At the present conjuncture, too, the number of the malcontents was swelled by the addition of the recently subdued Bactrians, who hated the Parthian yoke, and longed earnestly for a chance of recovering their freedom.

Thus when Demetrius II., anxious to escape the reproach of inertness, determined to make an expedition against the great Parthian monarch, he found himself welcomed as a deliverer by a considerable number of his enemy's subjects, whom the harshness, or the novelty, of the Parthian rule had offended.

The malcontents joined his standard as he advanced; and supported, as he thus was, by Persian, Elymsen, and Bactrian contingents, he engaged and defeated the Parthians in several battles.
Upon this, Mithridates, finding himself inferior in strength, had recourse to stratagem, and having put Demetrius off his guard by proposals of peace, attacked him, defeated him, and took him prisoner.
The invading army appears to have been destroyed.

The captive monarch was, in the first instance, conveyed about to the several nations which had revolted, and paraded before each in turn, as a proof to them of their folly in lending him aid, but afterwards he was treated in a manner befitting his rank and the high character of his captor.

Assigned a residence in Hyrcania, he was maintained in princely state, and was even promised by Mithridates the hand of his daughter, Ehodo-guns.