The gens Pompeia was a plebeian family at ancient Rome, first appearing in history during the second century BC, and frequently occupying the highest offices of the Roman state from then until imperial times. The first of the Pompeii to obtain the consulship was Quintus Pompeius in 141 BC, but by far the most illustrious of the gens was Gnaeus Pompeius, surnamed Magnus, a distinguished general under the dictator Sulla, who became a member of the First Triumvirate, together with Caesar and Crassus. After the death of Crassus, the rivalry between Caesar and Pompeius led to the Civil War, one of the defining events of the final years of the Roman Republic.