In 2509, Cirion the Steward of Gondor summoned the Éothéod to help repel an invasion of Men from Rhûn and Orcs from Mordor. Eorl the Young, lord of the Éothéod, answered the summons, arriving unexpected at a decisive battle on the Field of Celebrant, routing the orc army. As a reward, Éorl was given the Gondorian province of Calenardhon (except for Isengard).