Ventidius learned from Crassus' errors and made sure that his forces had sufficient firepower in the form of archers and slingers, for heavy infantry by itself was vulnerable to the mobile Parthian horse-archers.
Ventidius, in order to gain time, leaked disinformation to Pacorus implying that he should cross the Euphrates River at their usual ford.
Pacorus did not trust this information and decided to cross the river much farther downstream; this was what Ventidius hoped would occur and gave him time to get his forces ready.
The Parthian cavalry's will eventually broke and panic spread, many of the horse archers being driven down the slope where they crashed into their fellows in their desperation to escape.
[4] Ventidius had anticipated that the Parthians, if defeated, would attempt to flee by the way they had come and so he had Roman infantry and cavalry lie in wait for them as they made their way back towards the Euphrates.
Ventidius, by meeting Pacorus' large army in Cyrrhestica and inflicting an overwhelming defeat on the Parthians, had succeeded in securing Rome's eastern provinces.