War of Wrath
Ancalagon the Black (Sindarin: "rushing jaws" from "anc" 'jaw', "alag" 'impetuous') was a dragon bred by Morgoth during the First Age of Middle-earth, as told in "The Silmarillion". He was one of Morgoth's most powerful servants, bred to be the greatest and mightiest of all dragons, and the first of the winged "fire-drakes". He arose like a storm of wind and fire from the infernal pits of Angband beneath the Iron Mountains, as a last defense of the realm of Dor Daedeloth. Near the end of the War of Wrath that pitted Morgoth's hosts against the Host of the Valar, Morgoth sent Ancalagon to lead a fleet of winged dragons from the fortress of Angband to destroy the Dark Lord's enemies. So powerful was the assault of the dragon flight that the Host of the Valar was driven back from the gates of Angband onto the ashy plain of Anfauglith. Eärendil 'The Blessed' in his powerfully hallowed Elven airborne ship "Vingilot", aided by Thorondor and the great Eagles, battled Ancalagon and his dragons for an entire day. At length Eärendil prevailed, casting Ancalagon upon the triple-peaked towers of Thangorodrim, destroying both Ancalagon and the towers. With his last and mightiest defender slain, Morgoth was soon utterly defeated and made captive, thus ending the War of Wrath.