Led by Gil-galad and Elendil, the Elves and the Men of Gondor and Arnor formed the "Last Alliance of Men and Elves" to fight Sauron. There was a long war and siege of Sauron's fortress Barad-dûr. In the last battle, Gil-galad and Elendil were killed by Sauron. After his father's death, Elendil' son Isildur cut off the One Ring from Sauron's hand. Sauron was defeated and the war ended. 