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
A more favourable
moment could hardly be hoped for, and after all it was always
better to declare war than to let it be declared against him.
In 679 Nicomedes III Philopator king of Bithynia, died, and as
the last of his race--for a son borne by Nysa was, or was said
to be, illegitimate--left his kingdom by testament to the Romans,
who delayed not to take possession of this region bordering
on the Roman province and long ago filled with Roman officials
and merchants. At the same time Cyrene, which had been already
bequeathed to the Romans in 658,(10) was at length constituted
a province, and a Roman governor was sent thither (679).
These
measures, in connection with the attacks carried out about
the same time against the pirates on the south coast of Asia Minor,
must have excited apprehensions in the king; the annexation of Bithynia
in particular made the Romans immediate neighbours of the Pontic
kingdom; and this, it may be presumed, turned the scale. The king
took the decisive step and declared war against the Romans
in the winter of 679-680.