240 BCE

Carthage decides to give Hamilcar Barca joint command with Hanno the Great. Hamilcar Barca is able to end the siege of Utica by the mercenaries. He is then placed in complete command of the Carthaginian forces and defeats the mercenaries in the Battle of the Bagradas River. Two of Carthage's mercenary commanders – Spendius and Mathos – convince the Libyan conscripts of the mercenary army occupying the Carthaginian city of Tunis to accept their leadership. They persuade the native Libyans that Carthage will take revenge against them for their part in the conflict once the foreign mercenaries are paid and sent home. They then convince the combined mercenary armies to revolt against Carthage and convince the various native Libyan towns and cities to back the revolt. Spendius and Mathos then take the Carthaginian commander Gesco as a hostage. What has started as an argument over pay owed to soldiers by the Carthaginian Government, explodes into a full-scale revolt, known as the Mercenary War. The Hellenistic period Mathematician Eratosthenes estimates the Earth's circumference to be 252,000 stadia, a figure between 2%-20% off modern measurements.

In the 240s BC, the 3rd century BC.