Following Aragorn, the Army of the Dead strikes terror into the Corsairs of Umbar invading southern Gondor. Aragorn defeats the Corsairs and uses their ships to transport the men of southern Gondor up the Anduin, reaching Minas Tirith just in time to turn the tide of battle. Théoden's niece Éowyn, who joined the army in disguise, kills the Lord of the Nazgûl with help from Merry; both are wounded. Together, Gondor and Rohan defeat Sauron's army in the Battle of the Pelennor Fields, though at great cost; King Théoden is among the dead.