Of the circumstances of this war, and its results, we have scarcely any knowledge.

Justin, who alone distinctly mentions it, gives us no details.

A notice, however, in Strabo, which must refer to about this time, is thought to indicate with sufficient clearness the result of the struggle, which seems to have been unfavorable to the Armenians.

Strabo says that Tigranes, before his accession to the throne, was for a time a hostage among the Parthians.

As hostages are only given by the vanquished party, we may assume that Ortoadistus (Ardashes) found himself unable to offer an effectual resistance to the Parthian king, and consented after a while to a disadvantageous peace, for his observance of which hostages were required by the victor.
It cannot have been more than a few years after the termination of this war, which must have taken place towards the close of the second, or soon after the beginning of the first century, that Parthia was for the first time brought into contact with Rome.
The Great Republic, which after her complete victory over Antiochus III., B.C.190, had declined to take possession of a single foot of ground in Asia, regarding the general state of affairs as not then ripe for an advance of Terminus in that quarter, had now for some time seen reason to alter its policy, and to aim at adding to its European an extensive Asiatic dominion.