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
The Samnite Confederacy
The Samnite land, properly so called, alone remained unaffected by these innovations, which, beautiful and natural as they may to some extent have been, powerfully contributed to relax still more the bond of national unity which even from the first was loose. Through the influence of Greek habits a deep schism took place in the Samnite stock.
The civilized "Philhellenes" of Campania were accustomed to tremble like the Greeks themselves before the ruder tribes of the mountains, who were continually penetrating into Campania and disturbing the degenerate earlier settlers. Rome was a compact state, having the strength of all Latium at its disposal; its subjects might murmur, but they obeyed.
The Samnite stock was dispersed and divided; and, while the confederacy in Samnium proper had preserved unimpaired the manners and valour of their ancestors, they were on that very account completely at variance with the other Samnite tribes and towns.
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Reference address : https://www.ellopos.net/elpenor/rome/2-05-subjugation-latins-campanians.asp?pg=29