←  The Restricted Section

Volume VI · 527 to 565

Justinian’s Wars

Justinian ruled the Eastern Roman Empire from 527 to 565, and spent most of those years at war. This volume follows the three wars his historian Procopius wrote about, one to a tab, in the order he wrote them. This is the first: the long war with Persia that Justinian inherited when he took the throne, broken by a peace he bought and Persia broke, and ended by the Fifty Years’ Peace of 562. What the Empire did is on the left, and what Persia did is on the right. What anyone else did, or what both sides agreed together, is down the middle. A card’s side says who acted, never who was right.

Began
527
Ended
562
Events
28, on 28 cards
Chief witness
Procopius, who was at Dara

Chronological View

    1. Before 527

      Background. Rome and Persia had fought on and off for three hundred years. These are the quarrels Justinian inherited. The war starts at the solid line below.

    2. 502–506

      Kavadh’s war with Rome

      Kavadh, king of Persia, invades the Roman east and takes Amida after a long siege. The war ends with a truce, and the emperor Anastasius builds a great fortress at Dara, a few miles from the Persian frontier city of Nisibis.

      Kavadh gave back what he had taken in exchange for a large payment, the Encyclopaedia Iranica says, because a new wave of Hephthalite nomads was threatening his northern frontier.

      The Persians protested that Dara broke the old treaties, which forbade new forts on the frontier. It was a sore point for thirty years.

      Procopius, Wars 1.7.1–35 · Wars 1.10.13–19 · Bury, vol. 2, p. 10 · Encyclopaedia Iranica, “Byzantine-Iranian Relations”

    3. c. 525

      A king asks the emperor to adopt his son

      Kavadh asks Emperor Justin to adopt his son Khosrow, to secure his succession. Justin’s minister Proclus warns that an adopted son could claim the Empire itself, Justin offers only a lesser kind of adoption, and the talks end in bad blood.

    4. 526

      The Iberian king turns to Rome

      Gourgenes, the Christian king of Iberia in the Caucasus, refuses Persian demands that his people follow Zoroastrian custom and stop burying their dead, and asks Justin for help. Persia invades Iberia, the Romans send too little too late, and the war begins.

  1. Aug 1, 527

    Where this war starts

    Emperor Justin dies, and his nephew Justinian, who has shared the throne with him since April, rules alone. He inherits a war with Persia over Iberia and the frontier forts, and gives a young officer of his guard, Belisarius, his first command in it.

    Left column What the Empire did

    The Eastern Roman Empire

    Ruled from Constantinople by Justinian. Historians today call it the Byzantine Empire.

    Its people called themselves Romans, and their state the Roman Empire. Byzantine is a name historians gave it long afterward. Its eastern frontier ran from the Black Sea to the Syrian desert, through Armenia and Mesopotamia.

    The cards on this side are the acts of the emperor Justinian, of his generals, Belisarius above all, and of his armies and envoys. Rome’s Arab allies, the Ghassanid kings, fought on its side.

    A card on this side names who acted. It never means every Roman.

    Right column What Persia did

    Persia

    The Sasanian Empire, ruled from Ctesiphon by Kavadh and then Khosrow I

    The Sasanian kings had ruled Persia, modern Iran and Iraq, since 224, and their empire was the only power the Romans thought of as their equal. Its kings held the old Iranian faith, the Zoroastrian one, and ruled Christians and Jews as well.

    The cards on this side are the acts of its kings, Kavadh and then Khosrow I, of their generals and armies, and of their Arab allies, the Lakhmid kings.

    No history written by a Persian at the time survives, and Khosrow’s words come down through Roman writers. The drawers quote the Encyclopaedia Iranica, a reference work of Iranian studies, where it reads events differently from Procopius. A card names who acted. It never means every Persian.

  2. 527 to 532 The war Justinian inherited

    The first war

    527 to 532. Belisarius loses his first battle, wins the next at Dara and loses again at Callinicum, and Persia’s new king makes peace.

  3. 528

    A fort that is never finished

    Ordered to build a new fort near Dara, Belisarius and the other commanders are attacked by a Persian army of 30,000 while the work is going on. The Romans are routed, and the fort is never finished.

  4. Jun 530

    Belisarius wins at Dara

    A Persian army of 40,000 comes up to Dara. Belisarius, about twenty-five, meets it with 25,000 men behind a line of trenches, and his Hun horsemen catch the Persians from the side. It is the Empire’s first great victory over Persia in generations.

    Before the battle, the Persian commander sent word to Belisarius to “make ready the bath,” since he meant to bathe in Dara the next day, and later wrote again: “let the bath and lunch be in readiness for me within the fortifications.” Procopius says the Romans killed about 5,000 Persians in the rout.

    Procopius, Wars 1.13.9–39 · Wars 1.13.17 · Wars 1.14.1–55 · Wars 1.14.51 · Bury, vol. 2, p. 82 · Britannica, “Belisarius”

  5. 530

    A second victory, in Armenia

    In Armenia, the Roman general Sittas beats a Persian army of 30,000, twice the size of his own, at Satala.

  6. Apr 531

    Callinicum: a defeat on the eve of Easter

    A Persian army and its Arab allies strike up the Euphrates toward Antioch. Belisarius follows, and his men, fasting for Easter, force him into battle. It is lost, and soon afterward Belisarius is called home and given the war against the Vandals.

    Procopius says the soldiers taunted Belisarius as a coward until he gave in. Al-Mundhir, king of the Lakhmid Arabs, was Persia’s ally, and the Ghassanid Arabs under al-Harith fought for Rome.

    Procopius, Wars 1.17.1–48 · Wars 1.18.1–56 · Bury, vol. 2, p. 85 · p. 86

  7. Sept 13, 531

    Khosrow becomes king

    Kavadh dies, and his son Khosrow takes the throne ahead of his older brother, as his father had wished and with the backing of the great nobles. He will rule Persia until 579, and puts his brothers to death.

    Persians remember him as Anushirvan, and Britannica sums up the memory: “a great reformer and patron of the arts and scholarship.” He reformed Persia’s taxes and its army. To the Romans he was the king who sacked Antioch. Both are on this tab.

    Procopius, Wars 1.21.17–22 · Bury, vol. 2, p. 88 · Britannica, “Khosrow I” · Encyclopaedia Iranica, “Byzantine-Iranian Relations”

  8. Jan 13–18, 532

    The Nika riot nearly ends Justinian’s reign

    The Blues and the Greens, the rival fans of the chariot races, unite against the government, crying “Nika,” “Conquer.” They burn the center of Constantinople and crown a rival emperor, until Belisarius traps the crowd in the Hippodrome and kills more than 30,000.

    Justinian was ready to flee by sea. Procopius gives Theodora a speech that kept him: she would not leave, she said, for “royalty is a good burial-shroud.”

    The church Justinian built to replace Hagia Sophia still stands in Istanbul. Procopius tells the riot in his first book on the Persian war, and it is here for that reason.

    The fire destroyed the old church of Hagia Sophia. The rioters had crowned Hypatius, a nephew of the emperor Anastasius, and the soldiers killed him the next day and threw his body into the sea.

    Procopius, Wars 1.24.1–58 · Wars 1.24.33–37 · Wars 1.24.54 · Bury, vol. 2, p. 40 · p. 41 · p. 44 · Procopius, Wars 1.24.56

  9. 532 Disputed

    The “Endless Peace”

    Justinian and Khosrow make a peace “without end.” Rome pays 110 centenaria, 11,000 pounds of gold, and moves its army’s headquarters away from Dara, and the forts each side had taken in the Caucasus are handed back. The army is free to go west.

    To Procopius the gold was a price paid for peace. The Encyclopaedia Iranica puts it the way Persians saw it: Rome agreed to pay its share for guarding the passes of the Caucasus, through which nomads from the steppes could raid either empire.

    The next year Belisarius sailed for Africa, and the Vandal War has its own tab.

    Procopius, Wars 1.22.1–19 · Bury, vol. 2, p. 88 · Encyclopaedia Iranica, “Byzantine-Iranian Relations”

  10. 540 to 545 Khosrow breaks the peace

    The second war

    539 to 545. Alarmed at Justinian’s conquests in the West, and urged on by the Goths and the Armenians, Khosrow strikes into Roman Syria.

  11. 539

    The Goths and the Armenians plead with Khosrow

    Envoys of the Gothic king Vitiges, losing in Italy, and of the Armenians, in revolt against Rome, urge Khosrow to attack while the Empire’s armies are in the West. A quarrel between the two empires’ Arab allies gives him his pretext.

    The Encyclopaedia Iranica says Khosrow “became alarmed” at Justinian’s conquests and was urged “to counter the universalist aims of the Byzantine emperor before it was too late.” The Gothic War’s tab has the Goths’ side of the embassy.

    Procopius, Wars 2.1.1–15 · Wars 2.2.1–12 · Wars 2.3.31–57 · Bury, vol. 2, p. 92 · p. 93 · Encyclopaedia Iranica, “Byzantine-Iranian Relations”

  12. Jun 540

    Khosrow sacks Antioch

    Khosrow marches up the Euphrates into Syria, takes ransoms from the towns in his path, and storms Antioch, one of the greatest cities of the Empire. He enslaves its people, strips its church of marble, and burns the city. Then he bathes alone in the sea at Seleucia.

    Procopius tells of two noblewomen of Antioch who, rather than be taken by the Persians, covered their faces and threw themselves into the river Orontes.

    The Romans agreed to pay Khosrow fifty centenaria at once and five more every year for him to go home, and he still took ransoms from Apamea and other towns on the way back.

    Procopius, Wars 2.5–9 · Wars 2.8.35 · Wars 2.10.24 · Wars 2.11.1 · Bury, vol. 2, p. 74 · p. 93 · Britannica, “Antioch”

  13. 540

    A new Antioch in Persia

    Near his capital, Ctesiphon, Khosrow builds a new city for the captives from Antioch and names it the Antioch of Khosrow. He gives it a bath and a hippodrome, with charioteers and musicians brought from the Roman cities.

  14. 541

    Persia takes Petra, on the Black Sea

    The Lazi of Lazica, a Christian people on the eastern shore of the Black Sea, tired of Roman rule, invite Khosrow in. He takes the Roman fortress of Petra, and Persia has a foothold on the Black Sea for the first time.

  15. 541–542

    Belisarius in the east

    Called back from Italy, Belisarius invades Persian Mesopotamia in 541. The next year he meets Khosrow’s envoy with six hundred of his tallest men, out hunting as if they had nothing to fear, and Khosrow turns back.

    In 541 he took the Persian fort of Sisauranon.

    Belisarius’s men crossed the Euphrates in plain sight of the envoy, and Khosrow, Procopius says, decided not to risk a battle. The Secret History tells the campaign of 541 very differently: Belisarius, it says, turned his army back after Sisauranon because he heard his wife Antonina was coming east, and would not go more than a day’s march from the frontier.

    Procopius, Wars 2.19.1–49 · Wars 2.20–21 · Secret History 2.18–25 · Bury, vol. 2, p. 100 · p. 104

  16. 542–543

    The plague reaches both empires

    The plague that came out of Egypt in 541 kills great numbers in Constantinople in 542, and the next year it strikes Persia. Khosrow and his army fall sick and he retreats into Assyria to escape it. The Gothic War’s tab tells the plague in full.

  17. 543

    Disaster at Anglon

    With Persia weakened by the plague, a Roman army of 30,000 invades Persarmenia with no single commander. At the village of Anglon, 4,000 Persians waiting in the hills rout it.

  18. 544

    The siege of Edessa

    Khosrow builds a great mound against the wall of Edessa. The defenders tunnel under it, pack it with tree trunks soaked in cedar oil and set it on fire. His last assault fails, and the city pays him 500 pounds of gold to leave.

    The Christians of Edessa believed Christ himself had promised the city would never be taken. Procopius tells that story too, and says Khosrow attacked Edessa in part to prove it false.

    Procopius, Wars 2.12.7–30 · Wars 2.26–27 · Wars 2.27.1–8 · Bury, vol. 2, p. 109 · p. 112

  19. 545

    A five-year truce

    Rome and Persia agree a truce for five years, and Rome pays 20 centenaria, 2,000 pounds of gold. Persia keeps Lazica, and Khosrow begins planning to move its people out and settle Persians there.

  20. 548 to 562 The war for Lazica

    The war for Lazica

    548 to 557. The Lazi turn back to Rome, and for nine years the two empires fight over a strip of the Black Sea coast.

  21. 548

    The Lazi turn back to Rome

    Persian rule proves harder than Roman. The Lazian king, Gubazes, learns that Khosrow is plotting to kill him and settle Persians in his land, and asks Justinian to take Lazica back.

  22. 549–550

    The Romans besiege Petra, and fail

    Justinian sends 7,000 men and 1,000 Tzani to Lazica under a young general, Dagisthaeus, who besieges Petra. Part of the wall comes down, but he does not march in, and the Persians fill the breach with sandbags until a relief army arrives.

  23. Spring 551

    An old general storms Petra

    The new commander in Lazica, Bessas, the same man who had commanded Rome in the siege of 546, storms Petra. Old and heavy, he falls from a ladder in the assault, is pulled clear by his men, gets up, and climbs again. The Persian garrison is overwhelmed.

    Dagisthaeus had been accused of letting himself be talked out of taking Petra two years earlier, and was replaced.

    Inside, the Romans found the armory Khosrow had stocked for a long siege, and saw how much Lazica mattered to him.

    Procopius, Wars 8.11.11–62 · Wars 8.12.17 · Bury, vol. 2, p. 116

  24. Autumn 551

    The truce is renewed, but not in Lazica

    After eighteen months of talks, Rome and Persia renew the truce for five years for 20 centenaria, with Lazica left out. Procopius complains that Khosrow had now collected 46 centenaria of “tribute” in eleven and a half years.

  25. 554–555 Disputed

    Roman generals murder the Lazian king

    Two Roman officers tell Justinian that King Gubazes of Lazica is secretly favoring Persia, and then kill him. The Lazi nearly go over to Persia. After a Roman trial held before the Lazi, the two killers are executed.

    They had got a letter from Justinian allowing them to use force if the king resisted.

    The story is told by Agathias, who carried Procopius’s history on from 552. Bury calls the message the officers sent “false.” The Lazi, he says, thought of turning to Persia, but their Christian faith and their memory of Persian rule kept them with Rome.

    Bury, vol. 2, p. 117 · p. 119

  26. 555

    Persia fails at Phasis

    In the spring of 555 the Persian general Nachoragan attacks Phasis, at the mouth of the river of that name on the Lazian coast, and is beaten in the battle before the town.

  27. 557

    A truce for every front

    Both empires, weary of the war, agree a truce that covers Lazica as well as the rest of the frontier.

  28. The Fifty Years’ Peace

    557 to 562. Five years of talks end in the longest peace the two empires had tried to make.

  29. 562 Disputed

    The Fifty Years’ Peace

    Justinian’s and Khosrow’s envoys sign a peace for fifty years. Persia gives up Lazica, Rome pays 30,000 gold pieces a year, trade is held to named border towns, and Persia’s Christians may worship freely.

    Peter, Justinian’s master of offices, met Khosrow’s envoy on the frontier, and Rome paid the first seven years’ gold at once.

    The document Khosrow sent to ratify it began, in the words the Roman envoy Menander recorded: “The divine, good, pacific, ancient Chosroes, king of kings ... to Justinian Caesar our brother.” It is the nearest thing to a Persian voice in this whole story.

    Romans called the yearly gold tribute. The Encyclopaedia Iranica calls it a payment for the defense of the Caucasus.

    Bury, vol. 2, p. 120 · p. 121 · p. 122 · Encyclopaedia Iranica, “Byzantine-Iranian Relations”

  30. 562 and after

    Where it ended

    • 572Justin II stops the yearly payments, and the war begins again.
    • 603–628The last great war between Rome and Persia. Persian armies take Syria, Jerusalem and Egypt, and camp within a mile of Constantinople.
    • 637–651Arab armies destroy the Sasanian empire.

    The peace lasted ten years. Justin II, Justinian’s nephew, stopped the payments in 572, and the two empires went back to war on and off for most of the next sixty years, until both were worn out and the Arab armies overran Persia.

    Encyclopaedia Iranica, “Byzantine-Iranian Relations” · Britannica, “Sasanian dynasty”

Every card links its sources: Procopius’s own words, down to the sentence, wherever he tells the event, then the history J. B. Bury wrote from all the sources in 1923, and modern reference works for the Persian side. Where the sources tell an event differently, its drawer gives each account and says whose it is. Every number is the source’s own, and where historians doubt it, the drawer says so.

Notes

How this was made, and what it leaves out

Who tells this story

Most of what is known about this war comes from Procopius, who joined Belisarius as his secretary in 527 and was with him at Dara. The Persian War is Books I and II of his History of the Wars, and the war for Lazica in the 550s is in his Book VIII. After 552 the story comes from Agathias, and the peace of 562 from the Roman envoy Menander, both through J. B. Bury’s history.

No Persian account of the war survives from the time. The Persian side is here as the Roman writers report it, with the reading of modern Iranian studies beside it where the two differ, above all over what Rome’s payments to Persia were for.

Who goes where

A card’s column says who acted, never who was right or who suffered. The sack of Antioch is on the right because Persia did it. The truces and peaces are in the middle, marked with a diamond, because both sides made them.

The middle is also for everyone else: the Lazi and the other peoples of the Caucasus, the Goths’ and Armenians’ envoys to Khosrow, and the rioters of the Nika revolt in Constantinople in 532, which is on this tab because Procopius told it in his first book on the Persian war.

Names, dates and numbers

Names are spelled the way most English histories spell them: Khosrow and Kavadh, which Procopius’s translator writes Chosroes and Cabades. Persia is what the Romans called the empire, and its own people called it Iran.

Dates are as exact as the sources allow. Ancient writers’ numbers for armies are often far too big, and the drawers give such figures as the writer’s own. Sums of gold are in centenaria, a hundred Roman pounds each.

The sources

Every link goes to a text anyone can read for free. Procopius is in H. B. Dewing’s translation, and each link goes to the sentence on Bill Thayer’s LacusCurtius site: “Wars 2.9.17” is book 2, chapter 9, section 17. J. B. Bury’s History of the Later Roman Empire, from 1923, is linked by the page. The Encyclopaedia Iranica opens in a browser, though it turns away some programs.

What it leaves out

This tab is the war with Persia. The wars in Africa and Italy have tabs of their own. The raids across the Danube, the Arab allies’ own wars in the desert, and many small battles in Armenia and the Caucasus come into these cards only where they changed the course of the war.

It is not a verdict on who was right, and it doesn’t try to be.

Tell me what I got wrong

If something here is missed, misrepresented or unfairly portrayed, let me know. Point me at a document or a report and I will verify it on my end. I actively look to correct, improve and remain unbiased.

Type of issue

No account, no name, no email. The submission stores what you typed, your address and your browser string, to make abuse traceable and for nothing else.

Sources and links checked October 21, 2026.

Terms

Plain English

Words these pages use because Procopius and the other writers of the time use them. Where a word is a later historian’s, the definition says so.

The two sides

Eastern Roman Empire
The half of the Roman Empire ruled from Constantinople, which outlasted the western half by nearly a thousand years. Its people called themselves Romans.
Byzantine
The name historians gave the Eastern Roman Empire long after it was gone, from Byzantium, the old Greek name of Constantinople. Nobody at the time called it that.
Ostrogoths
The eastern Goths, a Germanic people who came out of the Balkans under Theodoric and ruled Italy from 493 until this war. Their cousins the Visigoths, the western Goths, ruled Spain.
Arian
A kind of Christianity which held that the Son was created by the Father, and so was less than him. The Goths, the Vandals and the Lombards were Arians. The Empire and most Italians held the Catholic creed, which says the two are equal.
Catholic
Here, the creed of the councils of Nicaea and Chalcedon, held by the emperors and the popes, as against the Arians.

Peoples in the armies

Isaurians
Mountain people from southern Asia Minor, now Turkey, inside the Empire, who served in its armies.
Huns
Nomad horsemen from beyond the Black Sea. By Justinian’s day the name covered several such peoples, and many of them fought for the Empire as mounted archers.
Heruls
A Germanic people from the Danube, many of whom fought for the Empire for pay.
Gepids
A Germanic people on the middle Danube, neighbors and enemies of the Lombards.
Lombards
A Germanic people from the Danube. They sent soldiers to fight for Narses in 552, and in 568 came into Italy themselves and took most of it.
Franks
The Germanic people who ruled Gaul, now France, under kings of their own. Both sides in this war courted them, and they kept faith with neither.
Alamanni
A Germanic people of the upper Rhine, ruled by the Franks in Justinian’s day.
Burgundians
A Germanic people in the Rhône valley, conquered by the Franks in 534.

Offices and titles

Senate
Rome’s ancient council of the great landowning families. It still met in Rome under the Gothic kings, and its members were the richest men in Italy.
Consul
An old Roman office that was by now an honor. It gave its name to the year, and Belisarius held it in 535. Justinian let it lapse after 541.
Patrician
A title of the highest honor, given by the emperor.
Eunuch
A man castrated as a boy. Eunuchs served in the emperor’s palace, and a few, like Narses, rose to great power.
Pope
The bishop of Rome. In this war the popes were subjects first of the Gothic king and then of the emperor, and both sides tried to use them.
Pallium
A band of white wool worn over the shoulders, the sign of a pope’s or an archbishop’s office.
Pragmatic Sanction
A law an emperor issued in answer to a request. Justinian’s of 554 laid down how Italy was to be ruled after the war.

Money

Centenarium
A hundred Roman pounds of gold, about 72 of today’s pounds. Large sums were counted in them.
Gold piece
The solidus, the Empire’s gold coin. Seventy-two were struck from a Roman pound of gold.

The sources

Procopius
Procopius of Caesarea, Belisarius’s legal secretary from 527, who saw much of these wars himself and wrote their history in eight books, the Wars. He also wrote the Secret History and a book on Justinian’s buildings.
Secret History
A book Procopius wrote in secret, about 550, and could not publish. It blames Justinian, Theodora, Belisarius and his wife Antonina for the age’s disasters, and historians use it with care.
Book of the Popes
The Liber Pontificalis, lives of the popes kept by the church in Rome. Some lives were written soon after the events they tell.
Cassiodorus
A Roman senator who served the Gothic kings as a minister and wrote their official letters, which he collected as the Variae.
Jordanes
A writer of Gothic descent who wrote a history of the Goths in Constantinople, about 551.
Agathias
A lawyer and poet in Constantinople who carried Procopius’s history on from 552 to 559.
Moors
The Roman name for the Berber peoples of North Africa, outside and inside the old provinces, under kings of their own. Procopius uses it, and it is not the later Spanish sense of the word.

The east

Sasanian Empire
The Persian empire of the Sasanian kings, from 224 to 651, covering modern Iran and Iraq and more, with its capital at Ctesiphon, near modern Baghdad.
Zoroastrian
The old faith of Iran, taught by the prophet Zoroaster, and the religion of the Sasanian kings. It held that the dead should not defile the earth, so the dead were left to the birds.
Lazica
A small Christian kingdom on the eastern shore of the Black Sea, in what is now western Georgia, long under Roman protection.
Arab allies
Arab kings of the desert frontier who fought for the two empires: the Lakhmids, from al-Hira on the Euphrates, for Persia, and the Ghassanids, in the Syrian desert, for Rome.
Blues and Greens
The two great fan clubs of the chariot races in Constantinople, with their own seats, colors and street gangs, and a hand in politics.