Led by Elendil, nine ships carrying faithful Númenóreans were saved from the Downfall; they founded the kingdoms of Gondor and Arnor in Middle-earth. Sauron returned to Mordor; Mount Doom again erupted. Sauron captured Minas Ithil and destroyed the White Tree; Isildur escaped down the Anduin. Anárion defended Osgiliath and for a time drove Sauron's forces back to the mountains. Isildur and Anárion formed an alliance and defeated Sauron at Dagorlad. They invaded Mordor and laid siege to Barad-dûr for seven years. Sauron was killed by Gil-galad and Elendil, who perished in the act. When Elendil fell, his sword Narsil broke beneath him. Isildur took up the hilt-shard of Narsil and cut the One Ring from Sauron's hand, vanquishing Sauron. Elrond and Círdan, Gil-galad's lieutenants, urged Isildur to destroy the Ring by casting it into Mount Doom, but he refused and kept it for his own.