 While within a unit communication in the native tongue was possible, between units Greek and Punic helped to establish communication.According to Polybius, this enabled the insurgents during the Mercenary War, which is also the only recorded large mutiny of Carthage's troops, to communicate with each other on higher levels.The reported causes for this conflict were that following the First Punic War against Rome, payment of the mercenaries was delayed for over a year.