Forget Manzikert. The Defeat That Really Broke Byzantium Came 105 Years Later

How I make this: written in Greek and translated into English by me, with AI assistance (Claude, by Anthropic) for editing, fact-checking, and maps.

Two defeats

In the late twelfth century, everyone at the Byzantine imperial court knew the same story. In August 1071, the Byzantine emperor of a century before, Romanos IV Diogenes, had marched east with his army to confront a new enemy on the Armenian frontier: the Seljuk Turks under the leadership of Sultan Alp Arslan. Near Lake Van, at a place called Manzikert, the Byzantine army was vanquished and the Emperor was captured. Yet his captivity did not last long: the Sultan soon released him on relatively lenient terms.

The defeat at Manzikert is the one most people remember. Popular accounts treat the defeat of 1071 as the moment the Empire began its long decline toward 1453. Steven Runciman went a step further, calling it “the most decisive disaster in Byzantine history.”

But the real disaster came over a century later, in 1176, when Emperor Manuel I Komnenos marched east with an army of exceptional size and lost the battle against the Turks at Myriokephalon. What follows is why the second defeat weighed more heavily.

The recovery that made recovery possible

To understand why the Byzantine defeat at Myriokephalon was worse than the one at Manzikert, we have to look at what happened between the two battles.

The actual loss of Anatolia was not an outcome of the defeat at Manzikert. It unfolded in the decade after the battle, when Byzantine elites refused to honor the treaty Romanos had signed with the Sultan, deposed and blinded their emperor, and spent the following years in civil war. The Turks, until then only intermittent raiders, expanded into the vacuum. By the early 1080s, the Sultanate of Rum was established in western Anatolia, with its capital at Nicaea. The capital would move inland to Iconium only after Nicaea surrendered to the Byzantines during the crusader siege of 1097.

But instead of collapsing, the Byzantine Empire was stabilized under the leadership of a young general named Alexios Komnenos, who seized the throne in 1081. Alexios rebuilt the army, helped set the First Crusade in motion, and used it to retake the coasts and river valleys of western Anatolia from the Turks. His son John II Komnenos later pushed further east. As a result, his grandson Manuel I Komnenos inherited an empire that was richer, stronger, and more confident than the one that had fallen apart after Manzikert.

The crucial fact is that Manzikert was followed by a hundred-year recovery. The collapse of the 1070s had been catastrophic, but the Byzantine response had been brilliant. By the 1170s, the Empire that had nearly fallen apart a century earlier had been revived as the most significant power in the Christian East.

The project

Manuel I ascended to the throne in 1143 with all of this behind him, and for the next thirty years he extended Byzantine power outward, fighting campaigns in Italy, in the Balkans, in Hungary, and in Syria. He married two Western princesses in succession and courted crusader kings, and by the 1170s he had established Constantinople once again as the gravitational center of the eastern Mediterranean.

But the Anatolian plateau (eastern Phrygia, Lycaonia, Cappadocia), whose provinces had supplied the Empire with grain, soldiers, and taxes for over a thousand years, was no longer Byzantine and remained in Seljuk hands. This was the unfulfilled objective of Manuel’s dynasty.

By the mid-1170s, the strategic situation demanded a final reckoning. The long peace had offered Kilij Arslan II the opportunity to eliminate his rivals: after 1174, he destroyed the Danishmendid emirates and expelled his brother Shahinshah from his lands near Ankara, but then refused to hand over the conquered territory, as his treaty with Manuel required. In 1175, Manuel chose to challenge Seljuk power directly by refortifying the two frontier fortresses of Dorylaion and Soublaion.

In the summer of 1176, Manuel launched his campaign against Iconium, intending to capture the Seljuk capital and break Seljuk power in Anatolia for good. Alongside his own troops marched contingents from his allies and vassals: Hungarians sent by King Béla III, and forces from Antioch and Serbia. Modern estimates place the whole force at twenty-five to thirty-five thousand men, supported by siege equipment, supply trains, and the full administrative weight of the Komnenian recovery. In a letter he later wrote to Henry II of England, Manuel himself said that his baggage and siege train stretched for ten miles of road. This was meant to be the decisive campaign of his reign. Manuel was now in his late fifties, and this was the campaign he wanted to be remembered for.

The pass

Kilij Arslan had repeatedly offered to negotiate as the Byzantine column approached, but he also knew his enemy: Manuel’s army was enormous but slow. The road to Iconium crossed the highlands of Phrygia, through a network of narrow valleys and forested passes. Near the ruined fort of Myriokephalon, whose name means Myriad Heads, probably after the many peaks that surrounded it, the road ran through a defile, the pass of Tzivritze.

The Sultan stationed his army on the slopes above the pass and waited.

On September 17, 1176, the Byzantine column entered the pass. The vanguard and the main division got through before the rear had cleared the entrance. The supply train and siege equipment were strung out for miles between forested ridges from which the Turkish cavalry could not be dislodged. The Turks attacked the middle of the column, where the supply train was. The right wing was destroyed and its commander, Baldwin of Antioch, killed. Beyond the pass, the vanguard began to fortify a camp. The divisions still inside the pass were cut apart one by one; perhaps a quarter of the army fell.

Manuel himself survived and managed to rally his own division, fight his way past the wrecked baggage train, and join the vanguard in its camp. Soon afterward, the Sultan offered a truce, on condition that Manuel demolish the fortresses of Dorylaion and Soublaion. Niketas Choniates, our main source for the campaign, records that Manuel compared himself, in a message sent ahead to Constantinople, to Romanos IV Diogenes, a comparison no Byzantine emperor would have wanted. Yet in the same message, he boasted of the truce he had agreed with the Sultan, as if it were a victory, despite the loss of the right wing and the entire siege train. What weighed more heavily was that he had lost the strategic initiative he had spent thirty years building.

He returned to Constantinople. The Turks, for their part, did not gain much from their victory. The Empire’s armies were largely intact, and the following year they destroyed an invading Seljuk force in the Maeander valley, while the Empire retained its position in the Balkans. In 1179 the Emperor made peace with the Sultan. But he never again assembled an expedition on that scale, and never again marched on Iconium.

What did not come next

This is the point where Myriokephalon parts ways with Manzikert.

Manzikert had been followed by a long and brilliant recovery. The Komnenian century rebuilt much of what the eleventh-century collapse had destroyed. By the time Manuel came to the throne, the Empire had emerged, even without the Anatolian plateau, stronger than it had been before the defeat.

By contrast, Myriokephalon was followed by nothing of the kind.

Manuel died four years after the battle, in 1180. With his death, the web of alliances and client rulers he had spent decades building began to unravel. His eleven-year-old son Alexios II inherited the throne and was overthrown within three years by Andronikos I Komnenos, who terrorized the Byzantine elite and was himself overthrown and killed by a Constantinopolitan mob in 1185. The Angeloi, who seized power next, presided over a period of slow disintegration of imperial authority, with provinces breaking away, fiscal collapse, and military weakness. The process ended in 1204, with the Fourth Crusade sacking Constantinople and the Empire shattering into fragments.

There was no counterpart to Alexios I after Myriokephalon, at least not before 1204. No competent emperor seized the throne and stabilized the wreckage, and no new dynasty rebuilt the army. The Anatolian plateau passed permanently into foreign hands. The Sultanate of Rum consolidated its position over the next two generations, and territory that had been Byzantine for centuries was slowly and irreversibly converted into something else.

It is worth being precise about what this means. Manzikert opened the door to the loss of Anatolia, but the Empire recovered. Myriokephalon lost the recovery, and what could be recovered after it was much less than what could be recovered after Manzikert.

Why history remembers the wrong defeat

Manzikert is notorious because it fits a clean narrative. A Byzantine emperor was captured by a Seljuk sultan, and the date can be described as the moment “everything changed.” Subsequent events, such as the loss of Anatolia, the calling of the First Crusade, the eventual fall of Constantinople, can all be traced back to that single afternoon in 1071.

Myriokephalon does not fit this pattern. It was a battle the Emperor survived, and the Empire he ruled remained intact at the time of his death. The slow collapse that followed cannot be assigned to a single moment, because it happened over a generation.

But this is the historiographical bias at work. We remember defeats that can be narrated while we forget defeats whose damage emerges only in what does not happen afterward.

The lesson of Manzikert is that an empire can lose a battle and recover.

The lesson of Myriokephalon is that an empire can lose a battle and never recover. And that outcome is worse, because it does not feel devastating at the time. The Byzantine Empire in 1176 was richer and better organized militarily than it had been in 1071. The blow it received was, in absolute terms, smaller. But it landed on a system that had no further reserve of recovery. The Komnenian century had been the reserve. After Myriokephalon, there was nothing in the cellar.

It is tempting to read Manuel’s comparison of himself with Romanos Diogenes as an admission that he understood what had happened: the Empire had been holding itself together by his personal momentum, and he had spent that momentum on a pass in Phrygia. He died four years later. The Komnenian empire he left behind died with him, slowly, over twenty-four years. The Fourth Crusade in 1204 finished what Myriokephalon began.

The defeat at Myriokephalon ended the Byzantine attempt to reconquer Anatolia. The defeat at Manzikert had only opened the question.

I publish a new essay on Byzantine history every two weeks in my free newsletter, Byzantium Retold.

Sources and Further Reading

Primary sources

Attaleiates, Michael. The History. Translated by Anthony Kaldellis and Dimitris Krallis. Cambridge, MA: Harvard University Press, 2012.

Choniates, Niketas. O City of Byzantium: Annals of Niketas Choniates. Translated by Harry J. Magoulias. Detroit: Wayne State University Press, 1984.

Gesta Regis Henrici Secundi Benedicti Abbatis. Edited by William Stubbs. 2 vols. London: Longmans, Green, Reader and Dyer, 1867. Now attributed to Roger of Howden; preserves Manuel I’s letter of 1176 to Henry II of England.

Modern studies

Angold, Michael. The Byzantine Empire 1025–1204: A Political History. London: Longman, 1984.

Birkenmeier, John W. The Development of the Komnenian Army: 1081–1180. Leiden: Brill, 2002.

Cheynet, Jean-Claude. “Mantzikert: un désastre militaire?” Byzantion 50 (1980): 410–438.

Frankopan, Peter. The First Crusade: The Call from the East. London: Bodley Head, 2012.

Haldon, John. The Byzantine Wars: Battles and Campaigns of the Byzantine Era. Stroud: Tempus, 2001.

Hillenbrand, Carole. Turkish Myth and Muslim Symbol: The Battle of Manzikert. Edinburgh: Edinburgh University Press, 2007.

Kaldellis, Anthony. Romanland: Ethnicity and Empire in Byzantium. Cambridge, MA: Belknap Press of Harvard University Press, 2019.

Kaldellis, Anthony. Streams of Gold, Rivers of Blood: The Rise and Fall of Byzantium, 955 A.D. to the First Crusade. New York: Oxford University Press, 2017.

Magdalino, Paul. The Empire of Manuel I Komnenos, 1143–1180. Cambridge: Cambridge University Press, 1993.

Runciman, Steven. A History of the Crusades. Vol. 1, The First Crusade and the Foundation of the Kingdom of Jerusalem. Cambridge: Cambridge University Press, 1951.

Image credits

Header image: Lake Eğirdir at the Kemer narrows, with Çirişli Dağı across the water. A recent proposal by the researcher Ramazan Topraklı places the battle in a pass on the lake's eastern shore, beside this mountain; the exact site is still debated. Photo: Volker Höhfeld (1984), CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0), via Wikimedia Commons; cropped.