Hanno II the Great in the context of Barcid

The Mercenary War, also known as the Truceless War, was a mutiny by troops that were employed by Carthage at the end of the First Punic War (264–241 BC), supported by uprisings of African settlements revolting against Carthaginian control. It lasted from 241 to late 238 or early 237 BC and ended with Carthage suppressing both the mutiny and the revolt.

The war began in 241 BC as a dispute over the payment of wages owed to 20,000 foreign soldiers who had fought for Carthage in Sicily during the First Punic War. When a compromise seemed to have been reached, the army erupted into full-scale mutiny under the leadership of Spendius and Matho. 70,000 Africans from Carthage's oppressed dependent territories flocked to join them, bringing supplies and finance. War-weary Carthage fared poorly in the initial engagements of the war, especially under the generalship of Hanno. Hamilcar Barca, a veteran of the campaigns in Sicily (and father of Hannibal Barca), was given joint command of the army in 240 BC; and supreme command in 239 BC. He campaigned successfully, initially demonstrating leniency in an attempt to woo the rebels over. To prevent this, in 240 BC Spendius and Autaritus tortured 700 Carthaginian prisoners to death (including Gisco), after which the war was pursued with great brutality on both sides.

The Battle of Cape Ecnomus or Eknomos (Ancient Greek: Ἔκνομος) was a naval battle, fought off southern Sicily, in 256 BC, between the fleets of Carthage and the Roman Republic, during the First Punic War (264–241 BC). The Carthaginian fleet was commanded by Hanno and Hamilcar; the Roman fleet jointly by the consuls for the year, Marcus Atilius Regulus and Lucius Manlius Vulso Longus. It resulted in a clear victory for the Romans.

The Roman fleet of 330 warships plus an unknown number of transports had sailed from Ostia, the port of Rome, and had embarked approximately 26,000 picked legionaries shortly before the battle. They planned to cross to Africa and invade the Carthaginian homeland, in what is now Tunisia. The Carthaginians were aware of the Romans' intentions and mustered all available warships, 350, off the south coast of Sicily to intercept them. With a combined total of about 680 warships carrying up to 290,000 crew and marines, the battle was arguably the single largest battle of ancient history, and was possibly the largest naval battle in history by the number of combatants involved.