Charles Martel (c. 686 – 22 October 741) was a Frankish statesman and military leader who as Duke and Prince of the Franks and Mayor of the Palace, was de facto ruler of Francia from 718 until his death.    The son of the Frankish statesman Pepin of Herstal and a noblewoman named Alpaida, Charles successfully asserted his claims to power as successor to his father as the power behind the throne in Frankish politics. Continuing and building on his father's work, he restored centralized government in Francia and began the series of military campaigns that re-established the Franks as the undisputed masters of all Gaul.
After work to establish a unity in Gaul, Charles' attention was called to foreign conflicts, and dealing with the Islamic advance into Western Europe was a foremost concern. Arab and Berber Islamic forces had conquered Spain (711), crossed the Pyrenees (720), seized a major dependency of the Visigoths (721–725), and after intermittent challenges, under Abdul Rahman Al Ghafiqi, the Arab Governor of al-Andalus, advanced toward Gaul and on Tours, "the holy town of Gaul"; in October 732, the army of the Umayyad Caliphate led by Al Ghafiqi met Frankish and Burgundian forces under Charles in an area between the cities of Tours and Poitiers (modern north-central France), leading to a decisive, historically important Frankish victory known as the Battle of Tours (or ma'arakat Balâṭ ash-Shuhadâ , Battle of the Palace of Martyrs), ending the "last of the great Arab invasions of France," a military victory termed "brilliant" on the part of Charles.  
Charles further took the offensive after Tours, destroying fortresses at Agde, Béziers and Maguelonne, and engaging Islamic forces at Nimes, though ultimately failing to recover Narbonne (737) or to fully reclaim the Visigoth's Narbonensis.  He thereafter made significant further external gains against fellow Christian realms, establishing Frankish control over Bavaria, Alemannia, and Frisia, and compelling some of the Saxon tribes to offer tribute (738). 
Apart from the military endeavours, Charles is considered to be a founding figure of the European Middle Ages. Skilled as an administrator as well as a warrior, he is credited with a seminal role in the emerging responsibilities of the knights of courts, and so in the development of the Frankish system of feudalism. Pope Gregory III, whose realm was being menaced by the Lombards, and who could no longer rely on help from Constantinople, asked Charles to defend the Holy See and offered him the Roman consulship, though Charles declined. 
He divided Francia between his sons Carloman and Pepin. The latter became the first of the Carolingians. Charles' grandson, Charlemagne, extended the Frankish realms to include much of the West, and became the first Emperor in the West since the fall of Rome. 
In older historiography, it was common to describe Charles as "illegitimate". This is still widely repeated in popular culture today. But, polygamy was a legitimate Frankish practice at the time and it is unlikely that Charles was considered "illegitimate". It is likely that the interpretation of "illegitimacy" derives from the desire of Pepin's first wife Plectrude to see her progeny as heirs to Pepin's power.
After the reign of Dagobert I (629–639) the Merovingians effectively ceded power to the Pippinid Mayors of the Palace, who ruled the Frankish realm of Austrasia in all but name. They controlled the royal treasury, dispensed patronage, and granted land and privileges in the name of the figurehead king. Charles' father, Pepin of Herstal, was able to unite the Frankish realm by conquering Neustria and Burgundy. He was the first to call himself Duke and Prince of the Franks, a title later taken up by Charles.
Contesting for power
In December 714, Pepin of Herstal died.  Prior to his death, he had, at his wife Plectrude's urging, designated Theudoald, his grandson by their late son Grimoald, his heir in the entire realm. This was immediately opposed by the nobles because Theudoald was a child of only eight years of age. To prevent Charles using this unrest to his own advantage, Plectrude had him imprisoned in Cologne, the city which was destined to be her capital. This prevented an uprising on his behalf in Austrasia, but not in Neustria.
Civil war of 715–718
Pippin's death occasioned open conflict between his heirs and the Neustrian nobles who sought political independence from Austrasian control. In 715, Dagobert III named Ragenfrid mayor of their palace. On 26 September 715, Ragenfrid's Neustrians met the young Theudoald's forces at the Battle of Compiegne. Theudoald was defeated and fled back to Cologne. Before the end of the year, Charles Martel had escaped from prison and been acclaimed mayor by the nobles of Austrasia.  That same year, Dagobert III died and the Neustrians proclaimed Chilperic II, the cloistered son of Childeric II, as king.
Battle of Cologne
In 716, Chilperic and Ragenfrid together led an army into Austrasia intent on seizing the Pippinid wealth at Cologne. The Neustrians allied with another invading force under Radbod, King of the Frisians and met Charles in battle near Cologne, which was still held by Plectrude. Charles had little time to gather men, or prepare, and the result was the only defeat of his career. The Frisians held off Charles, while the king and his mayor besieged Plectrude at Cologne, where she bought them off with a substantial portion of Pepin's treasure. Then they withdrew. 
Battle of Amblève
Charles retreated to the hills of the Eifel to gather men, and train them. Having made the proper preparations, in April 716, he fell upon the triumphant army near Malmedy as it was returning to its own province. In the ensuing Battle of Amblève, Martel attacked as the enemy rested at midday. According to one source, he split his forces into several groups which fell at them from many sides.  Another suggests that while this was his intention, he then decided, given the enemy's unpreparedness, this was not necessary. In any event, the suddenness of the assault lead them to believe they were facing a much larger host. Many of the enemy fled and Martel's troops gathered the spoils of the camp. Martel's reputation increased considerably as a result, and he attracted more followers.
In this battle, Charles set a pattern for the remainder of his military career. He appeared where his enemies least expected him, while they were marching triumphantly home and far outnumbered him. He also attacked when least expected, at midday, when armies of that era traditionally were resting. Finally, he attacked them how they least expected it, by feigning a retreat to draw his opponents into a trap. The feigned retreat, next to unknown in Western Europe at that time—it was a traditionally eastern tactic—required both extraordinary discipline on the part of the troops and exact timing on the part of their commander. The result was an unbroken victory streak that lasted until his death.
Battle of Vincy
Richard Gerberding points out that up to this time, much of Martel's support was probably from his mother's kindred in the lands around Liege. After Amblève, he seems to have won the backing of the influential Willibrord, founder of the Abbey of Echternach. The abbey had been built on land donated by Plectrude's mother, Irmina of Oeren, but most of Willibrord's missionary work had been carried out in Frisia. In joining Chilperic and Ragenfrid, Radbod of Frisia sacked Utrecht, burning churches and killing many missionaries. Willibrord and his monks were forced to flee to Echternach. Gerberding suggests that Willibrord had decided that the chances of preserving his life's work were better with a successful field commander like Martel than with Plectrude in Cologne. Willibrord subsequently baptized Martel's son Pepin. Gerberding suggests a likely date of Easter 716.  Martel also received support from Bishop Pepo of Verdun.
Charles took time to rally more men and prepare. By the following spring, Charles had attracted enough support to invade Neustria. Charles sent an envoy who proposed a secession of hostilities if Chilperic would recognize his rights as mayor of the palace in Austrasia. The refusal was not unexpected but served to impress upon Martel's forces the unreasonableness of the Neustrians. They met near Cambrai at the Battle of Vincy on 21 March 717. The victorious Martel pursued the fleeing king and mayor to Paris, but as he was not yet prepared to hold the city, he turned back to deal with Plectrude and Cologne. He took the city and dispersed her adherents. Plectrude was allowed to retire to a convent; Theudoald lived to 741 under his uncle's protection, a kindness—unusual for those times, when mercy to a former gaoler, or a potential rival, was rare.
Consolidation of power
In 718, Chilperic responded to Charles' new ascendancy by making an alliance with Odo the Great (or Eudes, as he is sometimes known), the duke of Aquitaine, who had become independent during the civil war in 715, but was again defeated, at the Battle of Soissons, by Charles.  Chilperic fled with his ducal ally to the land south of the Loire and Ragenfrid fled to Angers. Soon Clotaire IV died and Odo surrendered King Chilperic in exchange for Martel recognising his dukedom. Charles recognised Chilperic as king of the Franks in return for legitimate royal affirmation of his own mayoralty over all the kingdoms.
Wars of 718–732
Between 718 and 723, Charles secured his power through a series of victories: he won the loyalty of several important bishops and abbots by donating lands and money for the foundation of abbeys, he subjugated Bavaria and Alemannia. Having unified the Franks under his banner, Charles was determined to punish the Saxons who had invaded Austrasia. Therefore, late in 718, he laid waste their country to the banks of the Weser, the Lippe, and the Ruhr.  He defeated them in the Teutoburg Forest and thus secured the borders—in the name of King Clotaire.
Radbod died in 719. Charles seized West Frisia without any great resistance on the part of the Frisians, who had been subjects of the Franks but had rebelled upon the death of Pippin. When Chilperic II died the following year (720), Charles appointed as his successor the son of Dagobert III, Theuderic IV, who was still a minor, and who occupied the throne from 720 to 737. Charles was now appointing the kings whom he supposedly served, rois fainéants who were mere figureheads; by the end of his reign he didn't appoint one at all. At this time, Charles again marched against the Saxons. Then the Neustrians rebelled under Ragenfrid, who had left the county of Anjou. They were easily defeated (724), but Ragenfrid gave up his sons as hostages in turn for keeping his county. This ended the civil wars of Charles' reign.
The next six years were devoted in their entirety to assuring Frankish authority over the dependent Germanic tribes. Between 720 and 723, Charles was fighting in Bavaria, where the Agilolfing dukes had gradually evolved into independent rulers, recently in alliance with Liutprand the Lombard. He forced the Alemanni to accompany him, and Duke Hugbert submitted to Frankish suzerainty. In 725 he brought back the Agilolfing princess Swanachild as a second wife.
In 725 and 728, he again entered Bavaria. In 730, he marched against Lantfrid, duke of Alemannia, who had also become independent, and killed him in battle. He forced the Alemanni capitulation to Frankish suzerainty and did not appoint a successor to Lantfrid. Thus, southern Germany once more became part of the Frankish kingdom, as had northern Germany during the first years of the reign.
Prelude to Tours
By 721, the emir of Córdoba had built up a strong army from Morocco, Yemen, and Syria to conquer Aquitaine. The large duchy in southwest Gaul was nominally under Frankish sovereignty, but in fact was almost independent under Odo the Great, Duke of Aquitaine. The invading Muslims besieged Toulouse, then Aquitaine's most important city. Odo, who was not in the city at that time, left to seek help. After Odo's escape the Muslims had become overconfident and failed to maintain defenses or scout patrols.
Returning three months later, Odo was in time to prevent the city's surrender and defeated the Muslim invaders on June 9, 721, at the Battle of Toulouse (721). Odo's forces launched a surprise assault on the Umayyad forces, simultaneously from behind and from within the walls . The surprised besiegers scattered and fled.
By 730 Abdul Rahman Al Ghafiqi, who had been at Toulouse, was the emir of Cordoba. The Arab Chronicles make clear he had strongly opposed his predecessor's decision not to secure outer defenses against a relief force, which allowed Odo's force to attack with impunity before the Islamic cavalry could assemble or mount.
Raising an army
Historian Paul K. Davis wrote, "Having defeated Eudes, he turned to the Rhine to strengthen his northeastern borders—but in 725 was diverted south with the activity of the Muslims in Acquitane."  Charles then concentrated his attention to the Umayyads, virtually for the remainder of his life. Due to the situation in Iberia, Charles believed he needed a full-time army—one he could train intensely—as a core of veteran Franks who would be augmented with the usual conscripts called up in time of war. (During the Early Middle Ages, troops were only available after the crops had been planted and before harvesting time.) To train the kind of infantry that could withstand the Muslim heavy cavalry, Charles needed them year-round, and he needed to pay them so their families could buy the food they would have otherwise grown.
To obtain money he seized church lands and property, and used the funds to pay his soldiers. The same Charles who had secured the support of the ecclesia by donating land, seized some of it back between 724 and 732. For a time, it looked as though Charles might even be excommunicated for his actions. But then came a significant invasion.
The Muslims were not aware, at that time, of the true strength of the Franks, or the fact that they were building a disciplined army instead of the typical barbarian hordes that had dominated Europe after Rome's fall. The Arab Chronicles, the history of that age, show that Arab awareness of the Franks as a growing military power came only after the Battle of Tours when the Caliph expressed shock at his army's catastrophic defeat.
Battle of Tours in 732
In 731, after defeating the Saxons, Martel, turned his attention to the rival southern realm of Aquitaine, and crossed the Loire, breaking the treaty with Odo. The Franks ransacked Aquitaine twice, and captured Bourges, although Odo retook it. Thus occupied, Odo was unable to come to the assistance of his ally, the Berber rebel lord Uthman ibn Naissa, who hearing of the oppression of Berbers in North Africa, had negotiated a peace treaty with Odo. After a brief battle, Uthman ibn Naissa was defeated and executed by Abd al-Rahman al-Ghafiqi.
Abdul Rahman next proceeded through Gascony all the way to Bordeaux, capturing the city. Odo engaged Abdul Rahman on the Garonne River at the Battle of Bordeaux, but was defeated. The Umayyads looted the rich monasteries of northern Aquitaine before resuming their march towards Tours, a town said to be holding abundant wealth and treasures. This plundering gave Odo enough time to re-organise his Aquitanian troops and warn Charles Martel of the impending danger.
It was under one of their ablest and most renowned commanders, with a veteran army, and with every apparent advantage of time, place, and circumstance, that the Arabs made their great effort at the conquest of Europe north of the Pyrenees. 
Odo and his remaining Aquitanian nobles formed the right flank of Charles's forces at Tours. In the midst of the fighting a rumour went through the Umayyad army that Frankish scouts threatened the booty that they had taken from Bordeaux. Odo set fire to the Umayyad encampment.  : 281 Some of the Umayyad cavalry troops at once broke off the battle and returned to camp to secure their loot. To the rest of the Muslim army, this appeared to be a full-scale retreat, and soon it became one. While trying to stop the retreat, 'Abd-al-Raḥmân became surrounded, which led to his death, and the Umayyad troops then withdrew altogether to their camp. The Franks held their position, believing the battle would resume the following morning. Come morning, Frankish scouts discovered that the Umayyad force had withdrawn during the night.
"The victory at the battle near Poitiers and Tours would later earn Charles the cognomen "Martellus" (L., and so "Martel", Fr.: "the hammer") from 9th century chroniclers who, in the view of Pierre Riche, "seem to have been… recalling Judas Maccabaeus, 'the Hammerer,'" of 1 Maccabees, "whom God had similarly blessed with victory" ...."  : 44
Twelve years later, when Charles had thrice rescued Gaul from Umayyad invasions, Antonio Santosuosso noted when he destroyed an Umayyad army sent to reinforce the invasion forces of the 735 campaigns, "Charles Martel again came to the rescue."  : TBD
It is important to note, however, that modern Western historians, military historians, and writers, essentially fall into three camps. The first, those who believe Gibbon was right in his assessment that Charles saved Christianity and Western civilization by this battle, as typified by Bennett, Paul Davis, Robert Martin, and educator Dexter B. Wakefield, who writes in An Islamic Europe? :
A Muslim France? Historically, it nearly happened. But as a result of Charles’ fierce opposition, which ended Muslim advances and set the stage for centuries of war thereafter, Islam moved no farther into Europe. European schoolchildren learn about the Battle of Tours in much the same way that American students learn about Valley Forge and Gettysburg." 
The second camp of contemporary historians believe that a failure by Charles at Tours could have been a disaster, destroying what would become Western civilization after the Renaissance. Certainly all historians agree that no power would have remained in Europe able to halt Islamic expansion had the Franks failed: William E. Watson strongly supports Tours as a macrohistorical event, but distances himself from the rhetoric of Gibbon and Drubeck, writing of the battle's importance in Frankish and world history in 1993:
There is clearly some justification for ranking Tours-Poitiers among the most significant events in Frankish history when one considers the result of the battle in light of the remarkable record of the successful establishment by Muslims of Islamic political and cultural dominance along the entire eastern and southern rim of the former Christian, Roman world. The rapid Muslim conquest of Palestine, Syria, Egypt and the North African coast all the way to Morocco in the seventh century resulted in the permanent imposition by force of Islamic culture onto a previously Christian and largely non-Arab base. The Visigothic kingdom fell to Muslim conquerors in a single battle at the Battle of Guadalete on the Rio Barbate in 711, and the Hispanic Christian population took seven long centuries to regain control of the Iberian Peninsula. The Reconquista, of course, was completed in 1492, only months before Columbus received official backing for his fateful voyage across the Atlantic Ocean. Had Charles Martel suffered at Tours-Poitiers the fate of King Roderick at the Rio Barbate, it is doubtful that a "do-nothing" sovereign of the Merovingian realm could have later succeeded where his talented major domus had failed. Indeed, as Charles was the progenitor of the Carolingian line of Frankish rulers and grandfather of Charlemagne, one can even say with a degree of certainty 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. 
The final camp of Western historians believe that the importance of the battle is dramatically overstated. This view is typified by Alessandro Barbero, who writes, "Today, historians tend to play down the significance of the battle of Poitiers, pointing out that the purpose of the Arab force defeated by Charles Martel was not to conquer the Frankish kingdom, but simply to pillage the wealthy monastery of St-Martin of Tours".  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 Poitiers as what it really was: an episode in the struggle between Christian princes as the Carolingians strove to bring Aquitaine under their rule. 
However, it is vital to note, when assessing Charles Martel's life, that even those historians who dispute the significance of this one battle as the event that saved Christianity, do not dispute that Charles himself had a huge effect on Western European history. Modern military historian Victor Davis Hanson acknowledges the debate on this battle, citing historians both for and against its macrohistorical placement:
Recent scholars have suggested Poitiers, so poorly recorded in contemporary sources, was a mere raid and thus a construct of western myth-making or that a Muslim victory might have been preferable to continued Frankish dominance. What is clear is that 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. : 167
In the modern era, Matthew Bennett argues that "few battles are remembered 1,000 years after they are fought ... but the Battle of Poitiers, (Tours) is an exception ... Charles Martel turned back a Muslim raid that, had it been allowed to continue, might have conquered Gaul."
In the subsequent decade, Charles led the Frankish army against the eastern duchies, Bavaria and Alemannia, and the southern duchies, Aquitaine and Provence. He dealt with the ongoing conflict with the Frisians and Saxons to his northeast with some success, but full conquest of the Saxons and their incorporation into the Frankish empire would wait for his grandson Charlemagne, primarily because Charles concentrated the bulk of his efforts against Muslim expansion.
So instead of concentrating on conquest to his east, he continued expanding Frankish authority in the west, and denying the Emirate of Córdoba a foothold in Europe beyond Al-Andalus. After his victory at Tours, Charles continued on in campaigns in 736 and 737 to drive other Muslim armies from bases in Gaul after they again attempted to expand beyond Al-Andalus.
Wars of 732–737
Between his victory of 732 and 735, Charles reorganized the kingdom of Burgundy, replacing the counts and dukes with his loyal supporters, thus strengthening his hold on power. He was forced, by the ventures of Bubo, Duke of the Frisians, to invade independent-minded Frisia again in 734. In that year, he slew the duke at the Battle of the Boarn. Charles ordered the Frisian pagan shrines destroyed, and so wholly subjugated the populace that the region was peaceful for twenty years after.
The dynamic changed in 735 because of the death of Odo the Great, who had been forced to acknowledge, albeit reservedly, the suzerainty of Charles in 719. Though Charles wished to unite the duchy directly to himself and went there to elicit the proper homage of the Aquitainians, the nobility proclaimed Odo's son, Hunald of Aquitaine, whose dukedom Charles recognised when the Umayyads invaded Provence the next year, and who equally was forced to acknowledge Charles as overlord as he had no hope of holding off the Muslims alone. 
This naval Arab invasion was headed by Abdul Rahman's son. It landed in Narbonne in 736 and moved at once to reinforce Arles and move inland. Charles temporarily put the conflict with Hunald on hold, and descended on the Provençal strongholds of the Umayyads. In 736, he retook Montfrin and Avignon, and Arles and Aix-en-Provence with the help of Liutprand, King of the Lombards. Nîmes, Agde, and Béziers, held by Islam since 725, fell to him and their fortresses were destroyed.
He crushed one Umayyad army at Arles, as that force sallied out of the city, and then took the city itself by a direct and brutal frontal attack, and burned it to the ground to prevent its use again as a stronghold for Umayyad expansion. He then moved swiftly and defeated a mighty host outside of Narbonne at the River Berre, but failed to take the city. Military historians believe he could have taken it, had he chosen to tie up all his resources to do so—but he believed his life was coming to a close, and he had much work to do to prepare for his sons to take control of the Frankish realm.
A direct frontal assault, such as took Arles, using rope ladders and rams, plus a few catapults, simply was not sufficient to take Narbonne without horrific loss of life for the Franks, troops Charles felt he could not lose. Nor could he spare years to starve the city into submission, years he needed to set up the administration of an empire his heirs would reign over. In addition, he faced strong opposition from regional lords such as the patrician Maurentius, from Marseille, who revolted against the Frankish leader. Moreover, the Aquitanian duke Hunald threatened his lines of communication with the north, so deciding him to withdraw from Septimania and destroy several strongholds (Béziers, Agde, etc.). He left Narbonne therefore, isolated and surrounded, and his son would return to conquer it for the Franks. 
Notable about these campaigns was Charles' incorporation, for the first time, of heavy cavalry with stirrups to augment his phalanx. His ability to coordinate infantry and cavalry veterans was unequaled in that era and enabled him to face superior numbers of invaders, and to decisively defeat them again and again. Some historians believe the Battle against the main Muslim force at the River Berre, near Narbonne, in particular was as important a victory for Christian Europe as Tours.  : TBD
Further, unlike his father at Tours, Rahman's son in 736–737 knew that the Franks were a real power, and that Charles personally was a force to be reckoned with. He had no intention of allowing Charles to catch him unaware and dictate the time and place of battle, as his father had. He concentrated instead on seizing a substantial portion of the coastal plains around Narbonne in 736 and heavily reinforced Arles as he advanced inland.
Abdul Rahman's son planned from there to move from city to city, fortifying as they went, and if Charles wished to stop them from making a permanent enclave for expansion of the Caliphate, he would have to come to them, in the open, where, he, unlike his father, would dictate the place of battle. All worked as he had planned, until Charles arrived, albeit more swiftly than the Moors believed he could call up his entire army. Unfortunately for Rahman's son, however, he had overestimated the time it would take Charles to develop heavy cavalry equal to that of the Muslims.
The Caliphate believed it would take a generation, but Charles managed it in five years. Prepared to face the Frankish phalanx, the Muslims were totally unprepared to face a mixed force of heavy cavalry and infantry in a phalanx. Thus, Charles again halted Muslim expansion into Europe. These defeats, plus those at the hands of Leo III of the Byzantine Empire in Anatolia, were the last great attempt at expansion by the Umayyad Caliphate before the destruction of the dynasty at the Battle of the Zab, and the rending of the Caliphate forever, especially the utter destruction of the Umayyad army at River Berre near Narbonne in 737.
In 737, at the tail end of his campaigning in Provence and Septimania, the king, Theuderic IV, died. Charles, titling himself maior domus and princeps et dux Francorum , did not appoint a new king and nobody acclaimed one. The throne lay vacant until Charles' death. As the historian Charles Oman says "he cared not for name or style so long as the real power was in his hands." 
Gibbon has said Charles was "content with the titles of Mayor or Duke of the Franks, but he deserved to become the father of a line of kings," which he did. Gibbon also says of him, "in the public danger, he was summoned by the voice of his country." 
The interregnum, the final four years of Charles' life, was more peaceful than most of it had been and much of his time was now spent on administrative and organisational plans to create a more efficient state. Though, in 738, he compelled the Saxons of Westphalia to do him homage and pay tribute, and in 739 checked an uprising in Provence, the rebels being under the leadership of Maurontus. Charles set about integrating the outlying realms of his empire into the Frankish church.
He erected four dioceses in Bavaria ( Salzburg, Regensburg, Freising, and Passau) and gave them Boniface as archbishop and metropolitan over all Germany east of the Rhine, with his seat at Mainz. Boniface had been under his protection from 723 on; indeed the saint himself explained to his old friend, Daniel of Winchester, that without it he could neither administer his church, defend his clergy, nor prevent idolatry. It was Boniface who had defended Charles most stoutly for his deeds in seizing ecclesiastical lands to pay his army in the days leading to Tours, as one doing what he must to defend Christianity.
In 739, Pope Gregory III begged Charles for his aid against Liutprand, but Charles was loath to fight his onetime ally and ignored the Papal plea. Nonetheless, the Papal applications for Frankish protection showed how far Charles had come from the days he was tottering on excommunication, and set the stage for his son and grandson to rearrange Italian political boundaries.
Death and transition in rule
His territories had been divided among his adult sons a year earlier: to Carloman he gave Austrasia, Alemannia, and Thuringia, and to Pippin the Younger Neustria, Burgundy, Provence, and Metz and Trier in the "Mosel duchy"; Grifo was given several lands throughout the kingdom, but at a later date, just before Charles died.  : 50
Gibbon called him "the hero of the age" and declared "Christendom ... delivered ... by the genius and good fortune of one man, Charles Martel."
At the beginning of Charles Martel's career, he had many internal opponents and felt the need to appoint his own kingly claimant, Clotaire IV. By his end, however, the dynamics of rulership in Francia had changed, no hallowed Meroving was needed, neither for defence nor legitimacy: Charles divided his realm between his sons without opposition (though he ignored his young son Bernard). In between, he strengthened the Frankish state by consistently defeating, through superior generalship, the host of hostile foreign nations which beset it on all sides, including the non-Christian Saxons, whom his grandson Charlemagne would fully subdue, and Moors, whom he halted on a path of continental domination.
Though he never cared about titles, his son Pippin (Fr.: Pepin) did, and finally asked the Pope "who should be King, he who has the title, or he who has the power?" The Pope, highly dependent on Frankish armies for his independence from Lombard and Byzantine power (the Byzantine Emperor still considered himself to be the only legitimate " Roman Emperor ", and thus, ruler of all of the provinces of the ancient empire, whether recognised or not), declared for "he who had the power".
Decades later, in 800, Pippin's son Charlemagne was crowned emperor by the Pope, further extending the principle by delegitimising the nominal authority of the Byzantine Emperor in the Italian peninsula (which had, by then, shrunk to encompass little more than Apulia and Calabria at best) and ancient Roman Gaul, including the Iberian outposts Charlemagne had established in the Marca Hispanica across the Pyrenees, what today forms Catalonia. In short, though the Byzantine Emperor claimed authority over all the old Roman Empire, as the legitimate "Roman" Emperor, it was simply not reality.
The bulk of the Western Roman Empire had come under Carolingian rule, the Byzantine Emperor having had almost no authority in the West since the sixth century, though Charlemagne, a consummate politician, preferred to avoid an open breach with Constantinople. Though the sardonic Voltaire ridiculed its nomenclature, saying that the Holy Roman Empire was "neither Holy, nor Roman, nor an Empire," it constituted an enormous political power for a time, especially under the Saxon, the Salian dynasties, the House of Hapsburg, and, to a lesser extent, the Hohenstaufen. It lasted until 1806. Though his grandson became its first emperor, the "empire" such as it was, was largely born during the reign of Charles Martel.
Charles was a brilliant strategic general, who also was a tactical commander par excellence , able in the heat of battle to adapt his plans to his foe's forces and movement — and amazingly, to defeat them repeatedly, especially when, as at Tours, they were far superior in men and weaponry, and at Berre and Narbonne, when they were superior in numbers of fighting men. Charles had the last quality which defines genuine greatness in a military commander: he foresaw the dangers of his foes, and prepared for them with care; he used ground, time, place, and fierce loyalty of his troops to offset his foe's superior weaponry and tactics; third, he adapted, again and again, to the enemy on the battlefield, shifting to compensate for the unforeseen and unforeseeable.
Gibbon, whose tribute to Charles has been noted, was not alone among the great mid era historians in fervently praising Charles; Thomas Arnold ranks the victory of Charles Martel even higher than the victory of Arminius in the Battle of the Teutoburg Forest 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.— History of the later Roman Commonwealth, vol ii. p. 317.
German historians are especially ardent in their praise of Charles and in their belief that he saved Europe and Christianity from then all-conquering Islam, praising him also for driving back the ferocious Saxon barbarians on his borders. Schlegel speaks of this "mighty victory" in terms of fervent gratitude, 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", and Ranke points out,
as 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-defence calls forth, and finally extended them into new regions.
In 1922 and 1923, Belgian historian Henri Pirenne published a series of papers, known collectively as the "Pirenne Thesis", which remain influential to this day. Pirenne held that the Roman Empire continued, in the Frankish realms, up until the time of the Arab conquests in the 7th century. These conquests disrupted Mediterranean trade routes leading to a decline in the European economy. Such continued disruption would have meant complete disaster except for Charles Martel's halting of Islamic expansion into Europe from 732 on. What he managed to preserve led to the Carolingian Renaissance, named after him.
Professor Santosuosso perhaps sums up Charles best when he talks about his coming to the rescue of his Christian allies in Provence, and driving the Muslims back into the Iberian Peninsula forever in the mid and late 730s:
After assembling forces at Saragossa the Muslims entered French territory in 735, crossed the River Rhone and captured and looted Arles. From there they struck into the heart of Provence, ending with the capture of Avignon, despite strong resistance. Islamic forces remained in French territory for about four years, carrying raids to Lyon, Burgundy, and Piedmont. Again Charles Martel came to the rescue, reconquering most of the lost territories in two campaigns in 736 and 739, except for the city of Narbonne, which finally fell in 759. The second (Muslim) expedition was probably more dangerous than the first to Poitiers. Yet its failure (at Charles' hands) put an end to any serious Muslim expedition across the Pyrenees (forever). 
Skilled as an administrator and ruler, Charles organized what would become the medieval European government: a system of fiefdoms, loyal to barons, counts, dukes and ultimately the King, or in his case, simply maior domus and princeps et dux Francorum. (" Mayor of the Palace, Duke of the Franks ") His close coordination of church with state began the medieval pattern for such government. He created what would become the first western standing army since the fall of Rome by his maintaining a core of loyal veterans around which he organized the normal feudal levies. In essence, he changed Europe from a horde of barbarians fighting with one another, to an organized state.
Beginning of the Reconquista
Although it took another two decades for the Franks to drive all the Arab garrisons out of Septimania and across the Pyrenees, Charles Martel's halt of the invasion of French soil turned the tide of Islamic advances, and the unification of the Frankish kingdoms under Charles, his son Pippin the Younger, and his grandson Charlemagne created a western power which prevented the Emirate of Córdoba from expanding over the Pyrenees. Charles, who in 732 was on the verge of excommunication, instead was recognised by the Church as its paramount defender. Pope Gregory II wrote to him more than once, asking his protection and aid. 
Charles' son Pippin the Younger (Pepin II, The Short) kept his father's promise and returned and took Narbonne by siege in 759. His grandson, Charlemagne, actually established the Marca Hispanica across the Pyrenees in part of what today is Catalonia, reconquering Girona in 785 and Barcelona in 801. Carolingians called this region of modern-day Spain "The Moorish Marches", and saw it as more than a simple check on the Muslims in Hispania. It formed a permanent buffer zone against Islam and became the basis, along with the efforts of Pelayo (Latin: Pelagius) and his descendants, for the Reconquista.
Victor Davis Hanson argues that Charles Martel launched "the thousand year struggle" between European heavy infantry and Muslim cavalry. : 141–166 Of course, Charles is also the father of heavy cavalry in Europe, as he integrated heavy armoured cavalry into his forces. This creation of a real army would continue all through his reign, and that of his son, Pepin the Short, until his Grandson, Charlemagne, would possess the world's largest and finest army since the peak of Rome. Equally, the Muslims used infantry—indeed, at the Battle of Toulouse most of their forces were light infantry. It was not till Abdul Rahman Al Ghafiqi brought a huge force of Arab and Berber cavalry with him when he assumed the emirate of Al-Andulus that the Muslim forces became primarily cavalry.
Charles' army was the first standing permanent army since the fall of Rome in 476. At its core was a body of tough, seasoned heavy infantry who displayed exceptional resolution at Tours. The Frankish infantry wore as much as 70 pounds of armour, including their heavy wooden shields with an iron boss. Standing close together, and well disciplined, they were unbreakable at Tours. : 154 Charles had taken the money and property he had seized from the church and paid local nobles to supply trained ready infantry year round.
This was the core of veterans who served with him on a permanent basis, and as Hanson says, "provided a steady supply of dependable troops year around." While other Germanic cultures, such as the Visigoths or Vandals, had a proud martial tradition, and the Franks themselves had an annual muster of military aged men, such tribes were only able to field armies around planting and harvest. It was Charles' creation of a system whereby he could call on troops year round that gave the Carolingians the first standing and permanent army since Rome's fall in the west.
Charles Martel's most important military achievement was the victory at Tours. Creasy argues that the Charles victory "preserved the relics of ancient and the gems of modern civilizations." Gibbon called those eight days in 732, the week leading up to Tours, and the battle itself, "the events that rescued our ancestors of Britain, and our neighbours of Gaul [France], from the civil and religious yoke of the Koran."
Charles analysed what would be necessary for him to withstand a larger force and superior technology (the Muslim horsemen had adopted the armour and accoutrements of heavy cavalry from the Sassanid warrior class, which made the armored mounted knight possible). Not daring to send his few horsemen against the Islamic cavalry, he had his army fight in a formation used by the ancient Greeks to withstand superior numbers and weapons by discipline, courage, and a willingness to die for their cause: a phalanx. He had trained a core of his men year round, using mostly Church funds, and some had been with him since his earliest days after his father's death. It was this hard core of disciplined veterans that won the day for him at Tours.
Hanson emphasizes that Charles' greatest accomplishment as a general may have been his ability to keep his troops under control. Iron discipline saved his infantry from the fate of so many infantrymen—such as the Saxons at Hastings—who broke formation and were slaughtered piecemeal. After using this infantry force by itself at Tours, he studied the foe's forces and further adapted to them, initially using stirrups and saddles recovered from the foe's dead horses, and armour from the dead horsemen.
The defeats Charles inflicted on the Muslims were vital in that the split in the Islamic world left the Caliphate unable to mount an all-out attack on Europe via its Iberian stronghold after 750. His ability to meet this challenge, until the fragmentation of authority within the Muslims, is considered by most historians to be of macrohistorical importance, and is why Dante writes of him in Heaven as one of the "Defenders of the Faith."
H. G. Wells says of Charles Martel's decisive defeat of the Muslims in his "Short History of the World:
The Muslim 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 Poitiers (732) at his hands. This Charles Martel was practically overlord of Europe north of the Alps from the Pyrenees to Hungary." 
However, when the Muslim first crossed the Pyrenees, Aquitaine was actually an independent realm under duke Odo's leadership and the Gothic Septimania remained out of Frankish rule. Odo, who was Charles's southern rival, had struck a peace treaty after the Frankish civil wars in Neustria and Austrasia, and garnered much popularity and the Pope's favour for his victory on the 721 Battle of Toulouse against the Moors. On the eve of the Muslim expedition north (731), Charles Martel crossed the Loire and captured the Aquitanian city of Bourges, while Odo re-captured it briefly afterwards.
John H. 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 Moslems, should be the ruling power in Europe. Charles Martel is especially celebrated as the hero of this battle.
Just as his grandson, Charlemagne, would become famous for his swift and unexpected movements in his campaigns, Charles was renowned for never doing what his enemies forecast he would do, and for moving far faster than his opponents believed he could. It is notable that the Northmen did not begin their European raids until after the death of Charles' grandson, Charlemagne. They had the naval capacity to begin those raids at least three generations earlier, and constructed defenses against counterattacks by land, but chose not to challenge Charles, his son Pippin, or his grandson, Charlemagne.
- It (the Carolingian line) 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."
Gibbon perhaps summarized Charles Martel's legacy most eloquently: "in a laborious administration of 24 years he had restored and supported the dignity of the throne... by the activity of a warrior who in the same campaign could display his banner on the Elbe, the Rhone, and shores of the ocean."
Family and children
Most of the children married, and had issue. Hiltrud married Odilo I (a Duke of Bavaria). Landrade had been believed to have married a Sigrand (Count of Hesbania) but Sigrand's wife is more likely the sister of Rotrude. Auda married Thierry IV (a Count of Autun and Toulouse). Charles also married a second time, to Swanhild, and they had a child, Grifo.  : 50