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 Romans Cross the Eastern Alps and Reach the Danube
The expedition of the consul of 639, Marcus Aemilius Scaurus, against the Taurisci(12) presented more the character of a war of conquest.
12. They are called in the Triumphal Fasti -Galli Karni-; and in Victor -Ligures Taurisci- (for such should be the reading instead of the received -Ligures et Caurisci-).
He was the first of the Romans to cross the chain of the eastern Alps where it falls lowest between Trieste and Laybach, and contracted hospitable relations with the Taurisci; which secured a not unimportant commercial intercourse without involving the Romans, as a formal subjugation would have involved them, in the movements of the peoples to the north of the Alps.
Of the conflicts with the Scordisci, which have passed almost wholly into oblivion, a page, which speaks clearly even in its isolation, has recently been brought to light through a memorial stone from the year 636 lately discovered in the neighbourhood of Thessalonica.
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Reference address : https://www.ellopos.net/elpenor/rome/4-05-peoples-north.asp?pg=21