Gaius Sosius was a prominent Roman general and politician, known for his unwavering support of Mark Antony during the tumultuous wars of the late Republic. His political career was marked by significant state offices and military commands, including his role as governor of Syria. Sosius played a crucial part in the expedition that led to the installation of Herod as king of Judea.
In 32 BC, Sosius ascended to the consulship at a time when the Second Triumvirate was dissolving, leading to open conflict between Antony and Octavian. Upon taking office, he took a stand against Octavian in the Senate, which ultimately forced him to flee Rome and join Antony in the Eastern Mediterranean.
During the civil war, Sosius emerged as one of Antony's key lieutenants, commanding a portion of the fleet at the pivotal battle of Actium in 31 BC. Following the defeat, he was captured but received a pardon, allowing him to return to public life. Under the reign of Emperor Augustus, Sosius was rehabilitated and became a member of a college of priests.
Among his notable contributions was the oversight of the rebuilding of the temple of Apollo Sosianus in Rome, which was named in his honor. His successful political and military endeavors likely led to the accumulation of significant wealth, and it is believed that he may have lived well into the reign of Augustus.