Gaius Calpurnius Piso was a politician and general from the Roman Republic. He became praetor urbanus in 72/71 BC. After being elected consul in 67 BC, Piso opposed Pompeius' friends, the tribunes Gaius Cornelius and Aulus Gabinius. Assigned both Gallia Narbonensis and Gallia Cisalpina, he remained as proconsul until 65, or perhaps later in Cisalpina. Piso defeated an Allobrogian rebellion and repressed troubles in Transpadana, for which he was unsuccessfully prosecuted by Caesar. He supported Cicero during the Catiline conspiracy.[1]