Okay, so I was a day late. You have my apologies. But I will now be applying myself to this story whenever possible, which is where the new portion of the title came from.
Introduction.
"The end will not be long" said the king. "But I will not end here, taken like an old badger in a trap. Snowmane and Hasufel and the horses of my guard are in the inner court. When dawn comes, I will bid men sound Helm's horn, and I shall ride forth. Will you ride with me then, son of Arathorn? Maybe we shall cleave a road, or make such an end as will be worth a song—if any be left to sing of us herafter."
"I will ride with you." said Aragorn.
Taking his leave, he returned to the walls, and passed round all their circuit, enheartening the men, and lending aid whenever the assault became too much. Legolas went with him. Blasts of fire, leaped up from below, shaking the stones. Grappling-hooks were hurled, and ladders raised. Again and again the Uruk-Hai gained the summit of the outer wall, and again the defenders cast them down.
There was a roar, and a mighty blast of fire. Archway of the gate crumbled in smoke and dust. The barricade was scattered as if by a thunderbolt. Aragorn ran to the king's tower.
But even as the gate fell and the Uruk-Hai around it swarmed in, the sound of the Great Horn rang out.
And the guard and the King rode out to meet the horde.
And the sound of the Horn rebounded across the gorge, but the echoes did not die. More horns picked up the note, and carried it onwards.
Forward, they went, a final stand against the forces of the Orthanc. And Aragorn looked to the East, and beheld a thousand men on foot, sounding the return horns, with Eomir at their head and the Mithrandir beside him. The light of the dawn, combined with the force of Mithrandir's magic startled the Uruk, and their pikes failed them, and the thousand on foot and the riders from the Deep swept through the Uruk horde like grass in a wind.
In another universe, the Uruk then broke ranks, fleeing for the safety of the forest, a forest from Fanghorn that provided no safety for man or orc under Saruman's banner.
For the purpose of this story, they held their ground. Soon, they even made a comeback, using the Fires of the Orthanc to create confusion amongst the Rohirrim while advancing, forcing the footmen to retreat. They fled with the riders, knowing that the women and children had already left the fortress through the mountain pass.