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
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.