Crassus’s campaign
As governor of Syria, Crassus crosses the Euphrates to attack Parthia. Orodes II leads another army against Armenia, preventing the hoped-for Armenian reinforcement.
Battle
Carrhae
53 BC
A heavy army becomes a target when faced with a mobile, well-supplied force.
Military history
Why is legionary cohesion not enough against cavalry that controls the distance?
In 53 BCE, Crassus invades Mesopotamia. Opposing him, Surena combines horse archers, armoured cavalry and an arrow supply train. The Romans struggle to impose close combat on a force that controls the distance. Publius Crassus’s detachment is cut off, while the main army resists until night and withdraws in fragments.
An exposed plain
The plain gives the cavalry room to manoeuvre. The challenge is to reach an opponent that can shoot and withdraw; the exact site and local conditions remain disputed.
Two systems of warfare
The Parthians do not seek to hold a fixed line. They use distance, mobility, and a shock reserve.
Military history
Sources
Indirect primary source, ancient sourcePlutarque, Vie de Crassus
Crassus 19–22 : campagne et effectifs ; 23–24 : carré et archers ; 25 : sortie et mort de Publius ; 26–31 : résistance, retraite et mort de Crassus ; 33 : bilan.
Course of events, Crassus’s decisions, and traditional loss figures.
View ↗Modern overviewPhilip Matyszak, The Enemies of Rome
Chapitre « Orodes », consacré à Rome et à la Parthie
Combat systems, terrain setting, map reconstruction, and the limitations of Roman accounts.
View ↗Ancient military historyAdrian Goldsworthy, In the Name of Rome
Passage sur Crassus et la campagne de Mésopotamie
Command, Roman formation, and political consequences.
View ↗Specialist academic synthesisA. Shapur Shahbazi, « Carrhae », Encyclopaedia Iranica
Vol. V, fasc. 1, pp. 9–13 ; sections « The invasion », « The engagement », « The retreat » et « Results ».
Checks troop strengths, Armenia’s role, combined-arms tactics and the retreat. Some reconstructions in this synthesis differ from Plutarch’s account.
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