The Romans under Gaius Cassius Longinus defended the border against these Parthian incursions successfully .
Parthian forces made a number of raids into Roman territory after the defeat of the Roman army under Crassus at the Battle of Carrhae .
The Roman under Gaius Cassius Longinus defended the border against these Parthian incursions successfully .
Parthian forces made a number of raids into Roman territory after the defeat of the Roman army under Crassus at the Battle of Carrhae .