nce they maintained
communication with Africa by means of Motya and afterwards of
Lilybaeum and with Sardinia by means of Panormus and Soluntum.
The interior of the island remained in the possession of the natives,
the Elymi, Sicani, and Siceli. After the further advance of the
Greeks was checked, a state of comparative peace had prevailed in
the island, which even the campaign undertaken by the Carthaginians
at the instigation of the Persians against their Greek neighbours on
the island (274) did not permanently interrupt, and which continued
on the whole to subsist till the Attic expedition to Sicily (339-341).
The two competing nations made up their minds to tolerate each other,
and confined themselves in the main each to its own field.

Maritime Supremacy
Rivalry with Syracuse

All these settlements and possessions were important enough in
themselves; but they were of still greater moment, inasmuch as they
became the pillars of the Carthaginian maritime supremacy. By their
possession of the south of Spain, of the Baleares, of Sardinia, of
western Sicily and Melita, and by their prevention of Hellenic
colonies on the east coast of Spain, in Corsica, and in the region of
the Syrtes, the masters of the north coast of Africa rendered their
sea a closed one, and monopolized the western straits. In the
Tyrrhene and Gallic seas alone the Phoenicians were obliged to
admit the rivalry of other nations. This state of things might
perhaps be endured, so long as the Etruscans and the Greeks served
to counterbalance each other in these waters; with the former, as the
less dangerous rivals, Carthage even entered into an alliance against
the Greeks. But when, on the fall of the Etruscan power--a fall
which, as is usually the case in such forced alliances, Carthage had
hardly exerted all her power to avert--and after the miscarriage of
the great projects of Alcibiades, Syracuse stood forth as indisputably
the first Greek naval power, not only did the rulers of Syracuse
naturally begin to aspire to dominion over Sicily and lower Italy
and at the same time over the Tyrrhene and Adriatic seas, but the
Carthaginians also were compelled to adopt a more energetic policy.
The immediate result of the long and obstinate conflicts between
them and their equally powerful and infamous antagonist, Dionysius
of Syracuse (348-389), was the annihilation or weakening of the
intervening Sicilian states--a result which both parties had an
in