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
Province of Narbo
The result of these military operations was the institution of a new Roman province between the maritime Alps and the Pyrenees. All the tribes between the Alps and the Rhone became dependent on the Romans and, so far as they did not pay tribute to Massilia, presumably became now tributary to Rome. In the country between the Rhone and the Pyrenees the Arverni retained freedom and were not bound to pay tribute to the Romans; but they had to cede to Rome the most southerly portion of their direct or indirect territory- the district to the south of the Cevennes as far as the Mediterranean, and the upper course of the Garonne as far as Tolosa (Toulouse).
As the primary object of these occupations was the establishment of a land communication between Italy and Spain, arrangements were made immediately thereafter for the construction of the road along the coast. For this purpose a belt of coast from the Alps to the Rhone, from 1 to 1 3/4 of a mile in breadth, was handed over to the Massiliots, who already had a series of maritime stations along this coast, with the obligation of keeping the road in proper condition; while from the Rhone to the Pyrenees the Romans themselves laid out a military highway, which obtained from its originator Ahenobarbus the name of the -Via Domitia-.
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Reference address : https://www.ellopos.net/elpenor/rome/4-05-peoples-north.asp?pg=8