The successor to KingTar-Alcarin, who became the eighteenth ruler of Númenor. He was noted as a great military captain, who drove the forces of Sauron back into the east of Middle-earth. He was also the first King whose name is recorded with an Adûnaic equivalent, Ar-Belzagar, a sign of the ascendancy of the party of the so-called King's Men. There is some confusion over his successor. Earlier editions of The Lord of the Rings list the King following Tar-Calmacil as Ar-Adûnakhôr, but this may be due to an accidental omission, as evidence exists that Tar-Calmacil was in fact succeeded by his son Tar-Ardamin, and that Ar-Adûnakhôr was actually his grandson. This confusion has been resolved in later editions of the book, which insert Tar-Ardamin into the list.