Gaius Sosius was a Roman general and politician.
Gaius Sosius was elected quaestor in 66 BC and praetor in 49 BC. Upon the start of the civil war, he joined the party of the Senate sometimes called optimates by modern scholars (even though the term belongs to the era of Sulla and Marius). Upon the flight of Pompey to Greece, Sosius returned to Rome and submitted to Julius Caesar.
After the assassination of Caesar, Sosius joined the party of Mark Antony, by whom in 38 BC he was appointed governor of Syria and Cilicia in the place of Publius Ventidius. As governor, Sosius was commanded by Antony to support Herod against Antigonus the Hasmonean, when the latter was in possession of Jerusalem. In 37 BC, he advanced against Jerusalem and after he became master of the city, Sosius placed Herod upon the throne.
In return for this services, he was awarded a triumph in 34 BC, and he became consul along with Gnaeus Domitius Ahenobarbus as his colleague in 32 BC. When civil war broke out between Antony and Octavian, Sosius espoused the cause of Antony and violently attacked Octavian in the senate, for which he was forced to flee to the east. In 31 BC, Sosius commanded a squadron in Mark Antony's fleet with which he managed to defeat the squadron of Taurius Rufus – according to Dio 50.14 – and put it to flight, but when the latter was reinforced by Marcus Agrippa, Sosius's ally Tarcondimotus – the king of Cilicia – was killed and Sosius himself was forced to flee. Dio mistakenly suggests that Sosius died as well, but later affirms he was alive at the battle of Actium. At Actium, Sosius commanded the left wing of the fleet. After the battle, from which he managed to escape, his hiding place was detected and Sosius was captured and brought before Octavian but, at the intercession of Lucius Arruntius, Octavian pardoned him. He returned to Rome and completed his building project on the temple of Apollo Medicus (begun in 34 BC), dedicating it in Octavian's name.
Sosius attended the Ludi Saeculares in 17 according to an inscription CIL 6.32323 = ILS 5050 as a quindecimvir.
Martha Hoffman Lewis, _The Official Priests of Rome under the Julio-Claudians. A Study of the Nobility from 44 B.C. to 68 A.D._, Rome 1955.
| Preceded by Imperator Caesar Augustus and Lucius Volcatius Tullus |
Consul of the Roman Republic with Gnaeus Domitius Ahenobarbus 32 BC |
Succeeded by Imperator Caesar Augustus and Marcus Valerius Messalla Corvinus |