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
Mithradates contented himself with complaining
to Murena and, when this was in vain, to the Roman government.
In fact commissioners from Sulla made their appearance to dissuade
the governor, but he did not submit; on the contrary he crossed
the Halys and entered on the undisputed territory of Pontus,
whereupon Mithradates resolved to repel force by force.
His general
Gordius had to detain the Roman army till the king came up with
far superior forces and compelled battle; Murena was vanquished
and with great loss driven back over the Roman frontier to Phrygia,
and the Roman garrisons were expelled from all Cappadocia. Murena
had the effrontery, no doubt, to call himself the victor and to
assume the title of -imperator- on account of these events (672);
but the sharp lesson and a second admonition from Sulla induced
him at last to push the matter no farther; the peace between
Rome and Mithradates was renewed (673).