Halbarad received a mysterious message requesting to come to the aid of his Chieftain Aragorn at Rohan (Legolas later surmised that it was actually sent by Galadriel who could read the hearts of men). Gathering thirty of his kin, and aided by Elladan and Elrohir who wished to join the war, they rode south to Rohan. They found Aragorn near Dol Baran before dawn on 6 March, T.A. 3019 and he admitted that Halbarad was often in his thoughts but had sent no message. Halbarad bore with him a furled standard, which was a gift from Arwen, and a message from her; and Elrohir conveyed a message from Elrond to take the Paths of the Dead. They journeyed with the Rohirrim to Helm's Deep, where they parted ways.
Spurred only by the strength of Aragorn's will, the Company with Legolas and Gimli entered the dark path at the dawn of the next day. At midnight[source?] Aragorn summoned the Dead at a clearing to follow him to the Stone of Erech. After creeping in the darkness for what seemed like ages, the Company emerged from the Paths and rode quickly through the mountain fields with the Dead behind. They followed the river Morthond briefly to Erech. The inhabitants of the surrounding countryside fled in fear, calling Aragorn the "King of the Dead".
Arriving at the large, black Stone of Erech at midnight, the legion of the Oathbreakers announced their allegiance to Aragorn. Aragorn unfurled a black flag and pronounced himself the Heir of Isildur. The Company rode on to Anduin.
On 11 March they were in Lamedon, and the Dead drove forth the assailants from Linhir, but the staunch defenders fled as well, except for Angbor. Aragorn bade him gather his folk and follow them. After Linhir they reached Lebennin. The Corsairs of Umbar were beaten back to Pelargir the next day.
On 13 March they found Pelargir overrun by Corsairs once again with fifty great ships and many more smaller vessels ready to sail to Harlond. The Company and the Dead drove the Corsairs away. After manning the Black Ships, Aragorn released the curse of the Dead. Halbarad captained a Corsair ship and they sailed toward Harlond.
 Portrayal in adaptations
- In the opening narration, Gandalf mentions Aragorn travels with a small band of kinsmen.
2010: The Lord of the Rings Online:
- The Grey Company plays a major role in the game beginning with the Volume III: Allies of the King. Other than Halbarad and the Sons of Elrond, sixty-two other Rangers and the player form the Grey Company as they journey south. Their path through Dunland is beset by many dangers, as many Rangers are killed and some are forced to either turn back or stay behind until only thirty remain by the time they finally meet with Aragorn. Other than Halbarad, seven other Rangers are killed in the Battle of the Pelennor Fields while the rest join the Host of the West on the march towards the Black Gate. Only one of the Rangers falls during the battle and all of the survivors attend the wedding of Aragorn and Arwen after which they finally part ways. Some decide to return north to Eriador while others choose to remain in Gondor and serve King Elessar alongside Rangers of Ithilien against the dangers still remaining in Mordor.
- ↑ 1.0 1.1 1.2 1.3 1.4 J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Passing of the Grey Company"
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Great Years"
- ↑ J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Last Debate"
- ↑ J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Battle of the Pelennor Fields"