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
If patriotism and despair had induced the heads of the Celtic nobility to conspire, fear and self-defence now drove the conspirators to strike. In the winter of 700-701, with the exception of a legion stationed in Brittany and a second in the very unsettled canton of the Carnutes (near Chartres), the whole Roman army numbering six legions was encamped in the Belgic territory. The scantiness of the supplies of grain had induced Caesar to station his troops farther apart than he was otherwise wont to do--in six different camps constructed in the cantons of the Bellovaci, Ambiani, Morini, Nervii, Remi, and Eburones.
The fixed camp placed farthest towards the east in the territory of the Eburones, probably not far from the later Aduatuca (the modern Tongern), the strongest of all, consisting of a legion under one of the most respected of Caesar's leaders of division, Quintus Titurius Sabinus, besides different detachments led by the brave Lucius Aurunculeius Cotta(43) and amounting together to the strength of half a legion, found itself all of a sudden surrounded by the general levy of the Eburones under the kings Ambiorix and Catuvolcus.
43. That Cotta, although not lieutenant-general of Sabinus, but like him legate, was yet the younger and less esteemed general and was probably directed in the event of a difference to yield, may be inferred both from the earlier services of Sabinus and from the fact that, where the two are named together (iv. 22, 38; v. 24, 26, 52; vi. 32; otherwise in vi. 37) Sabinus regularly takes precedence, as also from the narrative of the catastrophe itself. Besides we cannot possibly suppose that Caesar should have placed over a camp two officers with equal authority, and have made no arrangement at all for the case of a difference of opinion. the five cohorts are not counted as part of a legion (comp. vi. 32, 33) any more than the twelve cohorts at the Rhine bridge (vi. 29, comp. 32, 33), and appear to have consisted of detachments of other portions of the army, which had been assigned to reinforce this camp situated nearest to the Germans.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/5-07-subjugation-west.asp?pg=98