The Last King
Angmar (‘Iron Home’, Sindarin) was a region and kingdom founded in Third Age 1300 in the far north of the Misty Mountains by the evil Lord of the Ringwraiths, who became known as the “Witch-king of Angmar”. Since the Witch-king was a vassal of the Dark Lord Sauron, it is presumed that Angmar’s wars against the successor kingdoms of Arnor were done at Sauron’s bidding.
The capital of Angmar was Carn Dûm.
Soon after Angmar was founded it waged war against the divided Dúnedain realms of Arthedain, Cardolan and Rhudaur. The Witch-king conquered Rhudaur, the weakest of Arnor’s successor kingdoms, and replaced its Dúnedain king with one of the native Hill-men, a wild tribe of men possibly descended from the “accursed” kin of Ulfang.
Now under the Witch-King’s control, Rhudaur in 1356 invaded Arthedain and in the attack, Arthedain’s King,Argeleb I, was slain. However, with the aid of the armies of Cardolan, Arthedain managed to maintain a line of defense along the Weather Hills.
In 1409 Angmar attacked Rivendell and Cardolan, besiegeing the former and destroying all of the latter’s settlements except its capital in the Barrow-downs. Since Rhudaur had fallen under Angmar’s control, this left Arthedain, without any allies that could aid them to a great extent, which struggled on for another 500 years. The last people of Cardolan died in the Great Plague, allowing Angmar to send Barrow-wights to infest the Barrow-downs.