Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
But the Romans, not
inclined to restore their booty, replied with frivolous or at any rate
irrelevant complaints as to all sorts of injuries which they alleged
that the Carthaginians had inflicted on the Roman traders, and
hastened to declare war;(2) the principle, that in politics power
is the measure of right, appeared in its naked effrontery.
2. That the cession of the islands lying between Sicily and Italy,
which the peace of 513 prescribed to the Carthaginians, did not
include the cession of Sardinia is a settled point (Cf. III. II. Remarks
On the Roman Conduct of the War); but the statement, that the Romans
made that a pretext for their occupation of the island three years
after the peace, is ill attested. Had they done so, they would merely
have added a diplomatic folly to the political effrontery.