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
The allies would willingly have brought
Rhegium also on the opposite coast under their power; but Rome could
not possibly pardon the Campanian garrison, and an attempt of the
combined Romans and Carthaginians to gain the city by force of arms
miscarried. The Carthaginian fleet sailed thence for Syracuse and
blockaded the city by sea, while at the same time a strong Phoenician
army began the siege by land (476). It was high time that Pyrrhus
should appear at Syracuse: but, in fact, matters in Italy were by no
means in such a condition that he and his troops could be dispensed
with there.
The two consuls of 476, Gaius Fabricius Luscinus, and
Quintus Aemilius Papus, both experienced generals, had begun the new
campaign with vigour, and although the Romans had hitherto sustained
nothing but defeat in this war, it was not they but the victors that
were weary of it and longed for peace. Pyrrhus made another attempt
to obtain accommodation on tolerable terms. The consul Fabricius had
handed over to the king a wretch, who had proposed to poison him on
condition of being well paid for it.