The reign of Mithridates I. is the most important in the Parthian history. [PLATE 1. Fig. 3.] Receiving from his brother Phraates a kingdom of but narrow dimensions, confined (as it would seem) between the city of Charax on the one side, and the river Arius, or Hori-rud, on the other, he transformed it, within the space of thirty-seven years (which was the time that his reign lasted), into a great and nourishing Empire. It is not too much to say that, but for him, Parthia might have remained a more petty State on the outskirts of the Syrian kingdom, and, instead of becoming a rival to Rome, might have sunk shortly into obscurity and insignificance.
As commonly happens in the grand changes which constitute the turning-points of history, the way for Mithridates’s vast successes was prepared by a long train of antecedent circumstances. To show how the rise of the Parthians to greatness in the middle of the second century before our era was rendered possible, we must turn aside once more from our proper subject and cast a glance at the condition of the two kingdoms between which Parthia stood, at the time when Mithridates ascended the throne.
The Bactrian monarchs in their ambitious struggles to possess themselves of the tracts south of the Paropamisus, and extending from the Heri-rud to the Sutlej and the mouths of the Indus, overstrained the strength of their State, and by shifting the centre of its power injured irretrievably its principle of cohesion. As early as the reign of Demetrius a tendency to disruption showed itself, Eucratidas having held the supreme power for many years in Bactria itself, while Demetrius exercised authority on the southern side of the mountains. It is true that at the death of Demetrius this tendency was to a certain extent checked, since Eucratidas was then able to extend his sway over almost the whole of the Bactrian territory. But the old evil recurred shortly, though in a less pronounced form. Eucratidas, without being actually supplanted in the north by a rival, found that he could devote to that portion of the Empire but a small part of his attention. The southern countries and the prospect of southern and eastern conquests engrossed him. While he carried on successful wars with the Arachotians, the Drangians, and the Indians of the Punjaub region, his hold on the more northern countries was relaxed, and they began to slip from his grasp. Incursions of the nomad Scyths from the Steppes carried fire and sword over portions of these provinces, some of which were Even, it is probable, seized and occupied by the invaders.
Such was, it would seem, the condition of Bactria under Eucratidas, the contemporary of Mithridates. In Syria, Antiochus Epiphanes had succeeded his brother Seleucus IV. (Philopator) about a year before Mithridates ascended the Parthian throne. He was a prince of courage and energy; but his hands were fully occupied with wars in Egypt, Palestine, and Armenia, and the distant East could attract but a small share of his thought or attention. The claim put forward by Egypt to the possession of Coele-Syria and Palestine, promised to Ptolemy V. (it was affirmed) as a dowry with Cleopatra, the daughter of Antiochus the Great, led to hostilities in the south-west which lasted continuously for four years (B.C. 171 to B.C. 168), and were complicated during two of them with troubles in Judaea, rashly provoked by the Syrian monarch, who, unaware of the stubborn temper of the Jews, goaded them into insurrection. The war with Egypt came to an end in B.C. 168; it brought Syria no advantage, since Rome interposed, and required the restitution of all conquests. The war with the Jews had no such rapid termination. Antiochus, having not only plundered and desecrated the Temple, but having set himself to eradicate utterly the Jewish religion, and completely Hellenize the people, was met with the most determined resistance on the part of a moiety of the nation. A patriotic party rose up under devoted leaders, who asserted, and in the end secured, the independence of their country. Not alone during the remaining years of Epiphanes, but for half a century after his death, throughout seven reigns, the struggle continued; Judaea taking advantage of every trouble and difficulty in Syria to detach herself more and more completely from her oppressor; being a continual thorn in her side, a constant source of weakness, preventing more than anything else the recovery of her power. The triumph which Epiphanes obtained in the distant Armenia (B.C. 166-5), where he defeated and captured the king, Artaxias, was a poor set-off against the foe which he had created to himself at his doors through his cruelty and intolerance.
In another quarter, too, the Syrian power received a severe shake through the injudicious violence of Epiphanes. The Oriental temples had, in some instances, escaped the rapacity of Alexander’s generals and “Successors;” their treasuries remained unviolated, and contained large hoards of the precious metals. Epiphanes, having exhausted his own exchequer by his wars and his lavish gifts, saw in these un-plundered stores a means of replenishing it, and made a journey into his south-eastern provinces for the purpose. The natives of Elymais, however, resisted his attempt, and proved strong enough to defeat it; the baffled monarch retired to Tabae, where he shortly afterward fell sick and died. In the popular belief his death was a judgment upon him for his attempted sacrilege; and in the exultation caused by the event the bands which joined these provinces to the Empire must undoubtedly have been loosened.
Nor did the removal of Epiphanes (B.C. 164) improve the condition of affairs in Syria. The throne fell to his son, Antiochus Eupator, a boy of nine, according to Appian, or, according to another authority, of twelve years of age. The regent, Lysias, exercised the chief power, and was soon engaged in a war with the Jews, whom the death of Epiphanes had encouraged to fresh efforts. The authority of Lysias was further disputed by a certain Philip, whom Epiphanes, shortly before his death, had made tutor to the young king. The claims of this tutor to the regent’s office being supported by a considerable portion of the army, a civil war arose between him and Lysias, which raged for the greater part of two years (B.C. 163-2), terminating in the defeat and death of Philip. But Syrian affairs did not even then settle down into tranquillity. A prince of the Seleucid house, Demetrius by name, the son of Seleucus IV., and consequently the first cousin of Eupator, was at this time detained in Rome as a hostage, having been sent there during his father’s lifetime as a security for his fidelity. Demetrius, with some reason, regarded his claim to the Syrian throne as better than that of his cousin, the son of the younger brother, and being in the full vigor of early youth, he determined to assert his pretensions in Syria, and to make a bold stroke for the crown. Having failed to obtain the Senate’s consent to his quitting Italy, he took his departure secretly, crossed the Mediterranean in a Carthaginian vessel, and, landing in Asia, succeeded within a few months in establishing himself as Syrian monarch.
From this review it sufficiently appears that the condition of things, both in Syria and Bactria, was favorable to any aspirations which the power that lay between them might entertain after dominion and self-aggrandizement. The Syrian and Bactrian kings, at the time of Mithridates’s accession, were, both of them, men of talent and energy; but the Syrian monarch was soon involved in difficulties at home, while the Bactrian had his attention attracted to prospects of advantage in a remote quarter, Mithridates might, perhaps, have attacked the territory of either with an equal chance of victory; and as his predecessor had set him the example of successful warfare on his western frontier, we might have expected his first efforts to have been in this direction, against the dependencies of Syria. But circumstances which we cannot exactly trace determined his choice differently. While Eucratidas was entangled in his Indian wars, Mithridates invaded the Bactrian territory where it adjoined Parthia, and added to his Empire, after a short struggle, two provinces, called respectively Turiua and that of Aspionus. It is conjectured that these provinces lay towards the north and the north-west, the one being that of the Turanians proper, and the other that of the Aspasiacae, who dwelt between the Jaxartes and the Oxus. But there is scarcely sufficient ground for forming even a conjecture on the subject, since speculation has nothing but the names themselves to rest upon.
Successful in this quarter, Mithridates, a few years later, having waited until the Syrian throne was occupied by the boy Eupator, and the two claimants of the regency, Lysias and Philip, were contending in arms for the supreme power, made suddenly an expedition towards the west, falling upon Media, which, though claimed by the Syrian kings as a province of their Empire, was perhaps at this time almost, if not quite, independent. The Medes offered a vigorous resistance to his attack; and, in the war which followed, each side had in turn the advantage; but eventually the Parthian prince proved victorious, and the great and valuable province of Media Magna was added to the dominons of the Arsacidae. A certain Bacasis was appointed to govern it, whether as satrap or as tributary monarch is not apparent; while the Parthian king, recalled towards home by a revolt, proceeded to crush rebellion before resuming his career of conquest.