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
The protectorate of Rome over the provinces
consisted essentially in military guardianship; the provincials
paid tax or tribute to the Romans for their defence by sea and land,
which was concentrated in Roman hands. But never, perhaps,
did a guardian more shamelessly defraud his ward than the Roman
oligarchy defrauded the subject communities. Instead of Rome equipping
a general fleet for the empire and centralizing her marine police,
the senate permitted the unity of her maritime superintendence--
without which in this matter nothing could at all be done--to fall
into abeyance, and left it to each governor and each client state
to defend themselves against the pirates as each chose and was able.
