Lord of the Rings Reread: The Black Gate Opens
The Captains mounted again and rode back, and from the host of Mordor there went up a jeering yell. Dust rose smothering the air, as from nearby there marched up an army of Easterlings that had waited for the signal in the shadows of Ered Lithui beyond the further Tower. Down from the hills on either side of the Morannon poured Orcs innumerable. The men of the West were trapped, and soon. all about the grey mounds where they stood, forces ten times and more than ten times their match would ring them in a sea of enemies. Sauron had taken the proffered bait in jaws of steel.
Little time was left to Aragorn for the ordering of his battle. Upon the one hill he stood with Gandalf, and there fair and desperate was raised the banner of the Tree and Stars. Upon the other hill hard by stood the banners of Rohan and Dol Amroth, White Horse and Silver Swan. And about each hill a ring was made facing all ways, bristling with spear and sword. But in the front towards Mordor where the first bitter assault would come there stood the sons of Elrond on the left with the Dúnedain about them, and on the right the Prince Imrahil with the men of Dol Amroth tall and fair, and picked men of the Tower of Guard.
The wind blew, and the trumpets sang, and arrows whined; but the sun now climbing towards the South was veiled in the reeks of Mordor, and through a threatening haze it gleamed, remote, a sullen red, as if it were the ending of the day, or the end maybe of all the world of light. And out of the gathering mirk the Nazgûl came with. their cold voices crying words of death; and then all hope was quenched.