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
At length a battle was resolved on, to put an end to the
state of embarrassment and uncertainty. In this battle the Numidian
cavalry showed itself just as superior to the Roman horse as the Roman
infantry was superior to the Phoenician foot; the infantry decided
the victory, but the losses even of the Romans were very considerable.
The result of the successful struggle was somewhat marred by the
circumstance that, after the battle, during the confusion and fatigue
of the conquerors, the beleaguered army succeeded in escaping from
the city and in reaching the fleet.
The victory was nevertheless of
importance; Agrigentum fell into the hands of the Romans, and thus the
whole island was in their power, with the exception of the maritime
fortresses, in which the Carthaginian general Hamilcar, Hanno's
successor in command, entrenched himself to the teeth, and was not to
be driven out either by force or by famine. The war was thenceforth
continued only by sallies of the Carthaginians from the Sicilian
fortresses and their descents on the Italian coasts.