Sicilian Wars (409-307 BC)
The Sicilian Wars were a series of conflicts fought between Carthage and the Greek city-states of Magna Grecia, headed by Syracuse, over control of Sicily between the years 480 to 307 BC. Carthage's economic successes, and its dependence on shipping to conduct most of its trade, for the empire's southern border was surrounded by desert, led to the creation of a powerful Carthaginian navy to discourage both pirates and rival nations. They had inherited their naval strength and experience from the Phoenicians, but had increased it because, unlike the Phoenicians, the Punics did not want to rely on a foreign nation's aid. This, coupled with its success and growing hegemony, brought Carthage into increasing conflict with the Greeks, the other major power contending for control of the central Mediterranean.
extract from WIKIPEDIA