The Dragon Cast Down

Et draco pugnabat, et angeli ejus... Angeli Satanae non illi tantum qui ei natura sunt et voluntate similes, sed et homines eorum laqueis irretiti, sunt intelligendi. Et non valuerunt. Silicet, toto tempore. Neque locus inventus est eorum amplius in coelo. Et projectus est draco ille magnus in terram. Antiquus hostis de spiritualibus expulsus, arctius in terrenis includitur. Hoc est de coelo praecipitari, et in terram mitti. Cui dicitur: Terram comedes cunctis diebus. In qua terra sanctorum pedibus conteritur, sicut scriptum est: Super aspidem et basiliscum ambulabis. Sanctus Beda, Explanatio Apocalyspsis, Liber II, Caput XII Source: Migne PL 93.167c

And the dragon fought, and his angels... 1 The angels of Satan are to be understood not only as those who are like him in nature and will, but even men who have been caught in their snares. And they did not prevail... That is, for all time. There was no place in heaven for them anymore. And the great dragon was cast down to earth. The ancient enemy, expelled from spiritual things, is closely shut up in the earth. This is to be thrown from heaven and to be cast onto the earth. To whom it is said: 'You shall eat of the earth all of your days.' 2 Which earth is trodden down by the feet of the holy, as it is written: 'You shall walk on the serpent and the basilisk.' 3 St Bede, Commentary On The Apocalypse, Book 2, Chapter 12 1 Apoc 12.7-9 2 Gen 3.14 3 Ps 90.13

Fallen Angels

Et cauda ejus habebat tertiam partem stellarum coeli, et misit illas in terram. Quod autem dicit draconis caudam traxisse tartiam partem stellarum coeli, bifariam hoc accipi potest; multi enim arbitrantur tertiam partem hominum credentium posse cum seducere. Sed quod verius intelligi debeat angelorum sibi subditorum eum adhuc principes esset, cum descenderet constitutione sua, tertiam partem seduxisse. Victorinus Petavionensis, Scoli in Apocalypsin Beati Joannis, Caput XII Source: Migne PL 5.336c

And his tail grasped a third part of the stars of heaven and cast them down to earth. 1 Here it says that the tail of the dragon dragged down a third part of the stars from heaven, and in two ways this can be understood. Many judge that he is able to seduce a third part of the faithful. But more accurately it should be understood that when he was prince a third part of the angels were under his command, and when he fell from his place, he drew down a third part with him.  Victorinus of Pettau, from the Commentary on the Apocalypse of St John, Chapter 12 1 Apoc 12.4

Fighting The Dragon

Qui custodiunt mandata Dei  Mandata Dei in fide Jesu Christi custodire, hoc est pugnare cum dracone, et ipsum provocare in praelium. Et gratias Deo, qui saevi draconis evacuavit incoeptus. Ecce enim, Dominum in carne natum exstinguere molitus, ejus resurrectione frustratur. Post apostolis fiduciam docendi refringere laborans, quasi mulierem, id est, totam Ecclesiam de rebus humanis auferre satagebat. Sed et hoc frustra nisus passim nunc singulas fidelium impugnat aetates. Unde et sequitur:   Et stetit super arenam maris. Id est, super multitudinem populi, quem projicit ventus a facie terrae. Illius, sine dubio, qui hostis machinas absorbere solet, idem hostis insidias et bella excitaturus insistit.  Sanctus Beda, Explanatio Apocalyspsis, Caput XII

'Those who keep the commandments of God...' 1 To keep the commandments of God in the faith of Jesus Christ, this is to fight with the dragon and to challenge him in battle. And thanks be to God, who foiled the raging dragon at the beginning. For indeed he who laboured to destroy the Lord born in the flesh, is frustrated by the resurrection. 2 Then exerting himself after to undermine the confidence of the Apostles' teaching, he strove to carry off, like the woman, 3 the whole Church from the sphere of human affairs, but as his attacks have everywhere been in vain, he now fights against each of the ages of the faithful. Whence it follows: And he stood on the sand of the sea 4 That is, over that multitude of people 'whom the wind throws forth from the face of the earth.' 5 Whence without doubt he who is accustomed to devour with hostile contrivances, the same enemy stands so that he raise up plots and wars. St Bede, from Commentary On Revelation, Chapter 12 1 Rev 12.17  2 Rev 12.4  3 Rev 12.6 4 Rev 12.18 5 Ps 1.4