Angmar (Sindarin: 'Iron-home'; pronounced [ˈaŋmar]) (on certain maps: Ângmâr) is a fictional kingdom in J. R. R. Tolkien's continent of Middle-earth.
Angmar was founded in T.A. 1300 in the far north of the Misty Mountains by the Lord of the Ringwraiths, who became known as the "Witch-king of Angmar". The Witch-king came north to attack the Dúnedain of Arnor, whose disunity made them an easier target than Gondor at that time.
The capital of Angmar was Carn Dûm where a race of evil men lived. Carn Dûm was established at an unknown date near Mount Gundabad.
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 Hillmen, a wild tribe of men possibly descended from the "accursed" kin of Ulfang.
Now under the Witch-king's control, Rhudaur in T.A. 1356 invaded Arthedain and in the attack, Arthedain King Argeleb I was slain. However, with the aid of the armies of Cardolan, Arthedain managed to maintain a line of defence along the Weather Hills.