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 Treveri, through whose leader Indutiomarus the Eburones, the clients of the powerful neighbouring canton, had been chiefly induced to that so successful attack, had taken arms on the news of the disaster of Aduatuca and advanced into the territory of the Remi with the view of attacking the legion cantoned there under the command of Labienus; they too desisted for the present from continuing the struggle. Caesar not unwillingly postponed farther measures against the revolted districts till the spring, in order not to expose his troops which had suffered much to the whole severity of the Gallic winter, and with the view of only reappearing in the field when the fifteen cohorts destroyed should have been replaced in an imposing manner by the levy of thirty new cohorts which he had ordered.
The insurrection meanwhile pursued its course, although there was for the moment a suspension of arms. Its chief seats in central Gaul were, partly the districts of the Carnutes and the neighbouring Senones (about Sens), the latter of whom drove the king appointed by Caesar out of their country; partly the region of the Treveri, who invited the whole Celtic emigrants and the Germans beyond the Rhine to take part in the impending national war, and called out their whole force, with a view to advance in the spring a second time into the territory of the Remi, to capture the corps of Labienus, and to seek a communication with the insurgents on the Seine and Loire. The deputies of these three cantons remained absent from the diet convoked by Caesar in central Gaul, and thereby declared war just as openly as a part of the Belgic cantons had done by the attacks on the camps of Sabinus and Cicero.
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Reference address : https://www.ellopos.net/elpenor/rome/5-07-subjugation-west.asp?pg=103