Battle of Tours

The invasion of Hispania, and then Gaul, was led by the Umayyad dynasty (Arabic: بنو أمية banū umayya / الأمويون al-umawiyyūn also "Umawi"), the first dynasty of Sunni caliphs of the Sunni Islamic empire after the reign of the Rashidun Caliphs (Abu Bakr, Umar, Uthman, and Ali) ended. The Umayyad Caliphate, at the time of the Battle of Tours, was perhaps the world's foremost military power. The great expansion of the Caliphate occurred under the reign of the Umayyads. Muslim armies pushed east across Persia and west across North Africa through the late 7th century.[23]

The Umayyad empire was now a vast domain that ruled a diverse array of peoples. It had defeated and completely absorbed the Sasanian Empire, while also conquering much of the Byzantine Empire, including Syria, Armenia, and North Africa, although Leo the Isaurian stemmed the tide when his army defeated the Umayyads at the Battle of Akroinon (740), their final campaign in Anatolia.[23]

The Frankish realm under Charles Martel was the foremost military power of western Europe. During most of his tenure in office as commander-in-chief of the Franks, it consisted of north and eastern France (Austrasia, Neustria and Burgundy), most of western Germany, and the Low Countries (Luxembourg, Belgium and the Netherlands). The Frankish realm had begun to progress towards becoming the first real imperial power in western Europe since the fall of Rome. However, it continued to struggle against external forces such as the Saxons, Frisians, and other opponents such as the Basque-Aquitanians led by Odo the Great (Old French: Eudes), Duke over Aquitaine, and Vasconia.

The "Age of the Caliphs", showing Umayyad dominance stretching from the Middle East to the Iberian Peninsula, including the port of Narbonne, c. 720

Tours

Autun

Narbonne

Toulouse

Modern-day French borders. Septimania runs along the Mediterranean (southeast) coast from the Spanish border, and Aquitaine is along the Atlantic (west) coast running north from Spain.

The Umayyad troops, under Al-Samh ibn Malik al-Khawlani, the governor-general of al-Andalus, overran Septimania by 719, following their sweep up the Iberian Peninsula. Al-Samh set up his capital from 720 at Narbonne, which the Moors called Arbūna. With the port of Narbonne secure, the Umayyads swiftly subdued the largely unresisting cities of Alet, Béziers, Agde, Lodève, Maguelonne, and Nîmes, still controlled by their Visigothic counts.[24]

The Umayyad campaign into Aquitaine suffered a temporary setback at the Battle of Toulouse. Duke Odo the Great broke the siege of Toulouse, taking Al-Samh ibn Malik's forces by surprise. Al-Samh ibn Malik was mortally wounded. This defeat did not stop incursions into old Roman Gaul, as Moorish forces, soundly based in Narbonne and easily resupplied by sea, struck eastwards in the 720s, penetrating as far as Autun in Burgundy in 725.[24]

Threatened by both the Umayyads in the south and by the Franks in the north, in 730 Odo allied himself with the Berber commander Uthman ibn Naissa, called "Munuza" by the Franks, the deputy governor of what would later become Catalonia. To seal the alliance, Uthman was given Odo's daughter Lampagie in marriage, and Moorish raids across the Pyrenees, Odo's southern border, ceased.[24] However, the next year, the Berber leader killed the bishop of Urgell Nambaudus and detached himself from his Arab masters in Cordova. Abdul Raḥman in turn sent an expedition to crush his revolt, and next directed his attention against Uthman's ally Odo.[25]

Odo collected his army at Bordeaux, but was defeated, and Bordeaux plundered. During the following Battle of the River Garonne, the Chronicle of 754[26] commented that "God alone knows the number of the slain".[27] The Chronicle of 754 continues, saying they "pierced through the mountains, trampled over rough and level ground, plundered far into the country of the Franks, and smote all with the sword, insomuch that when Eudo came to battle with them at the River Garonne, he fled."

Odo, who despite the heavy losses was reorganizing his troops, gave the Frankish leader notice of the impending danger knocking on the heartland of his realm and appealed to the Franks for assistance, which Charles Martel only granted after Odo agreed to submit to Frankish authority.

It appears that the Umayyads were not aware of the true strength of the Franks. The Umayyad forces were not particularly concerned about any of the Germanic tribes, including the Franks, and the Arab chronicles of that age show that awareness of the Franks as a growing military power only came after the Battle of Tours.

Further, the Umayyads appear not to have scouted northward for potential foes, for if they had, they surely would have noted Charles Martel as a force to be reckoned with in his own account, because of his growing domination of much of Europe since 717.

In 732, the Umayyad advance force was proceeding north towards the Loire River, having outpaced their supply train and a large part of their army. Having easily destroyed all resistance in that part of Gaul, the invading army had split off into several raiding parties, while the main body advanced more slowly.

The Umayyads delayed their campaign late in the year probably because the army needed to live off the land as they advanced. They had to wait until the area's wheat harvest was ready and then until a reasonable amount of the harvest had been stored.

Odo was defeated so easily at Bordeaux and Garonne, despite winning 11 years earlier at the Battle of Toulouse, because at Toulouse he had managed a surprise attack against an overconfident and unprepared foe: the Umayyad forces were mostly infantry, and what cavalry they did have were never mobilized. As Herman of Carinthia wrote in one of his translations of a history of al-Andalus, Odo managed a highly successful encircling envelopment which took the attackers totally by surprise, resulting in a chaotic slaughter of the Muslim forces.

At Bordeaux and again at Garonne, the Umayyad forces were mostly cavalry and had the chance to mobilize, which led to the devastation of Odo's army. Odo's forces, like other European troops of that era, had no stirrups at that time and therefore no heavy cavalry. Most of their troops were infantry. The Umayyad heavy cavalry broke Odo's infantry in their first charge and then slaughtered them as they ran.

The invading force went on to devastate southern Gaul. A possible motive, according to the second continuator of the Chronicle of Fredegar, were the riches of the Abbey of Saint Martin of Tours, the most prestigious and holiest shrine in western Europe at the time.[28] Upon hearing this, Austrasia's Mayor of the Palace, Charles Martel, prepared his army and marched south, avoiding the old Roman roads, hoping to take the Muslims by surprise.

By all accounts, the invading forces were caught off guard to discover a large force sitting directly in their path to Tours. Charles achieved the total surprise he had hoped for. He then chose not to attack and rather began fighting in a defensive, phalanx-like formation.[18] According to Arab sources, the Franks drew up in a large square, with hills and trees in their front to diminish or break up Muslim cavalry charges.

For seven days, the two armies engaged in minor skirmishes. The Umayyads waited for their full strength to arrive. 'Abd-al-Raḥmân, despite being a proven commander, had been outmanoeuvered; he had allowed Charles to concentrate his forces and pick the field of battle. Furthermore, it was impossible for the Umayyads to judge the size of Charles' army since he had used the trees and forest to screen his true numbers.

Charles' infantry was his best hope for victory. Seasoned and battle-hardened, most of them had fought with him for years, some as far back as 717. In addition to his army, he also had levies of militia which had not seen significant military use except for gathering food and harassing the Muslim army.

While many historians through the centuries have believed that the Franks were outnumbered at the onset of battle by at least two to one, some sources, such as the Mozarabic Chronicle of 754, disagree with that assertion.[29]

Charles correctly assumed that 'Abd-al-Raḥmân would feel compelled to give battle, and move on and try to loot Tours. Neither side wanted to attack. Abd-al-Raḥmân felt he had to sack Tours, which meant he had to go through the Frankish army on the hill in front of him. Charles' decision to stay in the hills proved crucial, as it forced the Umayyad cavalry to charge uphill and through trees, diminishing their effectiveness.

Charles had been preparing for this confrontation since the Battle of Toulouse a decade earlier.[18] Gibbon believes, as do most historians, that Charles had made the best of a bad situation. Though allegedly outnumbered and without any heavy cavalry, he had tough, battle-hardened infantrymen who believed in him implicitly. At a time in the Dark Ages when permanent armies had been non-existent in Europe, Charles even took out a large loan from the Pope after convincing him of the impending emergency, in order to properly train and maintain a full-size army largely composed of professional infantry. Moreover, as Davis points out, these infantrymen were heavily armed.[30]

Formed into a phalanx formation, they were able to withstand a cavalry charge better than might be expected, especially as Charles had secured the high ground – with trees before him to further impede any cavalry charges. The failure of Arab intelligence extended to the fact that they were totally unaware of how good his forces were; he had trained them for a decade. And while he was well aware of the Caliphate's strengths and weaknesses, they knew almost nothing about the Franks.

Furthermore, the Franks were dressed for the cold. The Arabs had very light clothing more suitable for North African winters than European winters.

The battle eventually became a waiting game in which the Muslims did not want to attack an army that could possibly be numerically superior and wanted the Franks to come out into the open. The Franks formed up in a thick defensive formation and waited for them to charge uphill. The battle finally began on the seventh day, as 'Abd-al-Raḥmân did not want to wait any longer, with winter approaching.

Western knight fighting against an Arabian horseman (illustration from the 19th century)

'Abd-al-Raḥmân trusted in the tactical superiority of his cavalry and had them charge repeatedly throughout the day. The disciplined Frankish soldiers withstood the assaults, though according to Arab sources, the Arab cavalry broke into the Frankish square several times. Despite this, the Franks did not break. The well-trained Frankish soldiers accomplished what was not thought possible at that time: infantry withstanding a heavy cavalry charge. Paul Davis says the core of Charles' army was a professional infantry which was both highly disciplined and well-motivated, "having campaigned with him all over Europe".

The Mozarabic Chronicle of 754 "describes the battle in greater detail than any other Latin or Arabic source".[31] It says of the encounter that,

While Abd ar-Rahman was pursuing Odo, he decided to despoil Tours by destroying its palaces and burning its churches. There he confronted the consul of Austrasia by the name of Charles, a man who, having proved himself to be a warrior from his youth and an expert in things military, had been summoned by Odo. After each side had tormented the other with raids for almost seven days, they finally prepared their battle lines and fought fiercely. The northern peoples remained as immobile as a wall, holding together like a glacier in the cold regions. In the blink of an eye, they annihilated the Arabs with the sword. The people of Austrasia, greater in a number of soldiers and formidably armed, killed the king, Abd ar-Rahman, when they found him, striking him on the chest. But suddenly, within sight of the countless tents of the Arabs, the Franks despicably sheathed their swords postponing the fight until the next day since night had fallen during the battle. Rising from their own camp at dawn, the Europeans saw the tents and canopies of the Arabs all arranged just as they had appeared the day before. Not knowing that they were empty and thinking that inside them there were Saracen forces ready for battle, they sent officers to reconnoiter and discovered that all the Ishmaelite troops had left. They had indeed fled silently by night in tight formation, returning to their own country.

— Wolf (trans.), Chronicle of 754, p. 145

Charles Martel's family composed, for the fourth book of the Continuations of Fredegar's Chronicle, a stylized summary of the battle:

Prince Charles boldly drew up his battle lines against them [the Arabs] and the warrior rushed in against them. With Christ's help, he overturned their tents and hastened to battle to grind them small in slaughter. The king Abdirama having been killed, he destroyed [them], driving forth the army, he fought and won. Thus did the victor triumph over his enemies.

— Fouracre, Continuations of Fredegar, p. 149

This source details further that "he (Charles Martel) came down upon them like a great man of battle". It goes on to say Charles "scattered them like the stubble".

The Latin word used for "warrior", belligerator, "is from the Book of Maccabees, chapters 15 and 16", which describe huge battles.[32]

It is thought that Bede's Ecclesiastical History of the English People (Book V, Chapter XXIV) includes a reference to the Battle of Tours: "... a dreadful plague of Saracens ravaged France with miserable slaughter, but they not long after in that country received the punishment due to their wickedness".[33]

Gibbon makes the point that 'Abd-al-Raḥmân did not move at once against Charles Martel, and was surprised by him at Tours as Charles had marched over the mountains avoiding the roads to surprise the Muslim invaders. Thus, Charles selected the time and place they would collide.

'Abd-al-Raḥmân was a good general, but failed to do two things he should have done before the battle:

• He either assumed that the Franks would not come to the aid of their Aquitanian rivals, or did not care, and he thus failed to assess their strength before the invasion.
• He failed to scout the movements of the Frankish army.

These failures disadvantaged the Muslim army in the following ways:

• The invaders were burdened with booty that played a role in the battle.
• They had casualties before they fought the battle.
• Weaker opponents such as Odo were not bypassed, whom they could have picked off at will later, while moving at once to force battle with the real power in Europe and at least partially pick the battlefield.

While some military historians point out that leaving enemies in your rear is not generally wise, the Mongols proved that indirect attack, and bypassing weaker foes to eliminate the strongest first, can be a devastatingly effective mode of invasion. In this case, those enemies were virtually no danger, given the ease with which the Muslims destroyed them. The real danger was Charles, and the failure to scout Gaul adequately was disastrous.

According to Creasy,[34] both western and Muslim histories agree the battle was hard fought, and that the Umayyad heavy cavalry had broken into the square, but agreed that the Franks were in formation still strongly resisting.

Charles could not afford to stand idly by while Frankish territories were threatened. He would have to face the Umayyad armies sooner or later, and his men were enraged by the utter devastation of the Aquitanians and wanted to fight. But Sir Edward Creasy noted that,

when we remember that Charles had no standing army, and the independent spirit of the Frank warriors who followed his standard, it seems most probable that it was not in his power to adopt the cautious policy of watching the invaders, and wearing out their strength by delay. So dreadful and so widespread were the ravages of the Saracenic light cavalry throughout Gaul, that it must have been impossible to restrain for any length of time the indignant ardor of the Franks. And, even if Charles could have persuaded his men to look tamely on while the Arabs stormed more towns and desolated more districts, he could not have kept an army together when the usual period of a military expedition had expired.[35]

Both Hallam and Watson[31] argue that had Charles failed, there was no remaining force to protect Western Europe. Hallam perhaps said it best: "It may justly be reckoned among those few battles of which a contrary event would have essentially varied the drama of the world in all its subsequent scenes: with Marathon, Arbela, the Metaurus, Châlons and Leipzig."[36]

Strategically, and tactically, Charles probably made the best decision he could in waiting until his enemies least expected him to intervene, and then marching by stealth to catch them by surprise at a battlefield of his choosing. Probably he and his own men did not realize the seriousness of the battle they had fought, as one historian put it: "few battles are remembered over 1,000 years after they are fought, but the Battle of [Tours-Poitiers] is an exception ... Charles Martel turned back a Muslim raid that had it been allowed to continue, might have conquered Gaul."[37] Roger Collins disputes interpretations of ever-expanding Umayyad forces, reminding their internal cohesion problems and the capture of Autun in 725, when the Burgundian stronghold was captured and sacked, then just abandoned by Anbasa's raiding forces.[38]

The Umayyad army retreated south over the Pyrenees.[39] Charles continued to expand south in subsequent years. After the death of Odo (c. 735), who had reluctantly acknowledged Charles' suzerainty in 719, Charles wished to unite Odo's duchy to himself and went there to elicit the proper homage of the Aquitanians. But the nobility proclaimed Hunald, Odo's son, as the Duke, and Charles recognized his legitimacy when the Umayyads entered Provence as part of an alliance with Duke Maurontus the next year.[40]

Hunald, who originally resisted acknowledging Charles as an overlord, soon had little choice. He acknowledged Charles as his overlord, albeit not for long, and Charles confirmed his Duchy.

In 735, the new governor of al-Andalus again invaded Gaul. Antonio Santosuosso and other historians detail how the new governor of Al-Andalus, Uqba ibn al-Hajjaj, again moved into France to avenge the defeat at Tours and to spread Islam. According to Santosuosso, Uqba ibn al-Hajjaj converted about 2,000 Christians he captured over his career. In the last major attempt at an invasion of Gaul through Iberia, a sizable expedition was assembled at Saragossa and entered what is now French territory in 735, crossed the River Rhone, and captured and looted Arles. From there, he struck into the heart of Provence, ending with the capture of Avignon, despite strong resistance.[41]

Uqba ibn al-Hajjaj's forces remained in Septimania and part of Provence for four years carrying raids to Lyons, Burgundy, and Piedmont. Charles Martel invaded Septimania in two campaigns in 736 and 739, but was forced back again to Frankish territory under his control. Alessandro Santosuosso strongly argues that the second (Umayyad) expedition was probably more dangerous than the first. The second expedition's failure put an end to any serious Muslim expedition across the Pyrenees, although raids continued. Plans for further large-scale attempts were hindered by internal turmoil in the Umayyad lands which often made enemies out of their own kind.[41]

Despite the defeat at Tours, the Umayyads remained in control of Narbonne and Septimania for another 27 years, though they could not expand further. The treaties reached earlier with the local population stood firm and were further consolidated in 734 when the governor of Narbonne, Yusuf ibn Abd al-Rahman al-Fihri, concluded agreements with several towns on common defense arrangements against the encroachments of Charles Martel, who had systematically brought the south to heel as he extended his domains. He conquered Umayyad fortresses and destroyed their garrisons at the Siege of Avignon and the Siege of Nîmes.

The army attempting to relieve Narbonne met Charles in open battle at the Battle of the River Berre and was destroyed. However, Charles failed in his attempt to take Narbonne at the Siege of Narbonne in 737, when the city was jointly defended by its Muslim Arab and Berber, and its Christian Visigothic citizens.

Reluctant to tie down his army for a siege that could last years, and believing he could not afford the losses of an all-out frontal assault such as he had used at Arles, Charles was content to isolate the few remaining invaders in Narbonne and Septimania. The threat of invasion was diminished after the Umayyad defeat at Narbonne, and the unified Caliphate would collapse into civil war in 750 at the Battle of the Zab.

It was left to Charles' son, Pepin the Short, to force Narbonne's surrender in 759, thus bringing Narbonne into the Frankish domains. The Umayyad dynasty was expelled, driven back to Al-Andalus where Abd al-Rahman I established an emirate in Córdoba in opposition to the Abbasid Caliph in Baghdad.

In the northeast of Spain the Frankish emperors established the Marca Hispanica across the Pyrenees in part of what today is Catalonia, reconquering Girona in 785 and Barcelona in 801. This formed a buffer zone against Muslim lands across the Pyrenees. Historian J.M. Roberts said in 1993 of the Carolingian Dynasty:

It produced Charles Martel, the soldier who turned the Arabs back at Tours, and the supporter of Saint Boniface the Evangelizer of Germany. This is a considerable double mark to have left on the history of Europe.[42]

Before the Battle of Tours, stirrups may have been unknown in the west. Lynn Townsend White Jr. argues that the adoption of the stirrup for cavalry was the direct cause for the development of feudalism in the Frankish realm by Charles Martel and his heirs.[43]

The first wave of modern historians, especially scholars on Rome and the medieval period, such as Edward Gibbon, contended that had Charles fallen, the Umayyad Caliphate would have easily conquered a divided Europe. Gibbon famously observed:

A victorious line of march had been prolonged above a thousand miles from the rock of Gibraltar to the banks of the Loire; the repetition of an equal space would have carried the Saracens to the confines of Poland and the Highlands of Scotland; the Rhine is not more impassable than the Nile or Euphrates, and the Arabian fleet might have sailed without a naval combat into the mouth of the Thames. Perhaps the interpretation of the Koran would now be taught in the schools of Oxford, and her pulpits might demonstrate to a circumcised people the sanctity and truth of the revelation of Mahomet.[44]

Nor was Gibbon alone in lavishing praise on Charles as the savior of Christendom and western civilization. H. G. Wells wrote: "The Moslim [sic] when they crossed the Pyrenees in 720 found this Frankish kingdom under the practical rule of Charles Martel, the Mayor of the Palace of a degenerate descendant of Clovis, and experienced the decisive defeat of [Tours-Poitiers] (732) at his hands. This Charles Martel was practically overlord of Europe north of the Alps from the Pyrenees to Hungary. He ruled over a multitude of subordinate lords speaking French-Latin and High and Low German languages."[45]

Gibbon was echoed a century later by the Belgian historian Godefroid Kurth, who wrote that the Battle of Tours "must ever remain one of the great events in the history of the world, as upon its issue depended whether Christian Civilization should continue or Islam prevail throughout Europe."[46]

German historians were especially ardent in their praise of Charles Martel; Schlegel speaks of this "mighty victory",[47] and tells how "the arm of Charles Martel saved and delivered the Christian nations of the West from the deadly grasp of all-destroying Islam." Creasy quotes Leopold von Ranke's opinion that this period was

one of the most important epochs in the history of the world, the commencement of the eighth century, when on the one side Mohammedanism threatened to overspread Italy and Gaul, and on the other the ancient idolatry of Saxony and Friesland once more forced its way across the Rhine. In this peril of Christian institutions, a youthful prince of Germanic race, Karl Martell, arose as their champion, maintained them with all the energy which the necessity for self-defense calls forth, and finally extended them into new regions.[47]

The German military historian Hans Delbrück said of this battle "there was no more important battle in the history of the world." (The Barbarian Invasions, p. 441.) Had Charles Martel failed, Henry Hallam argued, there would have been no Charlemagne, no Holy Roman Empire or Papal States; all these depended upon Charles's containment of Islam from expanding into Europe while the Caliphate was unified and able to mount such a conquest. Another great mid era historian, Thomas Arnold, ranked the victory of Charles Martel even higher than the victory of Arminius in its impact on all of modern history: "Charles Martel's victory at Tours was among those signal deliverances which have affected for centuries the happiness of mankind."[48] Louis Gustave and Charles Strauss said "The victory gained was decisive and final, The torrent of Arab conquest was rolled back and Europe was rescued from the threatened yoke of the Saracens."[49]

Charles Oman concluded that:

At [Tours-Poitiers] the Franks fought as they had done two hundred years before at Casilinum, in one solid mass, without breaking rank or attempting to maneuver. Their victory was won by the purely defensive tactics of the infantry square; the fanatical Arabs, dashing against them time after time, were shattered to pieces, and at last, fled under the shelter of night. But there was no pursuit, for Charles had determined not to allow his men to stir a step from the line to chase the broken foe.[50]

John Bagnell Bury, writing at the beginning of the 20th century, said "The Battle of Tours ... has often been represented as an event of the first magnitude for the world's history, because after this, the penetration of Islam into Europe was finally brought to a standstill."[51]

Modern Western historians are clearly divided on the importance of the battle, and where it should rank in military history; see below.

Albert Speer, Hitler's Armaments Minister, described how Hitler expressed approval of Islam, saying that Hitler had been particularly impressed by what he had heard from a delegation of Arabs. When the Arabs had tried to penetrate Central Europe in the 8th century, they had been driven back at the Battle of Tours; if they had won that battle, the world would have become Muslim (maybe). Theirs was a religion, Hitler said, that believed in spreading the faith by the sword and subjugating all nations to that faith. Hitler considered that Islam was perfectly suited to the "Germanic" temperament and would have been more compatible to the Germans than Christianity.[52]

Eastern historians, like their Western counterparts, have not always agreed on the importance of the battle. According to Bernard Lewis, "The Arab historians, if they mention this engagement [the Battle of Tours] at all, present it as a minor skirmish,"[53] and Gustave von Grunebaum writes: "This setback may have been important from the European point of view, but for Muslims at the time, who saw no master plan imperiled thereby, it had no further significance."[54] Contemporary Arab and Muslim historians and chroniclers were much more interested in the second Umayyad siege of Constantinople in 718, which ended in a disastrous defeat.

However, Creasy has claimed: "The enduring importance of the battle of Tours in the eyes of the Muslims is attested not only by the expressions of 'the deadly battle' and 'the disgraceful overthrow' which their writers constantly employ when referring to it but also by the fact that no more serious attempts at conquest beyond the Pyrenees were made by the Saracens."

Thirteenth-century Moroccan author Ibn Idhari al-Marrakushi, mentioned the battle in his history of the Maghrib, "al-Bayan al-Mughrib fi Akhbar al-Maghrib." According to Ibn Idhari, "Abd ar-Rahman and many of his men found martyrdom on the balat ash-Shuhada'i (the path of the martyrs)." Antonio Santosuosso points that "they (the Muslims) called the battle's location, the road between Poitiers and Tours, 'the pavement of Martyrs'."[41] However, as Henry Coppée pointed out, "The same name was given to the battle of Toulouse and is applied to many other fields on which the Moslemah were defeated: they were always martyrs for the faith."[55]

Khalid Yahya Blankinship argued that the military defeat at Tours was one of the failures that contributed to the decline of the Umayyad caliphate:

Stretching from Morocco to China, the Umayyad caliphate based its expansion and success on the doctrine of jihad – armed struggle to claim the whole earth for God's rule, a struggle that had brought much material success for a century but suddenly ground to a halt followed by the collapse of the ruling Umayyad dynasty in 750 AD. The End of the Jihad State demonstrates for the first time that the cause of this collapse came not just from internal conflict, as has been claimed, but from a number of external and concurrent factors that exceeded the caliphate's capacity to respond. These external factors began with crushing military defeats at Byzantium, Toulouse, and Tours, which led to the Berber Revolt of 740 in Iberia and Northern Africa.

Ninth-century chroniclers recorded the outcome of the battle as a divine judgment in favor of Charles and gave him the nickname Martellus ("The Hammer"). Later Christian chroniclers and pre-20th century historians praised Charles Martel as the champion of Christianity, characterizing the battle as the decisive turning point in the struggle against Islam, a struggle which preserved Christianity as the religion of Europe. According to modern military historian, Victor Davis Hanson "most of the 18th and 19th century historians like Gibbon saw Tours as a landmark battle that marked the high tide of the Muslim advance into Europe."[56] Leopold von Ranke felt that Tours-Poitiers "was the turning point of one of the most important epochs in the history of the world."[57]

William E. Watson writes that "the subsequent history of the West would have proceeded along vastly different currents had 'Abd ar-Rahman been victorious at Tours-Poitiers in 732" and that "[a]fter examining the motives for the Muslim drive north of the Pyrenees, one can attach a macrohistorical significance to the encounter ... especially when one considers the attention paid to the Franks in Arabic literature and the successful expansion of Muslims elsewhere in the medieval period."[31]

Victorian writer John Henry Haaren says in Famous Men of the Middle Ages "The battle of Tours or Poitiers as it should be called is regarded as one of the decisive battles of the world. It decided that Christians and not Muslims should be the ruling power in Europe."[58] Bernard Grun delivers this assessment in his "Timetables of History", reissued in 2004: "In 732 Charles Martel's victory over the Arabs at the Battle of Tours stems the tide of their westward advance."[59]

Historian and humanist Michael Grant lists the battle of Tours in the macrohistorical dates of the Roman era. Historian Norman Cantor who specialized in the medieval period, teaching and writing at Columbia and New York University said in 1993: "It may be true that the Arabs had now fully extended their resources and they would not have conquered France, but their defeat (at Tours) in 732 put a stop to their advance to the North."[60]

Military historian Robert W. Martin considers Tours "one of the most decisive battles in all of history."[61] Additionally, historian Hugh Kennedy says "it was clearly significant in establishing the power of Charles Martel and the Carolingians in France, but it also had profound consequences in Muslim Spain. It signaled the end of the ghanima (booty) economy."[62]

Military Historian Paul Davis argued in 1999 "had the Muslims been victorious at Tours, it is difficult to suppose what population in Europe could have organized to resist them."[17] Likewise, George Bruce in his update of Harbottle's classic military history Dictionary of Battles maintains that "Charles Martel defeated the Moslem army effectively ending Moslem attempts to conquer western Europe."[63]

History professor Antonio Santosuosso comments on Charles, Tours, and the subsequent campaigns against Rahman's son in 736–737, that these later defeats of invading Muslim armies were at least as important as Tours in their defense of Western Christendom and its monasteries, the centers of learning that ultimately led Europe out of her Middle Ages. He also makes an argument, after studying the Arab histories of the period, that these were armies of invasion sent by the Caliph not just to avenge Tours, but to begin the end of Christian Europe and bring it into the Caliphate.

Professor of religion Huston Smith says in The World's Religions: Our Great Wisdom Traditions "But for their defeat by Charles Martel in the Battle of Tours in 733, the entire Western world might today be Muslim." Historian Robert Payne on page 142 in The History of Islam said "The more powerful Muslims and the spread of Islam were knocking on Europe's door. And the spread of Islam was stopped along the road between the towns of Tours and Poitiers, France, with just its head in Europe."

Victor Davis Hanson has commented that

Recent scholars have suggested [Tours-Poitiers], so poorly recorded in contemporary sources, was a mere raid and thus a construct of western mythmaking or that a Muslim victory might have been preferable to continued Frankish dominance. What is clear is that [Tours-Poitiers] marked a general continuance of the successful defense of Europe, (from the Muslims). Flush from the victory at Tours, Charles Martel went on to clear southern France from Islamic attackers for decades, unify the warring kingdoms into the foundations of the Carolingian Empire, and ensure ready and reliable troops from local estates.[64]

Paul Davis, another modern historian, says "whether Charles Martel saved Europe for Christianity is a matter of some debate. What is sure, however, is that his victory ensured that the Franks would dominate Gaul for more than a century."[65] Davis writes, "Moslem defeat ended the Moslems' threat to western Europe, and Frankish victory established the Franks as the dominant population in western Europe, establishing the dynasty that led to Charlemagne."[66]

Other historians disagree with this assessment. Alessandro Barbero writes, "Today, historians tend to play down the significance of the battle of [Tours-Poitiers], pointing out that the purpose of the Muslim force defeated by Charles Martel was not to conquer the Frankish kingdom, but simply to pillage the wealthy monastery of St-Martin of Tours".[67] Similarly, Tomaž Mastnak writes:

Modern historians have constructed a myth presenting this victory as having saved Christian Europe from the Muslims. Edward Gibbon, for example, called Charles Martel the savior of Christendom and the battle near Poitiers an encounter that changed the history of the world. ... This myth has survived well into our own times. ... Contemporaries of the battle, however, did not overstate its significance. The continuators of Fredegar's chronicle, who probably wrote in the mid-eighth century, pictured the battle as just one of many military encounters between Christians and Saracens – moreover, as only one in a series of wars fought by Frankish princes for booty and territory. ... One of Fredegar's continuators presented the battle of [Tours-Poitiers] as what it really was: an episode in the struggle between Christian princes as the Carolingians strove to bring Aquitaine under their rule.[68]

The historian Philip Khuri Hitti believes that "In reality, nothing was decided on the battlefield of Tours. The Moslem wave, already a thousand miles from its starting point in Gibraltar – to say nothing about its base in al-Qayrawan – had already spent itself and reached a natural limit."[69]

The view that the battle has no great significance is perhaps best summarized by Franco Cardini in Europe and Islam:

Although prudence needs to be exercised in minimizing or 'demythologizing' the significance of the event, it is no longer thought by anyone to have been crucial. The 'myth' of that particular military engagement survives today as a media cliché, than which nothing is harder to eradicate. It is well known how the propaganda put about by the Franks and the papacy glorified the victory that took place on the road between Tours and Poitiers...[70]

In their introduction to The Reader's Companion to Military History Robert Cowley and Geoffrey Parker summarise this side of the modern view of the Battle of Tours by saying:

The study of military history has undergone drastic changes in recent years. The old drums-and-bugles approach will no longer do. Factors such as economics, logistics, intelligence, and technology receive the attention once accorded solely to battles and campaigns and casualty counts. Words like "strategy" and "operations" have acquired meanings that might not have been recognizable a generation ago. Changing attitudes and new research have altered our views of what once seemed to matter most. For example, several of the battles that Edward Shepherd Creasy listed in his famous 1851 book The Fifteen Decisive Battles of the World rate hardly a mention here, and the confrontation between Muslims and Christians at Poitiers-Tours in 732, once considered a watershed event, has been downgraded to a raid in force.[71]