Persian Cavalry Across the Dynasties: From the Achaemenid Horse Archers to the Sasanian Cataphracts
At the funeral of a Median nobleman buried at Marlik in the late second millennium BCE — centuries before Cyrus the Great was born — a horse was laid in the grave with the body. The horse had a bronze bit. The bridle cheekpieces were decorated with the goddess in relief. That single burial, of which there are dozens of variants in the cemeteries of northwestern Iran, gives us the older truth the Greek sources obscure: the mounted warrior was already the central figure of Iranian elite culture in the Bronze Age. The cavalry tradition of the Persian empires is not, in any meaningful sense, an “Achaemenid” invention. It is a tradition that the Achaemenids inherited, refined, and made globally visible, and that the Parthians and Sasanians carried forward for another thousand years.
I want to write about that long arc. It runs from the Median heavy horse of the seventh century BCE, through the Achaemenid light horse archer of Cyrus and Darius, through the Parthian horse archer and cataphract of Crassus’ catastrophe at Carrhae, to the Sasanian savārān of the fourth through seventh centuries CE. The standard works in English are A. D. H. Bivar’s chapter in the Cambridge History of Iran, vol. III (1983), still the most thorough treatment of the Parthian army; Klaus Schippmann’s article on the Sasanian army in the Encyclopaedia Iranica; Kaveh Farrokh’s Shadows in the Desert (2007), a single-volume treatment aimed at a general reader; and, for the Hellenistic transition, the relevant chapters in Briant’s From Cyrus to Alexander (2002) and its sequel volume on the post-Achaemenid world. The wider context is in the Persian Military and Warfare survey.
The Nisaean horse and the Median stud
The Nisaean horse of the Median heartland is the first named breed in the Iranian cavalry tradition. The Nisaean plain, south of modern Tehran, was the imperial stud of the Median kingdom and of the Achaemenid successor state. Strabo (XI.13.7) reports that the Achaemenid court maintained 50,000 Nisaean mares at the imperial stud — the figure is implausible, but the existence of an imperial stud of substantial size is not in doubt. The Nisaean was a tall, light, fast horse, well suited to the mounted archer’s work. Xenophon, who saw the Achaemenid stud at first hand in the Hipparchicus, praises the Nisaean specifically for its endurance. The Achaemenid state maintained a parallel stud system in Parthia, Bactria, and Armenia, drawing on the great horse-breeding regions of the Iranian plateau and Central Asia.
The Median kingdom, with its capital at Ecbatana, was already a cavalry power of the first order in the ninth to seventh centuries BCE. The Median contribution to the destruction of the Assyrian Empire in 612 BCE was substantially cavalry; the Median-Babylonian alliance that took Nineveh was, in the technical sense, a triumph of the mounted archer supported by the Babylonian heavy infantry. Herodotus is right about the outcome and is unreliable about the proportions; the Median contribution was decisive but was probably closer to a third of the allied force than the dominant share.
The Achaemenid rider
The Persian nobleman of the Achaemenid reliefs is a horseman. The Apadana staircase at Persepolis shows representatives of the Persian and Median noble families leading their horses in the procession of tribute bearers. The visual message is unambiguous: the Achaemenid aristocrat is a mounted warrior. The Persian of the reliefs wears a long cloak, carries a quiver, and sometimes wears a tasselled fillet on the brow. The Median wears a long outer robe and a more ornate cap. Both are mounted.
Achaemenid cavalry was predominantly light: composite recurve bow, javelin, short sword. The Persians and Medes were famous as horse archers. The heavy cavalry of the empire was concentrated in the noble regiments that served as the strategic reserve, and the Achaemenid kataphraktos — the mailed cavalryman — was a minority of the force. The funerary stele of a certain Artagerses, c. 350 BCE, shows a fully armoured rider with a kontos-like lance, and a few other reliefs show scale armour on horses, but the heavy cavalry of the Achaemenid army was not the mailed phalanx of the later Parthian and Sasanian periods. The Persian way of battle was mobility, missile fire, and the use of terrain.
The Parthian shot — the controlled backward fire of arrows from a retreating horse — was, in fact, an Achaemenid technique that long predated the Parthians. Xenophon, who served as a mercenary in Persian service, gives detailed instructions for mounted archery in the Hipparchicus, and the Greek sources remark on Persian skill at the technique. The Sasanian horse archer and the Parthian horse archer inherited an Achaemenid drill, not an Arsacid invention.
The Parthian revolution
The Parthian revolution of the third to second centuries BCE, in which the Iranian peoples of the northeast overthrew the Seleucid empire and established a new Iranian state, marked a decisive shift in the Persian cavalry tradition. The Parthian spāh was built around two complementary units: the cataphract and the horse archer. The two worked together. The cataphracts, encased in scale or lamellar armour, mounted on armoured horses, and armed with the heavy kontos lance, held the centre and delivered the shock action. The horse archers, lightly equipped, enveloped the enemy, delivered a continuous fire of arrows, and feigned retreat in order to draw the enemy into a pursuit that broke their formation.
The Parthian cataphract was the supreme shock cavalryman of the Hellenistic Mediterranean. The Sasanian cataphract, in turn, refined the type still further, and the Sasanian savārān — heavy cavalry, fully armoured, armed with the heavy lance, the mace, the bow, and the long sword — dominated the Roman-Persian frontier for four centuries. The Sasanian cataphracts helped defeat the Roman army whose emperor Valerian was captured at the Battle of Edessa in 260 CE, and they continued to dominate the field against Rome and Byzantium until the Arab conquest. The Byzantine defeat at Callinicum in 531 CE, on the Euphrates, was a defeat of Belisarius by the Sasanian general Azarethes — a useful corrective to the older literature that treated Belisarius as invincible.
What the Sasanian harness actually was
The Sasanian cataphract harness, as preserved in the surviving Iranian and Russian museum pieces and in the rock reliefs at Taq-e Bostan, was a harness of scale and lamellar, not of plate. Full plate armour is anachronistic for the Sasanian period, and the surviving evidence and the iconography of the rock reliefs show scale and lamellar rather than plate. The harness covered both rider and horse: a headpiece for the horse, neck defences, scale chest and flank, and a crinet of scale or lamellar hanging from the neck. The rider wore a scale cuirass, a helmet (often with a face guard and aventail of mail), and carried the heavy lance couched under the arm, the bow in a case, a sword, and a mace.
The four-horned Sasanian saddle, a high-cantled wooden frame, is an Iranian development whose pre-Sasanian origins are debated. The saddle was adopted, with variations, by the Byzantines and by the early Islamic armies, and it became the model for the medieval European war saddle. The four horns — two in front, two behind — held the rider in place during the shock of contact and gave the lance the rigid base it needed. Sasanian veterinary officers were attached to each regiment; the Sasanian logistical system included a permanent corps of farriers, grooms, and saddle-makers, and the aspakān — the royal stud farms in Azerbaijan, the Caspian provinces, and Khuzistan — produced the remounts.
The Parthian shot and the myth of the technique
The Parthian shot in the popular imagination is the trick of firing arrows backwards from a galloping horse. In practice it was a controlled fire to the rear from a turned torso, executed at a gallop or a canter, and it required long training and exceptional horsemanship. The technique was known to the Achaemenid cavalry, was used at scale by the Parthian horse archers, and was used in its most refined form by the Sasanians. The Greek and Roman sources, when they describe the Parthian shot, are usually describing a Sasanian or late-Parthian drill; the early-Parthian reports are thinner and more equivocal.
The Parthian horse archers fought at Carrhae in 53 BCE, where the Roman legions of Crassus were destroyed by a combination of cataphract shock and horse-archer fire. Plutarch’s account, written more than a century later, gives the Roman force at seven legions — about 40,000 men — and the Parthian horse archers at perhaps 10,000. The numbers are inflated in both directions; modern estimates for the Parthians run from 8,000 to 12,000, and Crassus probably had closer to 35,000 effectives. The disproportion is what matters. Light horse archers, picking their distance, emptied the Roman formation. Then the cataphracts finished what the arrows had begun.
The wider arc
The Persian cavalry tradition did not die with the Sasanian state. The Sasanian heavy cavalry passed into the early Islamic armies, particularly those of Khorasan, and the Persian military vocabulary survived in Arabic, Turkish, and Mongol armies for many centuries. The Daylamites of the Caspian, the Kurds, the Lurs, and other Iranian peoples preserved the military traditions of the Sasanian highlands into the Islamic period. The Buyid, Samanid, and Seljuk dynasties that revived Persian power in the medieval Islamic world did so in part by re-creating the Persian model of a multi-ethnic empire organised around heavy cavalry and the loyalty of the Iranian heartland. The Mongol conquest of the Khwarezmian Empire in the 1220s ended the line in the strict sense, but the furusiyya — the Persian and Arabic tradition of horsemanship, lance, and sword — remained a feature of Islamic culture into the early modern period.
Sources worth reading
A. D. H. Bivar, “The Political History of Iran under the Arsacids,” in The Cambridge History of Iran, vol. III (1983). The Parthian army in detail.
Klaus Schippmann, “Army, iii. Sasanian,” in Encyclopaedia Iranica. The Sasanian army in detail; the standard reference.
Kaveh Farrokh, Shadows in the Desert: Ancient Persia at War (2007). Single-volume, accessible, useful for the general reader.
Pierre Briant, From Cyrus to Alexander (2002) and his second volume on the post-Achaemenid period. The administrative and military history.