Greek/Roman cavalry

[cunctator]

Romans also had multiple victories over the parthians even without counting Trajans and Septimus Severus campaigns.

Cassius repulsed their invasion of syria directly after carrhae and Ventidius defeated the parthians multiple times during their large scale invasion of the eastern provinces prior to Marcus Antonius failed campaigns.

After Trajans campaign, early in Marcus Aurelius reign the parthians surprisingly invaded the roman east, when they were appearently not occupied with internal struggles when the roman army was in low state of readiness and were still defeated by Lucius Verus who pursuited them deep into mesopotomia. And also during Corbulos campaign roman army did perfom quite well against them.