The flourishing of Carthage was accompanied by a parallel decline in the great cities of the Phoenician mother-country, in Sidon and especially in Tyre, the prosperity of which was destroyed partly by internal commotions, partly by the pressure of external calamities, particularly of its sieges by Salmanassar in the first, Nebuchodrossor in the second, and Alexander in the fifth century of Rome.  The noble families and the old firms of Tyre emigrated for the most part to the secure and flourishing daughter-city, and carried thither their intelligence, their capital, and their traditions.  At the time when the Phoenicians came into contact with Rome, Carthage was as decidedly the first of Canaanite cities as Rome was the first of the Latin communities.

Naval Power of Carthage

But the empire of Libya was only half of the power of Carthage; its maritime and colonial dominion had acquired, during the same period, a not less powerful development.

Spain

In Spain the chief station of the Phoenicians was the primitive Tyrian settlement at Gades (Cadiz).  Besides this they possessed to the west and east of it a chain of factories, and in the interior the region of the silver mines; so that they held nearly the modern Andalusia and Granada, or at least the coasts of these provinces.  They made no effort to acquire the interior from the warlike native nations; they were content with the possession of the mines and of the stations for traffic and for shell and other fisheries; and they had difficulty in maintaining their ground even in these against the adjoining tribes.  It is probable that these possessions were not properly Carthaginian but Tyrian, and Gades was not reckoned among the cities tributary to Carthage; but practically, like all the western Phoenicians, it was under Carthaginian hegemony, as is shown by the aid sent by Carthage to the Gaditani against the natives, and by the institution of Carthaginian trading settlements to the westward of Gades.  Ebusus and the Baleares, again, were occupied by the Carthaginians themselves at an early period, partly for the fisheries, partly as advanced posts against the Massiliots, with whom furious conflicts were waged from these stations.

Sardinia

In like manner the Carthaginians already at the end of the second century of Rome established themselves in Sardinia, which was utilized by them precisely in the same way as Libya.  While the natives withdrew into the mountainous interior of the island to escape from bondage as agricultural serfs, just as the Numidians in Africa withdrew to the borders of the desert, Phoenician colonies were conducted to Caralis (Cagliari) and other important points, and the fertile districts along the coast were turned to account by the introduction of Libyan cultivators.

Sicily