stylistic:style_transfer
Background and origin

The Roman Republic had been aggressively expanding in the southern Italian mainland for a century before the First Punic War. It had conquered peninsular Italy south of the Arno River by 270 BC, when the Greek cities of southern Italy (Magna Graecia) submitted after the conclusion of the Pyrrhic War. During this period of Roman expansion Carthage, with its capital in what is now Tunisia, had come to dominate southern Iberia, much of the coastal regions of North Africa, the Balearic Islands, Corsica, Sardinia and the western half of Sicily in a thalassocracy.

Beginning in 480 BC Carthage fought a series of inconclusive wars against the Greek city-states of Sicily, led by Syracuse. By 264 BC Carthage was the dominant external power on the island, and Carthage and Rome were the preeminent powers in the western Mediterranean. Relationships were good, and the two states had several times declared their mutual friendship in formal alliances: in 509 BC, 348 BC and around 279 BC. There were strong commercial links. During the Pyrrhic War of 280–275 BC, against a king of Epirus who alternately fought Rome in Italy and Carthage on Sicily, Carthage provided materiel to the Romans and on at least one occasion provided its navy to ferry a Roman force. According to the classicist Richard Miles, Rome had an expansionary attitude after its conquest of southern Italy, while Carthage had a proprietary approach to Sicily. The conflict between these policies pushed the two powers to stumble into war more by accident than design. The spark that ignited the First Punic War in 264 BC was the issue of control of the independent Sicilian city state of Messana (modern Messina).