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
His campaign against the Insubres of 531, which to unprejudiced judges only showed that good! soldiers often repair the errors of bad generals,(2) was regarded by him and by his adherents as an irrefragable proof that the Romans had only to put Gaius Flaminius at the head of the army in order to make a speedy end of Hannibal.
2. Cf. III. III. The Celts Attacked in Their Own Land
Talk of this sort had procured for him his second consulship, and hopes of this sort had now brought to his camp so great a multitude of unarmed followers eager for spoil, that their number, according to the assurance of sober historians, exceeded that of the legionaries. Hannibal based his plan in part on this circumstance. So far from attacking him, he marched past him, and caused the country all around to be pillaged by the Celts who thoroughly understood plundering, and by his numerous cavalry.
The complaints and indignation of the multitude which had to submit to be plundered under the eyes of the hero who had promised to enrich them, and the protestation of the enemy that they did not believe him possessed of either the power or the resolution to undertake anything before the arrival of his colleague, could not but induce such a man to display his genius for strategy, and to give a sharp lesson to his inconsiderate and haughty foe.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/3-05-war-hannibal-cannae.asp?pg=16