Witch-king comes to Angmar to destroy the Dúnedain in Arnor
Event Type: Military/Strategic
Age: 3rd Age - The Kings
Evil things begin to multiply again. Orcs increase in the Misty Mountains.... The Nazgûl reappear. The chief of these comes north to Angmar.
The Return of the King, LoTR Appendix B, The Tale of Years: The Third Age
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 the chief of the Ringwraiths, who came north with the purpose of destroying the Dúnedain in Arnor, seeing hope in their disunion, while Gondor was strong.]
The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Eriador, Arnor, and the Heirs of Isildur: The North-kingdom and the Dúnedain
The Witch-king makes war on the realms of the Dúnedain, which are disunited.... The purpose of the Witch-king is to destroy Arnor, for there is more hope of success in the North (where the realm is disunited) than in the South while Gondor remains strong. At this time no descendants of Isildur remain in Rhudaur or Cardolan....
The Peoples of Middle-Earth, HoME Vol 12, Part 1, Ch 7, The Heirs of Elendil: The Northern Line of Arnor: The Isildurioni
Elena Tiriel 10Oct05, 10Jul06