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
He weaned his men from fear by not unfrequently--where it could be done without serious danger--keeping his soldiers in ignorance of an approaching conflict, and allowing them to encounter the enemy unexpectedly. But obedience was on a parity with valour. The soldier was required to do what he was bidden, without asking the reason or the object; many an aimless fatigue was imposed on him solely as a training in the difficult art of blind obedience.
The discipline was strict but not harassing; it was exercised with unrelenting vigour when the soldier was in presence of the enemy; at other times, especially after victory, the reins were relaxed, and if an otherwise efficient soldier was then pleased to indulge in perfumery or to deck himself with elegant arms and the like, or even if he allowed himself to be guilty of outrages or irregularities of a very questionable kind, provided only his military duties were not immediately affected, the foolery and the crime were allowed to pass, and the general lent a deaf ear to the complaints of the provincials on such points. Mutiny on the other hand was never pardoned, either in the instigators, or even in the guilty corps itself.
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Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=4