First invasion of Syria
Pacorus is first mentioned in 51 BC, then probably about 12 years oldRoman province of Syria. However, because of the young age of Pacorus, the Parthian operations were probably led by the Parthian commander
Osakes. According to the Roman historian Cassius Dio, the Parthian army besieged Antioch, but were unable to capture the city and withdrew. During this event, Osakes was killed during a Roman counter-attack under the Roman general Gaius Cassius Longinus, which made the Parthian troops under Pacorus retreat back to their homeland.
, as the head of a Parthian army during an invasion of the