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
No one can deny
that he possessed sagacity and resolution, but these were, in a
singular manner, combined with procrastination and supineness; which
is perhaps partly to be explained by the fact, that he was called in
his eighteenth year to the position of an absolute sovereign, and that
his ungovernable fury against every one who disturbed his autocratic
course by counter-argument or counter-advice scared away from him all
independent counsellors.
What various causes cooperated to produce
the weak and disgraceful management which he showed in the first
Macedonian war, we cannot tell; it may have been due perhaps to that
indolent arrogance which only puts forth its full energies against
danger when it becomes imminent, or perhaps to his indifference
towards a plan which was not of his own devising and his jealousy of
the greatness of Hannibal which put him to shame.
It is certain that
his subsequent conduct betrayed no further trace of the Philip,
through whose negligence the plan of Hannibal suffered shipwreck.