While his father was “the Great” and his brother Gnaeus was the “Imperator of Spain,” Sextus Pompeius carved out a legacy entirely his own. After the deaths of his father and brother at the hands of Caesar, Sextus became the last man standing for the Pompeian cause. He did not lead legions through traditional battlefields; instead, he mastered the Mediterranean, transforming himself from a fugitive into the “Son of Neptune.”
The Fugitive (45–43 BC)
Following the disastrous Battle of Munda in 45 BC, where his brother Gnaeus was killed, Sextus escaped into the mountains of northern Spain. He lived as a guerrilla leader, slowly gathering a following of those loyal to his family’s name.
His fortunes changed after the assassination of Julius Caesar in 44 BC. The Senate, briefly regaining power, recognized his influence and appointed him Commander of the Fleet (Praefectus Classis et Orae Maritimae). However, the rise of the Second Triumvirate (Octavian, Mark Antony, and Lepidus) quickly branded him a public enemy.
The King of the Sea
Sextus realized that if he could not hold the land, he would rule the water. He seized Sicily and Sardinia, turning the islands into a fortress.
• The “Son of Neptune”: Sextus leaned into naval propaganda, famously discarding the traditional Roman purple general’s cloak for a deep sea-blue one. He claimed the god Neptune was his true father.
• A Haven for the Dispossessed: His fleet was manned by a diverse coalition: professional sailors, former slaves, and aristocrats fleeing the Proscriptions in Rome.
• The Grain Blockade: By controlling Sicily, the “breadbasket of Rome,” Sextus was able to choke the city’s food supply, forcing Octavian into humiliating negotiations.
The Treaty of Misenum (39 BC)
By 39 BC, the Roman populace was rioting due to famine. Octavian and Antony were forced to meet Sextus at Misenum.
• The Deal: Sextus was officially recognized as the governor of Sicily, Sardinia, Corsica, and the Peloponnese.
• The Feast: During a banquet on Sextus’s flagship, one of his captains whispered that they should cut the anchor and kidnap the Triumvirs. Sextus famously replied that he wished the captain had done it without asking, as his honor wouldn’t allow him to break a guest’s trust once requested.
The Final Showdown: Naulochus (36 BC)
The peace was short-lived. Octavian’s right-hand man, Marcus Agrippa, spent years building a new fleet and training it in secret.
The Battle of Naulochus
The climax came at the Battle of Naulochus off the coast of Sicily.
1. The Harpax: Agrippa utilized a new invention—the harpax, a catapult-launched grappling hook that allowed Roman ships to snag and board Sextus’s more maneuverable vessels.
2. The Result: Sextus’s fleet was decimated. He was forced to flee Sicily with only 17 ships, abandoning his power base forever.
Death and Legacy
Sextus fled to the East, hoping to negotiate with Mark Antony. However, he was captured in Miletus (modern-day Turkey) and executed in 35 BC by one of Antony’s generals.
Why He Matters
Sextus Pompey was the bridge between the old Republic and the new Empire. He proved that:
• Naval Power could bring Rome to its knees.
• Propaganda (the “Son of Neptune” persona) was essential for modern Roman leadership.
• The Name “Pompey” remained so powerful that even a decade after the Great Pompey’s death, it could still command the loyalty of thousands.
Would you like to learn more about Marcus Agrippa’s naval innovations that finally defeated Sextus, or perhaps explore the life of Sextus’s mother, Mucia Tertia?