Siege of Barad-dûr

The Siege of Barad-dûr stands as the defining military and moral catastrophe of the Second Age, the moment when the Last Alliance of Elves and Men brought Sauron's power to an apparent end, only to sow the seeds of the Third Age's long twilight. It is the event that forged the central problem of the entire story: the One Ring, cut from Sauron's hand but not destroyed, becomes the instrument of his eventual return and the burden that the hobbits must carry to Mount Doom. The siege is not merely a past battle; it is the origin point of the Quest, the source of the Ring's curse, and the standard against which all later struggles are measured.

The Last Alliance and the Fall of Gil-galad

The siege was the culmination of the Last Alliance, a great host gathered to challenge Sauron's dominion. Elrond, who was the herald of Gil-galad, the High King of the Noldor, marched with his host and witnessed the war's final acts firsthand. The alliance achieved mastery at the Battle of Dagorlad, fought before the Black Gate of Mordor, where the combined might of the Elves and Men proved unstoppable. Elrond recalls that the Spear of Gil-galad, Aeglos, and the Sword of Elendil, Narsil, were weapons that none could withstand. This initial victory, however, only set the stage for the more terrible confrontation on the slopes of Orodruin, the mountain of fire where the Ring had been made.

The Last Combat and the Breaking of Narsil

The siege reached its climax in a final, mortal contest on the slopes of Orodruin. There, Gil-galad died, and Elendil fell, and Narsil broke beneath him. The breaking of the great sword was a symbolic shattering of the old order, a sign that the victory would be incomplete and costly. In this last combat, only a few stood by the fallen leaders: Círdan stood by Gil-galad, and Elrond stood by Elendil, while Isildur alone stood by his father. The isolation of these figures underscores the gravity of the moment, a desperate stand that would decide the fate of the world.

Isildur's Choice and the Ring's Survival

The most consequential act of the siege was not a blow struck in battle, but a decision made in its aftermath. Sauron himself was overthrown, and Isildur cut the Ring from his hand with the hilt-shard of his father's broken sword, Narsil, and took it for his own. Elrond, who had counseled against this, laments that Isildur took it as should not have been, and that it should have been cast then into Orodruin's fire nigh at hand where it was made. But few marked what Isildur did, and he would not listen to the counsel of Elrond and Círdan. This refusal to destroy the Ring, despite the fire being within reach, is the primal error that the entire narrative of the Third Age seeks to correct. The memory of this failure, preserved by Elrond, becomes the central lesson of the Council of Elrond and the justification for the Quest to destroy the Ring.

The Legacy of the Siege in the Third Age

The Siege of Barad-dûr did not end the conflict; it transformed it. The Ring's survival meant that Sauron's spirit endured, and the long defeat of the Third Age began. The memory of the siege faded in the South, where Boromir, hearing Elrond's account, exclaims that the tale of Isildur taking the Ring has long been forgotten, and that the people of Gondor believed it perished in the ruin of Sauron's first realm. This forgetting is itself a consequence of the siege, a loss of knowledge that leaves the later generations unprepared for the Ring's return. The siege's legacy is thus one of incomplete victory and hidden doom, a past that must be remembered and corrected if the present is to be saved.

The Siege's Echo in the War of the Ring

The consequences of the siege reverberate into the final days of the War of the Ring. When Frodo confronts a ruffian in the Shire, he declares that the Dark Tower has fallen, and there is a King in Gondor, and that Isengard has been destroyed. This statement directly links the fall of Barad-dûr to the restoration of the kingship, framing the final victory as a completion of the work that the Last Alliance began and failed to finish. The siege is thus not only a past event but a promise of what must be achieved again, this time with the Ring destroyed rather than taken. The echo of the siege in Frodo's words confirms that the entire quest has been a re-enactment and correction of the original failure, a second chance to do what Isildur would not.