Final answer:
Rome won the First Punic War, which led them to annex Sicily, as well as take control of Corsica and Sardinia, thereby expanding their influence over the Mediterranean.
Step-by-step explanation:
The victor of the First Punic War was Rome. The war, which lasted from 264 to 241 BCE, concluded with Carthage suffering a devastating defeat. Despite their formidable naval power, Carthage was outmaneuvered by the Romans, who used a clever tactic of transforming naval battles into land-based conflicts where Roman military prowess was unmatched. The end of the war saw Carthage being compelled to sue for peace and relinquish their claim to Sicily. Beyond just the annexation of Sicily, Rome also took control of Corsica and Sardinia, dealing a significant blow to Carthaginian authority in the region.