The army of the Dead Men of Dunharrow who rallied to Aragorn at the Stone of Erech.

The Shadow Host rode with the Dunedain to the Port of Pelargir . There they drove the Corsairs of Umbar from their ships, enabling the Dunedain to sail to the relief of Minas Tirith.

Once the ships were taken, the Shadow Host were deemed to have fulfilled their oath. Their souls were released and their ghosts disappeared from Middle-Earth.