Sauron ~ The Dark Lord of the Rings

Now Sauron's lust and pride increased, until he knew no bounds, and he determined to make himself master of all things in Middle-earth, and to destroy the Elves, and to compass if he might, the downfall of Númenor. He brooked no freedom nor any rivalry, and he named himself Lord of the Earth. A mask he still could wear so that if he wished he might deceive the eyes of Men, seeming to them wise and fair. But he ruled rather by force and fear, if they might avail; and those who perceived his shadow spreading over the world called him the Dark Lord and named him the Dark Enemy; and he gathered under his government all the evil things of the days of Morgoth

Sauron was The Dark Lord of the Rings and Evil Creator of the One Ring, Sauron sought to conquer Middle-earth . and plan The Rings of Power. The Dark Lord was The Beginning of Evil and strove to dominate Middle-earth. he never be vanquished when One Ring was reclaimed to him as The Physical Form (his corporal form) in
the Second Age and the Third Age.

However, as he put on his Ring the Elves sensed his treachery, and removed their Rings and hid them. Having raised the fortress of Barad-dûr in Mordor in SA 1600,