Crassus now hoped that his legionaries could hold out until the Parthians ran out of arrows.[28] However, Surena used thousands of camels to resupply his horse archers. Upon realizing this, Crassus dispatched his son Publius with 1,300 Gallic cavalry, 500 archers and eight cohorts of legionaries to drive off the horse archers. The horse archers feigned retreat, drawing off Publius' force who suffered heavy casualties from arrow fire.