In consequence of rejecting, at the wish of the
Romans, a marriage with
Laodice V, the sister of
Demetrius I Soter, the latter made war upon Ariarathes, and brought forward
Orophernes of Cappadocia, his brother and one of the supposed sons of the late king, as a claimant of the throne. Ariarathes was deprived of his kingdom, and fled to Rome in around 158 BC. He was restored to his throne by the Romans, who, however, allowed Orophernes to reign jointly with him, as is expressly stated by
Appian, and implied by
Polybius. The joint government, however, did not last long; for, shortly afterwards, Ariarathes was named as sole king. In 154, Ariarathes assisted the king of
Pergamon,
Attalus II, in his war against
Prusias II of Bithynia, and sent his son Demetrius in command of his forces. Ariarathes was killed in 130, during the war of the Romans against
Aristonicus of Pergamon. In return for the assistance and support Ariarathes has provided to the Romans on that occasion,
Lycaonia and
Cilicia were added by the Romans to the dominions of his family. == Marriage and succession ==