 However, the Elves manage to stay his assault, and most of their realms remain unconquered; one of the most powerful of these is Doriath, ruled by Thingol.In addition, after some time the Noldorin Elves forsake Valinor and pursue Morgoth to Middle-earth in order to take vengeance upon him.Together with the Sindar of Beleriand, they proceed to lay siege to Angband, and establish new strongholds and realms in Middle-earth, including Hithlum ruled by Fingon, Nargothrond by Finrod Felagund and Gondolin by Turgon.