Mithridates II, the Great, his son and successor, was the restorer of the empire. We are briefly told that he valiantly waged many wars with his neighbours, added many nations to the empire, and had several successes against the Scythians, so avenging the disgrace of his predecessors. His successes, however, must have been practically limited to the recovery of lost ground, and the eastern frontier was not advanced. It has been common to connect with his successes the appearance of Parthian names among the Indo-Scythian princes of the Kabul valley; but this must be false. On the other hand, Mithridates, if not the first to conquer Mesopotamia, was the first to fix the Euphrates as the western boundary of the empire, and towards the end of his reign he was strong enough to interfere with the concerns of Great Armenia and place Tigranes II on the throne in a time of disputed succession (94 B.C.), accepting in return the cession of seventy Armenian valleys. FIRST CONFLICT WITH ROME Now, too, the Parthians, as lords of Mesopotamia, came for the first time into contact with Rome, and in 92 B.C., when Sulla came to Cappadocia as proprætor of Cilicia, he met on the Euphrates the ambassador of Mithridates seeking the Roman alliance. This embassy was no doubt connected with the Parthian schemes against Syria. Demetrius III, the Seleucid, who reigned at Damascus, was compelled to surrender with his whole army and ended his life as a captive at the Parthian court. Mithridates the Great seems to have died just after this event; there is no reason to suppose that he lived to see the disasters which followed so close on his great successes. [Sidenote: [64-53 B.C.]]