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
How much the military discipline and the martial spirit of the
burgesses suffered from this conversion of war into a traffic in
plunder, may be traced in the campaigns against Perseus; and the
spread of cowardice was manifested in a way almost scandalous during
the insignificant Istrian war (in 576).
On occasion of a trifling
skirmish magnified by rumour to gigantic dimensions, the land army
and the naval force of the Romans, and even the Italians, ran off
homeward, and Cato found it necessary to address a special reproof to
his countrymen for their cowardice. In this too the youth of quality
took precedence.
Already during the Hannibalic war (545) the censors
found occasion to visit with severe penalties the remissness of those
who were liable to military service under the equestrian census.
Towards the close of this period (574?) a decree of the people
prescribed evidence of ten years' service as a qualification for
holding any public magistracy, with a view to compel the sons of
the nobility to enter the army.