The Sicilian revolt against the Second Triumvirate of the Roman Republic ended when the fleet of Sextus Pompey, the rebel leader, was defeated at the Battle of Naulochus. War between Sextus Pompey and the Second Triumvirate: The forces of the Second Triumvirate and Sextus Pompey, the last surviving son of Pompey the Great and the last leader of the Optimate faction, waged a civil war between 42 BC and 36 BC. The war consisted of mostly a number of naval engagements throughout the Mediterranean Sea and a land campaign primarily in Sicily that eventually ended in a victory for the Triumvirate and Sextus Pompey's death. The conflict is notable as the last stand of any organised opposition to the Triumvirate. September 3, 36 BC. Wiki link