The Parthian and Bactrian kingdoms cannot but have trembled for their newly won independence.

Here was a young warrior who, in a single campaign, had marched the distance of a thousand miles, from the banks of the Nile to those of the Lower Euphrates, without so much as receiving a check, and who was threatening to repeat the career of Alexander.

What resistance could the little Parthian state hope to offer to such an enemy?
It must have rejoiced Tiridates to hear that while the new conqueror was gathering somewhat too hastily the fruits of victory, collecting and despatching to Egypt the most valuable works of art that he could find in the cities which he had taken, and levying heavy contributions on the submitted countries, a revolt had broken out in his own land, to quell which he was compelled to retire suddenly and to relinquish the greater part of his acquisitions.

Thus the threatened conquest proved a mere inroad, and instead of a power of greater strength replacing Syria in these regions, Syria practically retained her hold of them, but with enfeebled grasp, her strength crippled, her prestige lost, and her honor tarnished.

Ptolemy had, it is probable, not retired very long, when, encouraged by what he had seen of Syria's weakness, Tiridates took the aggressive, and invading the neighboring district of Hyrcania, succeeded in detaching it from the Syrian state, and adding it to his own territory.