During the war, Éothain and his sister are sent on a horse by their mother Morwen to alert Théoden that the Wild Men are gallivanting through Rohan, burning villages. They arrive shortly after Théodred's funeral, and Éothain was seen fainting, falling from the horse. The siblings are kept in Edoras until they arrive Helm's Deep shortly after the Warg attack and are reunited with their mother.