The appendices to "The Lord of the Rings" state that the Nazgûl re-emerged over a thousand years later in the Third Age, when the Lord of the Nazgûl led Sauron's forces against the successor kingdoms of Arnor: Rhudaur, Cardolan, and Arthedain. He effectively destroyed all of these, but was eventually defeated by the Elf-lord Glorfindel, who put him to flight, and made the prophecy that "not by the hand of man will he fall". He escaped, and returned to Mordor. There, he gathered the other Nazgûl in preparation for the return of Sauron to that realm.