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
It is easy to understand how under such circumstances civilization and Romanizing rapidly spread among the natives. These Celts were not fond of agriculture; but their new masters compelled them to exchange the sword for the plough, and it is very credible that the embittered resistance of the Allobroges was provoked in part by some such injunctions. In earlier times Hellenism had also to a certain degree dominated those regions; the elements of a higher culture, the stimulus to the cultivation of the vine and the olive,(8) to the use of writing(9) and to the coining of money, came to them from Massilia.
8. Cf. IV. II. Scipio Aemilianus
9. There was found, for instance, at Vaison in the Vocontian canton an inscription written in the Celtic language with the ordinary Greek alphabet. It runs thus: --segouaros ouilloneos tooutious namausatis eiorou beileisamisosin nemeiton--. The last word means "holy."
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Reference address : https://www.ellopos.net/elpenor/rome/5-07-subjugation-west.asp?pg=10