In the long and often tragic history of the Crusades, few episodes encapsulate the complex interplay of piety, ambition, folly, and honour quite like the disastrous charge into the city of Mansurah on 8 February 1250. It was a calamitous military blunder that crippled the Seventh Crusade, led to the capture of a saintly French king, and saw a generation of Frankish chivalry annihilated in the narrow, dusty streets of an Egyptian delta town. Yet, from the blood and chaos of this defeat, a powerful narrative of heroic sacrifice was forged. The story of Mansurah became less a cautionary tale of tactical ineptitude and more a glorious testament to Christian martyrdom, carefully curated by chroniclers to salvage honour from the wreckage and burnish the reputations of the families who lost their sons. For the knightly families of England, particularly those in counties like Lincolnshire, the death of their contingent’s leader, William II Longespée, transformed a distant catastrophe into a potent local legend of faith and valour.
A King's Vow: The Genesis of the Seventh Crusade
The Seventh Crusade was born not of a papal call to reclaim a lost city, but from the intensely personal piety of one man: King Louis IX of France. In late 1244, the king fell gravely ill, so much so that his attendants believed him to be dead. Upon his miraculous recovery, a deeply moved Louis immediately “took the cross,” vowing to lead a crusade to the Holy Land. For Louis, this was no mere political gesture; it was the sacred fulfilment of his duty as Christendom’s Most Christian King.
His chosen target was not Jerusalem itself, but the seat of Ayyubid power in Egypt. This strategy, first attempted during the ill-fated Fifth Crusade (1217-1221), was sound in principle: capture the economic heart of the enemy’s empire, and the Holy Land could be bargained for or conquered with ease. The preparations were meticulous and hugely expensive, taking over three years. Finally, in August 1248, Louis’s magnificent army set sail from Aigues-Mortes.
Initial success seemed to vindicate the king’s divine mission. In June 1249, the crusader fleet arrived off the coast of Egypt. The chaotic and ill-disciplined Ayyubid defence of the port city of Damietta crumbled almost immediately. The garrison fled under cover of night, allowing the crusaders to walk into one of the most heavily fortified cities in the Islamic world without a fight. The mood in the crusader camp was euphoric. God, it seemed, was clearly on their side. This early victory, however, bred a dangerous overconfidence that would have devastating consequences.
The Slow March to Mansurah
Following the capture of Damietta, the crusaders were forced to wait for the annual Nile flood to subside. It was not until 20 November 1249 that the army finally began its advance south towards the Sultan’s main military encampment at Mansurah (“The Victorious”), a fortress city some fifty miles upriver. The march was arduous. The Frankish host, encumbered by its supply train and siege equipment, crawled through the delta’s difficult terrain, constantly harassed by Saracen light cavalry. Sickness, likely dysentery and scurvy, began to thin their ranks.
Their objective, Mansurah, was protected by a formidable natural barrier: the Ashmum canal (today known as the Bahr as-Saghir), a wide branch of the Nile. The Ayyubid army, under the command of the capable emir Fakhr al-Din ibn Shaykh al-Shuyukh, was encamped on the opposite bank. For weeks, the two armies faced each other in a stalemate. The crusaders’ attempts to build a causeway across the canal were repeatedly thwarted by Ayyubid ingenuity, particularly their devastating use of Greek Fire, which incinerated the Franks’ wooden siege towers. The eyewitness Jean de Joinville, Seneschal of Champagne, later wrote of the terror it inspired: “It came flying through the air like a winged dragon… making such a noise that it seemed like a thunderbolt from heaven.” The crusade had stalled, and morale was beginning to fray.
The Fateful Crossing: Hubris at the Ashmum Canal
The breakthrough came in early February 1250. A local Bedouin, for a handsome reward of 500 bezants, revealed the location of a ford further down the canal, shallow enough for cavalry to cross. A plan was quickly formulated. On the morning of Tuesday 8 February, a vanguard force, composed of the elite of the army, would cross the ford under the cover of darkness. They were to secure a bridgehead and hold their position until the main body of the army, led by King Louis himself, could be ferried across.
Command of this vanguard was given to the king’s impetuous younger brother, Robert, Count of Artois. With him were the two great military orders, the Knights Templar and Knights Hospitaller, and the English contingent. The orders given to Robert of Artois by his royal brother were explicit and repeated: cross, establish a defensive position, and wait.
It was here that personal ambition and the competitive pressures of the chivalric ethos fatally undermined military discipline. Joinville, who was present at the council, provides a chilling account of the events. After successfully crossing the ford, the vanguard surprised and overran the Egyptian camp. The Ayyubid commander, Fakhr al-Din, was caught completely unawares—killed in his tent as he was hastily arming himself. The Egyptian vanguard disintegrated and fled in panic towards the city of Mansurah.
For Robert of Artois, this easy victory was intoxicating. Ignoring the frantic pleas of the seasoned Grand Master of the Temple, Guillaume de Sonnac, who counselled him to regroup and wait for the king as ordered, Robert declared his intention to pursue the fleeing enemy into the city itself. The Grand Master warned that the enemy was merely feigning retreat and would trap them in Mansurah’s narrow streets. To this, Robert reportedly responded with a contemptuous insult, accusing the Templars of cowardice and treachery, a common but baseless slander against the order. Inflamed by the slight and driven by a reckless desire for personal glory, the Count of Artois ordered the charge.
An Honourable Folly: The English at Mansurah
Caught in this unfolding drama was the small but significant English contingent, led by William II Longespée. Longespée was the epitome of the high medieval aristocrat. His lineage was impeccable: his father was William Longespée, 3rd Earl of Salisbury, the illegitimate but acknowledged son of King Henry II. This made William the younger a great-grandson of a Plantagenet king. The Longespée family held vast estates, and while their primary seat was at Salisbury, their holdings, as part of the extensive Honour of Salisbury, included manors scattered across England. Critically, these included the valuable manor of Sutton in Holland, in the south of Lincolnshire. News of the fortunes of its lord would have been a matter of intense interest and importance to his tenants and the neighbouring gentry of the county.
William had taken the cross in 1247, a pious act but also one that followed a period of political friction with his cousin, King Henry III. Leading his own retinue to the Holy Land was a way to reaffirm his status and pursue the chivalric ideals of his class.
The English chronicler Matthew Paris, in his Chronica Majora, provides a detailed—and highly sympathetic—account of Longespée’s role in the debate before Mansurah. According to Paris, Longespée joined the Grand Master of the Temple in vehemently protesting Robert’s plan. He is said to have delivered a wise and sober speech, urging the count to heed the counsel of experienced men and await the king. Robert of Artois, however, was deaf to reason. He sneered at Longespée, taunting him with the stereotypical English fearfulness: "The army of the Franks would be purged of tails and the tailed, if we were to follow this tailed Englishman." The insult, referring to a bizarre continental belief that Englishmen had tails, was designed to sting.
Faced with a public accusation of cowardice, Longespée had no choice. The code of chivalry demanded that honour be defended, even at the cost of one's life. To refuse the charge now would be to invite perpetual disgrace. According to Paris, he replied with dignity: "Count Robert, I will most certainly go with you, and I and mine will face the dangers of death to such an extent that you will not dare to be even at my horse's tail." With that, he turned, raised his banner—blue with six silver lions rampant—and spurred his horse towards the gates of Mansurah. He was riding to his death, but he was doing so to preserve his honour.
Slaughter in the Labyrinth
The crusader vanguard, a force of perhaps 1,400 cavalry including some 280 Templars, poured into the seemingly undefended city. Their initial charge carried them deep into the labyrinthine streets. It was a trap.
The Egyptian forces, particularly the elite Mamluk Bahriyya regiment led by the brilliant and ruthless officer who would later be known as Sultan Baibars, had regrouped. They blocked the narrow streets with barricades, while citizens and soldiers rained down stones, boiling water, and missiles from the rooftops. The crusader charge lost its momentum, and the heavily armoured knights, so formidable in an open field, were helpless. Trapped, separated, and unable to manoeuvre, they were cut down one by one.
Joinville, who narrowly survived the battle, described the horror: "The Turks… drove us back into a street, and there they hemmed us in… There the slaughter began, and the Turks threw so many missiles from the side streets at our men that it resembled a shower of rain."
Robert of Artois, the architect of the disaster, was cornered in a house and killed. The Templars, fighting with desperate courage around their Grand Master (who lost an eye in the fighting but initially escaped), were almost entirely wiped out. Only a handful of the 280 knights survived. William Longespée and his English knights fought to the last. Matthew Paris’s account of his end is pure hagiography, a perfect image of a Christian warrior-martyr. He claims Longespée killed numerous enemies before being overwhelmed: "after his horse was slain and his own leg broken, he continued to fight on his knees until, covered in wounds, he breathed his last, martyred for Christ." The English contingent was annihilated with him.
The Aftermath: Defeat and Captivity
While the vanguard was being slaughtered, King Louis’s main army was still struggling to cross the canal. When news of the disaster reached him, he spurred his horse across the ford and, with the forces he had, fought a desperate day-long battle to hold the bridgehead against a resurgent and emboldened Egyptian army. Though the Franks held their ground, the cost was enormous. The king himself, according to Joinville, fought with incredible personal bravery, but he could not reverse the strategic catastrophe. His elite vanguard was gone.
The crusader army was now trapped on the wrong side of the canal. For the next eight weeks, they endured a brutal siege in their own camp. Disease ran rampant, supplies were exhausted, and the new Ayyubid Sultan, Turanshah, arrived to press the attack. Finally, in early April 1250, Louis ordered a retreat to Damietta. The retreat turned into a rout. The sick and exhausted army collapsed, and on 6 April, King Louis IX—feverish, suffering from severe dysentery, and unable to even stand—was captured along with the pathetic remnants of his once-great army. The Seventh Crusade had ended in the most humiliating failure imaginable. Louis would eventually be ransomed for the immense sum of 400,000 livres tournois and the surrender of Damietta.
Forging a Legacy: The Pen is Mightier than the Sword
In the wake of such a cataclysmic defeat, the task of explaining what happened fell to the chroniclers. It was in their accounts that the military disaster was reinterpreted as a story of honour and sacrifice, a process that served to protect the powerful and console the bereaved.
For French chroniclers like Jean de Joinville, the narrative was clear and simple: the blame lay squarely with the hot-headed and disobedient Robert of Artois. By focusing on Robert’s folly, Joinville absolved King Louis of any strategic error. The king remained a pious, brave, and noble leader let down by an impetuous subordinate. The knights who died with Robert were portrayed as victims of his arrogance, their deaths tragic but ultimately a consequence of flawed command. This narrative conveniently protected the prestige of the French monarchy.
For the English, however, the story of Mansurah was shaped almost single-handedly by the St Albans chronicler, Matthew Paris. Writing from the safety of his scriptorium in Hertfordshire, Paris transformed William Longespée from a casualty of a foolish charge into the central hero of the battle—a Christian martyr of near-saintly proportions. His account in the Chronica Majora is a masterpiece of historical mythmaking.
Paris constructs a perfect chivalric hero. His Longespée is wise, bravely speaking truth to power by opposing Robert’s rashness. He is honourable, choosing to fight rather than suffer a false accusation of cowardice. And he is a peerless warrior, dying a hero’s death against overwhelming odds. The story did not end with his death on the battlefield. Paris relates a powerful, poignant story that would have resonated deeply with a medieval audience. He records that on the very day of the battle, William’s mother, the devout Ela, Countess of Salisbury, was at her prayers in Lacock Abbey when she had a vision. In it, she saw a knight in full armour, bearing the Longespée shield, ascending into a sky opened to receive him. It was, for Paris and his readers, divine confirmation that William had died a martyr’s death and been received directly into heaven.
This narrative served multiple purposes. It provided an inspiring tale of English valour that stood in stark contrast to the perceived arrogance of the French. It offered profound spiritual consolation to the Longespée family, recasting their tragic loss as a heavenly triumph. Furthermore, it elevated the prestige of the entire English knightly class, demonstrating that they were second to none in piety and courage.
Conclusion: Memory, Honour, and the Lincolnshire Connection
The Battle of Mansurah was an unmitigated military failure. A rash decision, born of chivalric pride and youthful arrogance, led to the destruction of the crusader vanguard and doomed the entire enterprise. Yet, the memory of the event was not one of shame, but of glory. The disaster was reframed as a crucible of honour, sacrifice, and martyrdom.
The differing accounts of Joinville and Matthew Paris reveal how history is written by the survivors to serve the needs of the living. In France, the blame was apportioned to a dead prince to protect a living king. In England, a national hero was created from the body of a fallen knight. The tale of William Longespée, the lord of Sutton in Lincolnshire, would have been told and retold in the halls and manors of the county. His stand at Mansurah became more than just a battle report; it became an exemplum—a moral tale of the ideal knight who balanced wisdom with courage and ultimately chose an honourable death over a disgraced life. The dust-choked streets of Mansurah, a place of catastrophe and defeat, were transformed by the power of narrative into a sacred landscape of English martyrdom, securing for William Longespée and his family a legacy of immortal honour.
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Sources & Further Reading
Primary Sources
De Joinville, Jean. The Life of Saint Louis. Translated by M. R. B. Shaw in Chronicles of the Crusades. Penguin Classics, 1963. [The essential eyewitness account from the French perspective]. Paris, Matthew. Chronica Majora. Edited and translated by H. R. Luard (Rolls Series, 7 vols., 1872–83). A modern translation of the relevant period can be found in The Illustrated Chronicles of Matthew Paris, edited by Richard Vaughan. The History Press, 2002. [The primary source for the English, hagiographic account of William Longespée]. Al-Maqrizi, Taqi al-Din. Kitāb al-Suluk li-Ma’rifat Duwal al-Muluk (The Book of the Path to Knowledge of the Dynasties of the Kings). Partial translation available in A History of the Ayyubid Sultans of Egypt, translated by R. J. C. Broadhurst. Twayne Publishers, 1980. [Provides a key Egyptian perspective on the campaign]. Letters from the crusaders, such as those of the Patriarch of Jerusalem, Robert, and the Master of the Temple, Jean de Ronay, can be found in collections like the Epistolae Cantuarienses (Rolls Series) and cited in secondary works.
Secondary Sources
Barber, Malcolm. The New Knighthood: A History of the Order of the Temple. Cambridge University Press, 1994. [Excellent on the Templars' role and the accusations against them]. Carpenter, David A. The Reign of Henry III. Hambledon Press, 1996. [Provides context for William Longespée’s political situation in England before the crusade]. Jordan, William Chester. Louis IX and the Challenge of the Crusade: A Study in Rulership. Princeton University Press, 1979. [The definitive modern study of the Seventh Crusade and Louis IX’s motives]. Lower, Michael. The Barons' Crusade: A Call to Arms and Its Consequences. University of Pennsylvania Press, 2005. [Details the crusading environment in the decades prior to Louis's expedition]. Painter, Sidney. "The Crusade of Theobald of Champagne and Richard of Cornwall, 1239–1241." In A History of the Crusades, Volume II: The Later Crusades, 1189-1311, edited by R. L. Wolff and H. W. Hazard. University of Wisconsin Press, 1969. [Useful background]. Riley-Smith, Jonathan. The Crusades: A History. 3rd Edition. Bloomsbury, 2014. [A superb general overview of the crusading movement]. Tyerman, Christopher. England and the Crusades, 1095-1588. University of Chicago Press, 1988. [The standard work on English participation in the crusades, with specific analysis of Longespée]. Tyerman, Christopher. God's War: A New History of the Crusades. Belknap Press, 2006. [A monumental and highly detailed modern history of the crusades]. Victoria County History: A History of the County of Lincoln: Volume 2*. Edited by William Page. 1906. [Documents landholding patterns, including the Honour of Salisbury's lands in Lincolnshire, such as Sutton].