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
Coalition of the Italians against Rome
After the fall of the Etruscan power and the weakening of the Greek republics, the Samnite confederacy was beyond doubt, next to Rome, the most considerable power in Italy, and at the same time that which was most closely and immediately endangered by Roman encroachments. To its lot therefore fell the foremost place and the heaviest burden in the struggle for freedom and nationality which the Italians had to wage against Rome.
It might reckon upon the assistance of the small Sabellian tribes, the Vestini, Frentani, Marrucini, and other smaller cantons, who dwelt in rustic seclusion amidst their mountains, but were not deaf to the appeal of a kindred stock calling them to take up arms in defence of their common possessions.
The assistance of the Campanian Greeks and those of Magna Graecia (especially the Tarentines), and of the powerful Lucanians and Bruttians would have been of greater importance; but the negligence and supineness of the demagogues ruling in Tarentum and the entanglement of that city in the affairs of Sicily, the internal distractions of the Lucanian confederacy, and above all the deep hostility that had subsisted for centuries between the Greeks of Lower Italy and their Lucanian oppressors, scarcely permitted the hope that Tarentum and Lucania would make common cause with the Samnites.
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Reference address : http://www.ellopos.net/elpenor/rome/2-06-italians-rome.asp?pg=4