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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Embarkation of Pyrrhus for Sicily-- The War in Italy Flags
By the departure of Pyrrhus the hands of the Romans were set free in Italy; none ventured to oppose them in the open field, and their antagonists everywhere confined themselves to their fastnesses or their forests. The struggle however was not terminated so rapidly as might have been expected; partly in consequence of its nature as a warfare of mountain skirmishes and sieges, partly also, doubtless, from the exhaustion of the Romans, whose fearful losses are indicated by a decrease of 17,000 in the burgess-roll from 473 to 479.
In 476 the consul Gaius Fabricius succeeded in inducing the considerable Tarentine settlement of Heraclea to enter into a separate peace, which was granted to it on the most favourable terms. In the campaign of 477 a desultory warfare was carried on in Samnium, where an attack thoughtlessly made on some entrenched heights cost the Romans many lives, and thereafter in southern Italy, where the Lucanians and Bruttians were defeated.
On the other hand Milo, issuing from Tarentum, anticipated the Romans in their attempt to surprise Croton: whereupon the Epirot garrison made even a successful sortie against the besieging army. At length, however, the consul succeeded by a stratagem in inducing it to march forth, and in possessing himself of the undefended town (477).
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Reference address : https://www.ellopos.net/elpenor/rome/2-07-pyrrhus-rome-italy.asp?pg=41