have from the Father Himself through Him who was crucified; and sitting each under his vine, i.e., each man possessing his own married wife. For you are aware that the prophetic word says, ‘And his wife shall be like a fruitful vine.’ 2368 Now it is evident that no one can terrify or subdue us who have believed in Jesus over all the world. For it is plain that, though beheaded, and crucified, and thrown to wild beasts, and chains, and fire, and all other kinds of torture, we do not give up our confession; but the more such things happen, the more do others and in larger numbers become faithful, and worshippers of God through the name of Jesus. For just as if one should cut away the fruit-bearing parts of a vine, it grows up again, and yields other branches flourishing and fruitful; even so the same thing happens with us. For the vine planted by God and Christ the Saviour is His people. But the rest of the prophecy shall be fulfilled at His second coming. For the expression, ‘He that is afflicted [and driven out],’ i.e., from the world, [implies] that, so far as you and all other men have it in your power, each Christian has been driven out not only from his own property, but even from the whole world; for you permit no Christian to live. But you say that the same fate has befallen your own nation. Now, if you have been cast out after defeat in battle, you have suffered such treatment justly indeed, as all the Scriptures bear witness; but we, though we have done no such [evil acts] after we knew the truth of God, are testified to by God, that, together with the most righteous, and only spotless and sinless Christ, we are taken away out of the earth. For Isaiah cries, ‘Behold how the righteous perishes, and no man lays it to heart; and righteous men are taken away, and no man considers it.’ 2369
http://www.ccel.org/ccel/schaff/anf01.viii.iv.cx.html
Irenaeus (175-185)
http://www.ccel.org/ccel/schaff/anf01.ix.i.html
Apostolic Preaching 61
Now as to the union and concord and peace of the animals of different kinds, [224] which by nature are opposed and hostile to each other, the Elders say that so it will be in truth at the coming of Christ, when He is to reign over all. For already in a symbol he announces the gathering together in peace and concord, through the name of Christ, of men of unlike races and (yet) of like dispositions. For, when thus united, on the righteous, who are likened to calves and lambs and kids and sucking children, those inflict no hurt at all who in the former time were, through their rapacity, like wild beasts in manners and disposition, both men and women; so much so that some of them were like wolves and lions, ravaging the weaker and warring on their equals; while the women (were like) leopards or asps, who slew, it may be, even their loved ones with deadly poisons, or by reason of lustful desire. (But now) coming together in one name [225] they have acquired righteous habits by the grace of God, changing their wild and untamed nature. And this has come to pass already. For those who were before exceeding wicked, so that they left no work of ungodliness undone, learning of Christ and believing on Him, have at once believed and been changed, so as to leave no excellency of righteousness undone; so great is the transformation which faith in Christ the Son of God effects for those who believe on Him. And he says: Rising up to rule the Gentiles, because He is to die and rise again, and be confessed and believed as the Son of God (and) King. On this account he says: And His rising up shall be honor: that is, glory; for then was He glorified as God, when He rose.
http://www.earlychristianwritings.com/text/demonstrationapostolic.html
Against Heresies 4.34
If any one, however, advocating the cause of the Jews, do maintain that this new covenant consisted in the rearing of that temple which was built under Zerubbabel after the emigration to Babylon, and in the departure of the people from thence after the lapse of seventy years, let him know that the temple constructed of stones was indeed then rebuilt (for as yet that law was observed which had been made upon tables of stone), yet no new covenant was given, but they used the Mosaic law until the coming of the Lord; but from the Lord’s advent, the new covenant which brings back peace, and the law which gives life, has gone forth over the whole earth, as the prophets said: “For out of Zion shall go forth the law, and the word of the Lord from Jerusalem; and He shall rebuke many people; and they shall break down their swords into ploughshares, and their spears into pruning-hooks, and they shall no longer learn to fight.”4346 If therefore another law and word, going forth from Jerusalem, brought in such a [reign of] peace among the Gentiles which received it (the word), and convinced, through them, many a nation of its folly, then [only] it appears that the prophets spake of some other person. But if the law of liberty, that is, the word of God, preached by the apostles (who went forth from Jerusalem) throughout all the earth, caused such a change in the state of things, that these [nations] did form the swords and war-lances into ploughshares, and changed them into pruning-hooks for reaping the corn, [that is], into instruments used for peaceful purposes, and that they are now unaccustomed to fighting, but when smitten, offer also the other cheek,4347 then the prophets have not spoken these things of any other person, but of Him who effected them. This person is our Lord, and in Him is that declaration borne out; since it is He Himself who has made the plough, and introduced the pruning-hook, that is, the first semination of man, which was the creation exhibited in Adam,4348 and the gathering in of the produce in the last times by the Word; and, for this reason, since He joined the beginning to the end, and is the Lord of both, He has finally displayed the plough, in that the wood has been joined on to the iron, and has thus cleansed His land; because the Word, having been firmly united to flesh, and in its mechanism fixed with pins,4349 has reclaimed the savage earth. In the beginning, He figured forth the pruning-hook by means of Abel, pointing out that there should be a gathering in of a righteous race of men. He says, “For behold how the just man perishes, and no man considers it; and righteous men are taken away, and no man layeth it to heart.”4350 These things were acted beforehand in Abel, were also previously declared by the prophets, but were accomplished in the Lord’s person; and the same [is still true] with regard to us, the body following the example of the Head.
http://www.ccel.org/ccel/schaff/anf01.ix.vi.xxxv.html
Tertullian (197-220)
http://www.ccel.org/ccel/schaff/anf03.iv.ii.html
Jews 3
In short, the coming procession of a new law out of this “house of the God of Jacob” Isaiah in the ensuing words announces, saying, “For from Zion shall go out a law, and the word of the Lord out of Jerusalem, and shall judge among the nations,”—that is, among us, who have been called out of the nations,—“and they shall join to beat their glaives into ploughs, and their lances into sickles; and nations shall not take up glaive against nation, and they shall no more learn to fight.”1176 Who else, therefore, are understood but we, who, fully taught by the new law, observe these practices,—the old law being obliterated, the coming of whose abolition the action itself 1177 demonstrates? For the wont of the old law was to avenge itself by the vengeance of the glaive, and to pluck out “eye for eye,” and to inflict retaliatory revenge for injury.1178 But the new law’s wont was to point to clemency, and to convert to tranquillity the pristine ferocity of “glaives” and “lances,” and to remodel the pristine execution of “war” upon the rivals and foes of the law into the pacific actions of “ploughing” and “tilling” the land.
http://www.ccel.org/ccel/schaff/anf03.iv.ix.iii.html
Marcion 3.21
In these very words Isaiah says: “And it shall come to pass in the last days, that the mountain of the Lord,” that is, God’s eminence, “and the house of God,” that is, Christ, the Catholic temple of God, in which God is worshipped, “shall be established upon the mountains,” over all the eminences of virtues and powers; “and all nations shall come unto it; and many people shall go and say, Come ye, and let us go up to the mountain of the Lord, and to the house of the God of Jacob; and He will teach us His way, and we will walk in it: for out of Sion shall go forth the law, and the word of the Lord from Jerusalem.” 3395 The gospel will be this “way,” of the new law and the new word in Christ, no longer in Moses. “And He shall judge among the nations,” even concerning their error. “And these shall rebuke a large nation,” that of the Jews themselves and their proselytes. “And they shall beat their swords into ploughshares, and their spears 3396 into 340 pruning-hooks;” in other words, they shall change into pursuits of moderation and peace the dispositions of injurious minds, and hostile tongues, and all kinds of evil, and blasphemy. “Nation shall not lift up sword against nation,” shall not stir up discord. “Neither shall they learn war any more,” 3397 that is, the provocation of hostilities; so that you here learn that Christ is promised not as powerful in war, but pursuing peace. Now you must deny either that these things were predicted, although they are plainly seen, or that they have been accomplished, although you read of them; else, if you cannot deny either one fact or the other, they must have been accomplished in Him of whom they were predicted. For look at the entire course of His call up to the present time from its beginning, how it is addressed to the nations (Gentiles) who are in these last days approaching to God the Creator, and not to proselytes, whose election 3398 was rather an event of the earliest days. Verily the apostles have annulled 3399 that belief of yours.
http://www.ccel.org/ccel/schaff/anf03.v.iv.iv.xxi.html
Origen (203-250)
http://www.ccel.org/ccel/schaff/anf04.vi.ii.ii.html
Celsus 5.33
Moreover, the word of the Lord came forth from that very Jerusalem, that it might be disseminated through all places, and might judge in the midst of the heathen, selecting those whom it sees to be submissive, and rejecting 4197 the disobedient, who are many in number. And to those who inquire of us whence we come, or who is our founder, 4198 we reply that we are come, agreeably to the counsels of Jesus, to “cut down our hostile and insolent ‘wordy’ 4199 swords into ploughshares, and to convert into pruning-hooks the spears formerly employed in war.” 4200 For we no longer take up “sword against nation,” nor do we “learn war any more,” having become children of peace, for the sake of Jesus, who is our leader, instead of those whom our fathers followed, among whom we were “strangers to the covenant,” and having received a law, for which we give thanks to Him that rescued us from the error (of our ways), saying, “Our fathers honoured lying idols, and there is not among them one that causeth it to rain.” 4201 Our Superintendent, then, and Teacher, having come forth from the Jews, regulates the whole world by the word of His teaching. And having made these remarks by way of anticipation, we have refuted as well as we could the untrue statements of Celsus, by subjoining the appropriate answer.
http://www.ccel.org/ccel/schaff/anf04.vi.ix.v.xxxiii.html
Marcellus (298)
15. Agricolanus said, “Did you hurl down your weapons ?”
16. Marcellus said, “I did. It is not proper for a Christian man, one who fears the Lord Christ, to engage in earthly military service.”
https://www.ucc.ie/archive/milmart/Marcellus.html
Apostolic Tradition (215)
Hippolytus, The Apostolic Tradition
16 They will inquire concerning the works and occupations of those are who are brought forward for instruction. 2If someone is a pimp who supports prostitutes, he shall cease or shall be rejected. 3If someone is a sculptor or a painter, let them be taught not to make idols. Either let them cease or let them be rejected. 4If someone is an actor or does shows in the theater, either he shall cease or he shall be rejected. 5If someone teaches children (worldly knowledge), it is good that he cease. But if he has no (other) trade, let him be permitted. 6A charioteer, likewise, or one who takes part in the games, or one who goes to the games, he shall cease or he shall be rejected. 7If someone is a gladiator, or one who teaches those among the gladiators how to fight, or a hunter who is in the wild beast shows in the arena, or a public official who is concerned with gladiator shows, either he shall cease, or he shall be rejected. 8If someone is a priest of idols, or an attendant of idols, he shall cease or he shall be rejected. 9A military man in authority must not execute men. If he is ordered, he must not carry it out. Nor must he take military oath. If he refuses, he shall be rejected. 10If someone is a military governor,a or the ruler of a city who wears the purple, he shall cease or he shall be rejected. 11The catechumen or faithful who wants to become a soldier is to be rejected, for he has despised God. 12The prostitute, the wanton man, the one who castrates himself, or one who does that which may not be mentioned, are to be rejected, for they are impure. 13A magus shall not even be brought forward for consideration. 14An enchanter, or astrologer, or diviner, or interpreter of dreamsb, or a charlatanc, or one who makes amulets, either they shall cease or they shall be rejected. 15If someone’s concubine is a slave, as long as she has raised her children and has clung only to him, let her hear. Otherwise, she shall be rejected. 16The man who has a concubine must cease and take a wife according to the law. If he will not, he shall be rejected.
Hippolytus, The Apostolic Tradition
Lactantius (304-313)
http://www.ccel.org/ccel/schaff/anf07.iii.i.html
For they are aware that there is nothing among men more excellent than religion, and that this ought to be defended with the whole of our power; but as they are deceived in the matter of religion itself, so also are they in the manner of its defence. For religion is to be defended, not by putting to death, but by dying; not by cruelty, but by patient endurance; not by guilt, but by good faith: for the former belong to evils, but the latter to goods; and it is necessary for that which is good to have place in religion, and not that which is evil. For if you wish to defend religion by bloodshed, and by tortures, and by guilt, it will no longer be defended, but will be polluted and profaned.
Edict of Milan (313)
https://en.wikipedia.org/wiki/Edict_of_Milan
When I, Constantine Augustus, and I, Licinius Augustus, came under favorable auspices to Milan and took under consideration everything which pertained to the common weal and prosperity, we resolved among other things, or rather first of all, to make such decrees as seemed in many respects for the benefit of every one; namely, such as should preserve reverence and piety toward the deity. We resolved, that is, to grant both to the Christians and to all men freedom to follow the religion which they choose, that whatever heavenly divinity exists may be propitious to us and to all that live under our government.
https://www.ccel.org/ccel/schaff/npnf201.iii.xvi.v.html
First Council of Nicea, Canon 12 (325)
http://www.ccel.org/ccel/schaff/npnf214.iii.ii.html
As many as were called by grace, and displayed the first zeal, having cast aside their military girdles, but afterwards returned, like dogs, to their own vomit, (so that some spent money and by means of gifts regained their military stations); let these, after they have passed the space of three years as hearers, be for ten years prostrators. But in all these cases it is necessary to examine well into their purpose and what their repentance appears to be like. For as many as give evidence of their conversions by deeds, and not pretence, with fear, and tears, and perseverance, and good works, when they have fulfilled their appointed time as hearers, may properly communicate in prayers; and after that the bishop may determine yet more favourably concerning them. But those who take [the matter] with indifference, and who think the form of [not] entering the Church is sufficient for their conversion, must fulfil the whole time.
http://www.ccel.org/ccel/schaff/npnf214.vii.vi.xviii.html
Edict of Thessalonica (380)
https://en.wikipedia.org/wiki/Edict_of_Thessalonica
EMPERORS GRATIAN, VALENTINIAN AND THEODOSIUS AUGUSTI. EDICT TO THE PEOPLE OF CONSTANTINOPLE.
It is our desire that all the various nations which are subject to our Clemency and Moderation, should continue to profess that religion which was delivered to the Romans by the divine Apostle Peter, as it has been preserved by faithful tradition, and which is now professed by the Pontiff Damasus and by Peter, Bishop of Alexandria, a man of apostolic holiness. According to the apostolic teaching and the doctrine of the Gospel, let us believe in the one deity of the Father, the Son and the Holy Spirit, in equal majesty and in a holy Trinity. We authorize the followers of this law to assume the title of Catholic Christians; but as for the others, since, in our judgment they are foolish madmen, we decree that they shall be branded with the ignominious name of heretics, and shall not presume to give to their conventicles the name of churches. They will suffer in the first place the chastisement of the divine condemnation and in the second the punishment of our authority which in accordance with the will of Heaven we shall decide to inflict.
GIVEN IN THESSALONICA ON THE THIRD DAY FROM THE CALENDS OF MARCH, DURING THE FIFTH CONSULATE OF GRATIAN AUGUSTUS AND FIRST OF THEODOSIUS AUGUSTUS
— Codex Theodosianus, xvi.1.2
Augustine (386-430)
http://www.ccel.org/ccel/schaff/npnf104.v.ii.ii.html
Chapter 6.—21. It is indeed better (as no one ever could deny) that men should be led to worship God by teaching, than that they should be driven to it by fear of punishment or pain; but it does not follow that because the former course produces the better men, therefore those who do not yield to it should be neglected. For many have found advantage (as we have proved, and are daily proving by actual experiment), in being first compelled by fear or pain, so that they might afterwards be influenced by teaching, or might follow out in act what they had already learned in word.
Thoughts of War 