Then Manw? said to the Valar: 'This is the counsel of Il?vatar in my heart: that we should take up again the mastery of Arda, at whatsoever cost, and deliver the Quendi from the shadow of Melkor.' Then Tulkas was glad; but Aul? was grieved, foreboding the hurts of the world that must come of that strife. But the Valar made ready and came forth from Aman in strength of war, resolving to assault the fortresses of Melkor and make an end. Never did Melkor forget that this war was made for the sake of the Elves, and that they were the cause of his downfall. Yet they had no part in those deeds, and they know little of the riding of the might of the West against the North in the beginning of their days.
Melkor met the onset of the Valar in the North-west of Middle-earth, and all that region was much broken. But the first victory of the hosts of the West was swift, and the servants of Melkor fled before them to Utumno. Then the Valar passed over Middle-earth, and they set a guard over Cuivi?nen; and thereafter the Quendi knew nothing of the great Battle of the Powers, save that the Earth shook and groaned beneath them, and the waters were moved, and in the north there were lights as of mighty fires. Long and grievous was the siege of Utumno, and many battles were fought before its gates of which naught but the rumour is known to the Elves. In that time the shape of Middle-earth was changed, and the Great Sea that sundered it from Aman grew wide and deep; and it broke in upon the coasts and made a deep gulf to the southward. Many lesser bays were made between the Great Gulf and Helcarax? far in the north, where Middle-earth and Aman came nigh together. Of these the Bay of Balar was the chief; and into it the mighty river Sirion flowed down from the new-raised highlands northwards: Dorthonion, and the mountains about Hithlum. The lands of the far north were all made desolate in those days; for there Utumno was delved exceeding deep, and its pits were filled with fires and with great hosts of the servants of Melkor.
But at the last the gates of Utumno were broken and the halls unroofed, and Melkor took refuge in the uttermost pit. Then Tulkas stood forth as champion of the Valar and wrestled with him, and cast him upon his face; and he was bound with the chain Angainor that Aul? had wrought, and led captive; and the world had peace for a long age.
Nonetheless the Valar did not discover all the mighty vaults and caverns hidden with deceit far under the fortresses of Angband and Utumno. Many evil things still lingered there, and others were dispersed and fled into the dark and roamed in the waste places of the world, awaiting a more evil hour; and Sauron they did not find.
But when the Battle was ended and from the ruin of the North great clouds arose and hid the stars, the Valar drew Melkor back to Valinor, bound hand and foot, and blindfold; and he was brought to the Ring of Doom. There he lay upon his face before the feet of Manw? and sued for pardon; but his prayer was denied, and he was cast into prison in the fastness of Mandos, whence none can escape, neither Vala, nor Elf, nor mortal Man. Vast and strong are those halls, and they were built in the west of the land of Aman. There was Melkor doomed to abide for three ages long, before his cause should be tried anew, or he should plead again for pardon.
Then again the Valar were gathered in council, and they were divided in debate. For some, and of those Ulmo was the chief, held that the Quendi should be left free to walk as they would in Middle-earth, and with their gifts of skill to order all the lands and heal their hurts. But the most part feared for the Quendi in the dangerous world amid the deceits of the starlit dusk; and they were filled moreover with the love of the beauty of the Elves and desired their fellowship. At the last, therefore, the Valar summoned the Quendi to Valinor, there to be gathered at the knees of the Powers in the light of the Trees for ever; and Mandos broke his silence, saying: