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 peace which Sulla
had concluded in 670 with Mithradates, king of Pontus,(2)
and of which the treaty with Murena in 673(3) was essentially
a repetition, bore throughout the stamp of a provisional arrangement
to meet the exigencies of the moment; and the relations of the Romans
with Tigranes, king of Armenia, with whom they had de facto waged war,
remained wholly untouched in this peace.
Tigranes had with right
regarded this as a tacit permission to bring the Roman possessions
in Asia under his power. If these were not to be abandoned, it
was necessary to come to terms amicably or by force with the new
great-king of Asia.
In the preceding chapter we have described the movements
in Italy and Spain connected with the proceedings of the democracy,
and their subjugation by the senatorial government. In the present
chapter we shall review the external government, as the authorities
installed by Sulla conducted or failed to conduct it.