He presented each of the Parthian soldiers with a sum of money, and dismissed them all to their homes, at the same time seizing the opportunity to send some of his own officers, as ambassadors, to Orodes, with a request for substantial aid.

On receiving this application the Parthian monarch appears to have come to the conclusion that it was to his interest to comply with it.

Whether he made conditions, or no, is uncertain; but he seems to have sent a pretty numerous body of horse to the support of the "Liberators" against their antagonists.

Perhaps he trusted to obtain from the gratitude of Cassius what he had failed to extort from the fears of Pompey.

Or, perhaps, he was only anxious to prolong the period of civil disturbance in the Roman State, which secured his own territory from attack, and might ultimately give him an opportunity of helping himself to some portion of the Roman dominions in Asia.
The opportunity seemed to him to have arrived in B.C.40.