Battle of the Pelennor Fields
Shortly before Aragorn takes the Paths of the Dead, he is joined by a contingent of his people accompanied by Arwen's brothers, Elladan and Elrohir, who bring him a gift from Arwen: a banner of black cloth. The banner is unfurled at the Battle of the Pelennor Fields to reveal the emblem of Elendil figured in "mithril", gems, and gold; this becomes the first triumphant public announcement of the king's return.