Tolkien / Gondor knight

Prince Eärnur leading Gondor knights during Battle of the Fornost

Armies of Angmar conquered Arthedain, the last realm of Arnor. Angmar's armies had taken Fornost, the capital of the Dúnedain, and Arvedui, the last King of Arthedain, had drowned in the Icebay of Forochel. A year later, a fleet of ships under Eärnur arrived in the Grey Havens and set off toward what was left of the once-great northern kingdom. With the army from Gondor came men from Rhovanion, Elves from Lindon, and the remainder of the Dúnedain. According to Shire historians, a company of archers was also sent to the battle.

The battle itself did not take place in the city of Fornost, but on the plains to the west of the city, near Lake Evendim. The armies of Angmar hurried west to meet the assault, and seeing this, the cavalry of Gondor rode north into the Hills of Evendim to wait in ambush. As the main part of the army of Gondor met the enemy in battle, Gondor's cavalry set out from the hills to strike the rear of the army of Angmar. This served as the turning point in the battle, and allowed the combined armies of the west to gain the advantage. Realizing that his forces were all but completely destroyed, the Witch-king of Angmar fled eastward. As he fled, an army led by Glorfindel came up out of the south and blocked his escape, destroying what was left of his crumbling army.

Eärnur then challenged the Witch-king to single combat, but his horse panicked under the Nazgûl's evil power and the Witch-king mocked him, although his laughter turned to flight with the arrival of Glorfindel.