Hornburg
The Hornburg is the great fortress of Helm's Deep, a fastness built by the sea-kings of Gondor in the far-off days of their glory, with the hands of giants. It stands at the mouth of the Deep, a heel of rock thrust outward by the northern cliff, upon which high walls of ancient stone were raised, and within them a lofty tower. The Hornburg was so called because a trumpet sounded upon the tower echoed in the Deep behind, as if armies long-forgotten were issuing to war from caves beneath the hills. A wall, too, the men of old had made from the Hornburg to the southern cliff, barring the entrance to the gorge. Beneath it by a wide culvert the Deeping-stream passed out. About the feet of the Hornrock it wound, and flowed then in a gully through the midst of a wide green gore, sloping gently down from Helm's Gate to Helm's Dike. There in the Hornburg at Helm's Gate Erkenbrand, master of Westfold on the borders of the Mark, now dwelt. As the days darkened with threat of war, being wise, he had repaired the wall and made the fastness strong.
The Siege and the Last Stand
When the host of Isengard, ten thousand strong, poured into the Deeping-coomb, the Hornburg became the last refuge of the Rohirrim. The Deeping Wall, twenty feet high and thick enough for four men to walk abreast along the top, was the first line of defense. Éomer arrayed most of his strength there, while the king and his household held the Hornburg itself. The assault was relentless: Orcs and wild men of Dunland swarmed against the wall, using grappling hooks, ladders, and a blasting fire from Orthanc that finally breached the wall. Aragorn, Legolas, and Gimli fought with desperate valor, with Gimli hewing forty-two Orcs and Legolas counting thirty-nine. The defense was swept away, and the Rohirrim were driven back, step by step, towards the caves and the citadel. Aragorn, standing alone above the ruined gates, parleyed with the Uruk-hai, declaring that no enemy had yet taken the Hornburg. The gates fell, and the Orcs prepared to charge, but at that moment the great horn of Helm rang out from the tower, and the echoes did not die.
The Arrival of the Dawn and the King's Charge
With the sound of the horn, King Théoden, who had been trapped in the tower, rode forth on Snowmane, his horse white as snow, his shield golden, and his spear long. At his right hand was Aragorn, and behind him rode the lords of the House of Eorl. They charged down from the gates, over the causeway, and drove through the hosts of Isengard as a wind among grass. The dawn had come, and with it, Gandalf the White, leading Erkenbrand and a thousand men on foot. The Huorns, trees from Fangorn Forest, had surrounded the valley, and the Orcs, caught between the king's charge and the forest, were utterly destroyed. The Hornburg had held, and the victory was complete.
The Aftermath and the Legacy
After the battle, the Hornburg became a place of legend. The dead were buried in mounds before the fortress, and the Orcs were piled in great heaps, later consumed by the Huorns. The Hornburg itself, though battered, stood as a symbol of the resilience of Rohan. The fortress's name, derived from the horn of Helm Hammerhand, who had defended it in ages past, was now forever linked to the victory of the War of the Ring. The Hornburg was not merely a fortress of stone; it was a crucible where the fate of the West was forged, and where the courage of a few held back the tide of darkness.