Kingdom of AngmarAngmar - "It was in the beginning of the reign of Malvegil of Arthedain that evil came to Arnor.  For at that time the realm of Angmar arose in the North beyond the Ettenmoors.  Its lands lay on both sides of the Mountains, and there were gathered many evil men, and Orcs, and other fell creatures. [The lord of that land was known as the Witch-king, but it was not known until later that he was indeed chief of the Ringwraiths, who came north with the purpose of destroying the Dúnedain in Arnor, seeing hope in their dominion while Gondor was strong.]" ~The Return of the King (Appendix A)