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
Their object seemed to be attained; but even now to those who saw
more clearly the enterprise could not but appear a failure. The cause
of the failure lay mainly in the awkward alliance between a politically
incapable general and a street-demagogue, capable but recklessly
violent, and filled with passion rather than with the aims of a
statesman. They had agreed excellently, so long as the question related
only to plans.
But when the plans came to be executed, it was very soon
apparent that the celebrated general was in politics utterly incapable;
that his ambition was that of the farmer who would cope with and,
if possible, surpass the aristocrats in titles, and not that of the
statesman who desires to govern because he feels within him the power
to do so; that every enterprise, which was based on his personal standing
as a politician, must necessarily even under the most favourable
circumstances be ruined by himself.