In AD 115 the Roman emperor Trajan conquered Mesopotamia as main part of his Parthian campaign. He also reached Characene, where he saw ships bound for India. According to Cassius Dio, Attambelos ruled there and was friendly to the emperor. Also the people of Charax Spasinu are described as friendly towards the emperor. The following two years, the Charakene remained most likely Roman, but emperor Hadrian decided to withdraw from Trajan's territorial gains. It remains uncertain whether the Charakene remained independent or whether it was placed under direct Parthian rule. The next Parthian king attested in ancient sources is Meredates, mentioned in an inscription at Palmyra datable to 131.