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Map of the Frankish Empire from 481 to 814
|Commanders and leaders|
Chamberlain Adalgisile †,
Constable Geilo †,
Count Palatine Worad †,
Count Theodoric †
The Saxon Wars were the campaigns and insurrections of the more than thirty years from 772, when Charlemagne first entered Saxony with the intent to conquer, to 804, when the last rebellion of disaffected tribesmen was crushed. In all, eighteen battles were fought in what is now northwestern Germany. They resulted in the incorporation of Saxony into the Frankish realm and their forcible conversion from Germanic paganism to Catholicism.
Despite repeated setbacks, the Saxons resisted steadfastly, returning to raid Charlemagne's domains as soon as he turned his attention elsewhere. Their main leader, Widukind, was a resilient and resourceful opponent and accepted a peace offering from Charlemagne in a perilous situation, not losing his face and preventing Charlemagne from continuing a bothersome war. This agreement saved the Saxons' leaders' exceptional rights in their homeland. Widukind was baptized in 785 and buried in the only Germanic church without a spire.
The Saxons were divided into four subgroups in four regions. Nearest to the ancient Frankish kingdom of Austrasia was Westphalia, and farthest away was Eastphalia. In between these two kingdoms was that of Engria (or Engern) and north of these three, at the base of the Jutland peninsula, was Nordalbingia.
In mid-January 772, the sacking and burning of the church of Deventer by a Saxon expedition was the Casus belli for the first war waged by Charlemagne to the Saxons. It began with a Frankish invasion of Saxon territory and the subjugation of the Engrians and destruction of their sacred symbol Irminsul near Paderborn in 772 or 773 at Eresburg. Irminsul may have been a hollow tree trunk, presumably representing the pillar supporting the skies—similar to the Nordic tree Yggdrasil and apparently a common belief among the Germanic peoples. Charlemagne's campaign led all the way to the Weser River and destroyed several major Saxon strongholds. After negotiating with some Saxon nobles and obtaining hostages, Charlemagne turned his attention to his war against the Lombards in northern Italy; but Saxon free peasants, led by Widukind, continued to resist and raided Frankish lands in the Rhine region. Armed confrontations continued unabated for years.
Charlemagne's second campaign came in the year 775. Then he marched through Westphalia, conquering the fort of Sigiburg, and crossed Engria, where he defeated the Saxons again. Finally, in Eastphalia, he defeated them, and their leader Hessi converted to Christianity. He returned through Westphalia, leaving encampments at Sigiburg and Eresburg. All of Saxony, except for Nordalbingia was under his control, but the recalcitrant Saxons would not submit for long.
After warring in Italy, he returned very rapidly to Saxony (making it to Lippe before the Saxons knew he left Italy) for the third time in 776, when a rebellion destroyed his fortress at Eresburg. The Saxons were once again brought to heel, though Widukind fled to the Danes. Charlemagne built a new camp at Karlstadt. In 777, he called a national diet at Paderborn to integrate Saxony fully into the Frankish kingdom. Many Saxons were baptised.
The chief purpose of the diet was to bring Saxony closer to Christianity. Missionaries, mainly Anglo-Saxons from England, were recruited to carry out this task. Charlemagne issued a number of decrees designed to break Saxon resistance and to inflict capital punishment on anyone observing heathen practices or disrespecting the king's peace. His severe and uncompromising position, which earned him the title "butcher of Saxons", caused his close adviser Alcuin of York, later abbot of Marmoutier Abbey, Tours at Tours, to urge leniency, as God's word should be spread not by the sword but by persuasion; but the wars continued.
In summer 779, Charlemagne again went into Saxony and conquered Eastphalia, Engria, and Westphalia. At a diet near Lippspringe, he divided the land into missionary districts and Frankish countships. He himself assisted in several mass baptisms (780). He then returned to Italy, and there was no Saxon revolt. From 780 to 782, the land had peace.
Charlemagne returned in 782 to Saxony and instituted a code of law and appointed counts, both Saxon and Frank. The laws were severe on religious issues, namely the native paganism of the Saxons. This stirred a renewal of the old conflict. That year, in autumn, Widukind returned and led a revolt that resulted in many assaults on the church. The Saxons invaded the area of the Chatti, a Germanic tribe already converted by Saint Boniface and firmly in Charlemagne's empire. Widukind annihilated a Frankish army at the Süntel while Charles was campaigning against the Sorbs. It was in response to this setback that Charlemagne, at the Blood court of Verden, ordered the beheading of 4,500 Saxons who had been caught practising paganism after converting to Christianity, while Widukind escaped to Denmark again. Upon this Blutgericht, some historians have stated the massacre did not happen, or that it was actually a battle, but according to Alessandro Barbero, none of these claims are credible. The action led to two straight years of constant warfare (783-785), with Charlemagne wintering in central Saxony, at Minden. Gradually, the Franks gained the upper hand. The turning point came in 785, when Widukind had himself baptized and swore fealty to Charlemagne. It was with the conclusion of this war that Charlemagne could have claimed to have conquered Saxony, and the land had peace for the next seven years, though revolts continued sporadically until 804.
In 792, the Westphalians rose up against their masters in response to forcible recruitment for wars against the Avars. The Eastphalians and Nordalbingians joined them in 793, but the insurrection did not catch on as previous ones and was completely put down by 794.
An Engrian rebellion followed closely in 796, but Charlemagne's personal presence and the presence of loyal Christian Saxons and Slavs immediately crushed it. The last insurrection of the Engrian people occurred in 804, more than thirty years after Charlemagne's first campaign against them. This time, the most unruly tribe of them all, the Nordalbingians, found themselves effectively disempowered to rebel. Charlemagne deported 10,000 of them to Neustria and gave their now vacant lands to the loyal king of the Abotrites. It is constructive now to quote Einhard, Charlemagne's biographer, on the closing of such a grand conflict:
The war that had lasted so many years was at length ended by their acceding to the terms offered by the King; which were renunciation of their national religious customs and the worship of devils, acceptance of the sacraments of the Christian faith and religion, and union with the Franks to form one people.
Towards the end of the wars, Charlemagne had begun to place more emphasis on reconciliation. In 797, he eased the special laws, and in 802, Saxon common law was codified as the Lex Saxonum. This was accompanied by the establishment of ecclesiastic structures (including bishoprics in Paderborn, Münster, Bremen, Minden, Verden and Osnabrück) that secured the conversion of the Saxon people. The last Saxon uprising was the Stellinga, which occurred between 841 and 845.
Religious nature of the war
Alluding to the Saxons, the contemporary poet of the Paderborn Epic praises terror as a means of conversion: "What the contrary mind and perverse soul refuse to do with persuasion, / Let them leap to accomplish when compelled by fear."
One of Charlemagne's famed capitularies outlines part of the religious intent of his interactions with the Saxons. In 785 AD he issues the Capitulatio de partibus Saxoniae which asserted that "If any one of the race of the Saxons hereafter concealed among them shall have wished to hide himself unbaptized, and shall have scorned to come to baptism and shall have wished to remain a pagan, let him be punished by death." 
- Jennifer R. Davis (2015), Charlemagne's Practice of Empire (Cambridge: Cambridge University Press), p. 179. The Royal Frankish Annals record battles in the years 772–80, 782–85, 793–99, 802 and 804.
- Barbero, Alessandro (2004). Charlemagne: father of a continent. University of California Press. p. 46. ISBN 978-0-520-23943-2.
- Mary Garrison, "The Emergence of Carolingian Latin Literature and the Court of Charlemagne (780–814)," Carolingian Culture: Emulation and Innovation, ed. Rosamond McKitterick (Cambridge, 1994), 133.: Quod mens laeva vetat suadendo animusque sinister, / Hoc saltim cupiant implere timore coacti.
- Munro, Dana Carleton (Trans.) (2004). Selections from the Laws of Charles the Great. ISBN 978-1-4179-6511-3
- Reuter, Timothy. Germany in the Early Middle Ages 800–1056. New York: Longman, 1991.
- Oman, Charles. The Dark Ages 476–918. London, 1914.
- Einhard, translated by Samuel Epes Turner. The Life of Charlemagne. New York, 1880.
- McGrath, Freddie. The Longevity of the Saxon Wars. at Leeds University
- König, Daniel G.. Charlemagne's Jihad Revisited. Debating the Islamic Contribution to an Epochal Change in the History of Christianization, in: Medieval Worlds 3 (2016), p. 3-40.