Viking Raids and Responses

Why Viking raids were difficult to resist

From the late eighth century, Viking attacks brought warfare to Anglo-Saxon England. England was divided into kingdoms, including Northumbria, Mercia, East Anglia and Wessex, rather than being governed by one king. Rivalry and political division could make coordinated resistance difficult.

A raid was an attack to seize wealth, captives or supplies. Viking raiders sought portable valuables such as gold and silver, and people who could be enslaved. Monasteries were attractive targets because they possessed wealth but often had weak defences.

Longships helped raiders move quickly along coasts and up rivers. Their shallow draught—the depth of the ship below the water—allowed access to relatively shallow waterways. This meant that inland settlements, not just places beside the sea, could face attack. Speed and surprise made it difficult for defenders to gather forces before the raiders struck.

The impact on people and religious life

The attack on Lindisfarne in 793 illustrates the violence and shock of early raids. The Anglo-Saxon Chronicle described plundering and murder at the monastery. Such attacks caused deaths and the loss of valuable possessions; the taking of captives also threatened people with enslavement.

For Christian communities, an attack on a monastery was more than a loss of wealth. It was violence against a sacred place. Christian writers called the Vikings ‘heathens’, meaning people who did not follow Christianity. The Chronicle connected the Lindisfarne attack with frightening omens, while the scholar Alcuin warned King Æthelred of Northumbria that wrongdoing could lead rulers and peoples to lose their kingdoms and country.

These accounts reveal fear and religious interpretations of disaster. They should not be treated as proof that divine punishment caused the raids. The raiders’ pursuit of wealth and their ability to exploit poorly defended targets offer a different explanation.

From raiding to conquest and settlement

Viking warfare changed over time. Small attacks could cause destruction without replacing a kingdom’s rulers. Larger armies could remain in England, campaign repeatedly and take political control.

The arrival of the Great Heathen Army in 865 marked an important shift towards conquest. It captured York in 866, giving the Vikings an important centre of power in Northumbria. In 869, King Edmund of East Anglia was defeated and killed. Warfare therefore threatened not only individual communities but also kings and the survival of their kingdoms.

Conquest could lead to settlement. Some Viking warriors established farms rather than continuing to raid. Northern and eastern England developed into the Danelaw, where Danish law and customs became established. Leicester, Nottingham, Derby, Stamford and Lincoln became known as the Five Boroughs, important fortified towns under Viking control.

The consequences were therefore mixed and changed over time. Initial attacks brought violence and dispossession, but settlement also produced farming, coexistence and cultural exchange. Norse words entered English as communities lived alongside one another. Vikings were not simply raiders throughout their presence in England: some became settlers and rulers.

Buying peace: an immediate but uncertain response

Anglo-Saxon rulers sometimes negotiated or paid Viking forces to leave. Payments commonly described as Danegeld offered an alternative to risking defeat in battle. Alfred of Wessex also used payment during his struggle against Viking armies.

A payment could secure withdrawal and give a kingdom time to recover. However, it transferred wealth to the attackers and did not guarantee lasting safety. If threatening a kingdom produced a profitable payment, Viking leaders had a reason to return or make further demands. Buying peace could therefore relieve an immediate danger while leaving the underlying threat unresolved.

Alfred’s military and diplomatic responses

Alfred, king of Wessex from 871 to 899, combined fighting, negotiation and defensive reform. His victory over Guthrum at Edington in 878 helped preserve Wessex as an independent Anglo-Saxon kingdom. Guthrum subsequently agreed to baptism, and peace agreements helped establish arrangements between Anglo-Saxon and Viking-controlled territories.

Alfred also strengthened the kingdom’s ability to resist future attacks. A network of burhs, or fortified towns, provided refuges for local people and secure bases for troops. A raiding force could no longer assume that it would find an undefended target and escape quickly with its plunder. Strongholds made attacks harder and supported counter-attacks.

He reorganised his military forces to respond more effectively and developed a naval force to challenge Viking ships. These measures addressed different parts of the threat: fortified towns protected places on land, while ships could contest the waterways that helped Viking forces move.

How organised defence changed people’s obligations

The fyrd was an Anglo-Saxon military force raised through obligations connected to landholding and service to lords. Before Alfred’s reforms, gathering forces from different districts took time. A fast-moving Viking army could attack and withdraw before sufficient defenders assembled.

Alfred divided his army into two rotating contingents: one served while the other remained at home, with separate men guarding the burhs. This gave greater continuity to military operations instead of requiring a fresh force to be gathered for every emergency. Men serving at home also helped protect their own districts. Mounted troops could travel more quickly in pursuit of raiders; this did not mean that they necessarily fought on horseback.

The burhs and the field army worked together. Fortifications sheltered communities and obstructed raiders, while the mobile army could pursue them or launch counter-attacks. Walls alone were not enough: towns needed defenders and maintenance.

Landholders in the districts supporting burhs had to provide men to maintain and garrison them, alongside obligations to support the fyrd. Defence therefore placed demands on land, resources and people even when their own settlement was not being attacked. Military service took men away from home, while the remaining population continued to support local life and defence.

These arrangements also changed government. The king had to coordinate service and resources across his kingdom rather than rely only on isolated local resistance. Viking pressure encouraged stronger royal organisation, even though warfare had destroyed royal authority elsewhere.

From survival to stronger English royal power

Alfred’s defensive system helped his successors and their Mercian allies recover Viking-controlled territory. Later rulers built on resistance to Viking expansion. Alfred’s grandson Æthelstan, who ruled from 924 to 939, defeated a coalition of Viking, Scottish and Strathclyde forces at Brunanburh in 937. This demonstrated the strength of English royal power against Viking and regional rivals.

Nevertheless, successful resistance did not permanently remove the threat. Effective defence depended on keeping troops, fortifications and organisation ready for renewed attacks.

Renewed attacks and Æthelred’s responses

Viking raids increased again from the 980s, during the reign of Æthelred II. He used several responses rather than relying on battle alone. In 991, he made a diplomatic agreement with the Duke of Normandy, and he later married the duke’s daughter, Emma. He also bought off Danish attacks with payments raised through taxation.

The financial burden could be enormous. In 1012, 48,000 pounds of silver was paid to Danish forces camped in London. Here, pounds refers to the weight of silver, not modern currency. Raising such a payment transferred resources from the kingdom to the invaders and imposed a heavy demand on taxpayers. Yet renewed payments did not produce lasting security: the Anglo-Saxon Chronicle complained in 1006 that the Danish army still went about as it pleased.

Æthelred also sought to strengthen naval defence. Land was assessed for obligations to provide and maintain ships and crews. Like Alfred’s fortifications, this response made defence a collective responsibility supported by resources from across the kingdom.

Fear of disloyalty could produce a very different response. In 1002, Æthelred ordered the killing of Danes in England to eliminate what he regarded as potential treachery. This was an order directed against people within his kingdom, not simply an attack on an invading army. It shows how warfare could turn suspicion towards resident communities; the order does not mean that every Dane in England was killed.

Conquest and Scandinavian kingship

Payments, diplomacy and military preparations did not prevent renewed conquest. In 1013, Swein, king of Denmark, displaced Æthelred, who fled to Normandy. Æthelred returned after Swein’s death in 1014, but died in 1016. Swein’s son Cnut became king of England in 1016 and ruled until 1035.

The political impact had moved beyond raids or regional settlement: a Scandinavian ruler now controlled the English kingdom. Under Cnut, England became part of a wider group of kingdoms that included Denmark and Norway. War had changed who ruled England and linked its monarchy to power across the North Sea.

The Norwegian invasion and English response in 1066

After Edward the Confessor died in 1066, Harold II became king of England. Harald Hardrada, king of Norway, invaded that year with the support of Harold’s exiled brother, Tostig. This was an attempt to win a kingdom, not merely a raid for portable wealth.

Local English forces under the earls Edwin and Morcar tried to stop the invasion near York, but were defeated at Fulford on 20 September 1066. Many English troops were killed, drowned or forced to flee. York then supplied Hardrada with provisions and hostages. Submission and negotiation offered the city an alternative to continued resistance; they do not necessarily show enthusiastic support for the invaders.

Harold responded by moving rapidly north from London and gathering forces. At Stamford Bridge on 25 September 1066, he surprised the Norwegian army and won a decisive victory. Hardrada and Tostig were killed, and the surviving invaders returned home. The response demonstrated the English monarchy’s ability to mobilise and defeat a major invasion.

Victory nevertheless carried a cost. Both sides suffered heavy casualties, and Harold was in northern England when William of Normandy landed in Sussex. He therefore had to move south to face another invasion with losses already suffered. How much Stamford Bridge contributed to his later defeat at Hastings remains debated: defeating one threat had not made England safe from another.

Weighing the effects of Viking warfare

Across 790–1066, Viking warfare weakened or destroyed some kingdoms, established new rulers and exposed people to death, captivity and loss of possessions. Settlement also brought farming, coexistence and cultural exchange.

Resistance could strengthen royal government through coordinated armies, fortifications and taxation, but these measures imposed obligations on society and did not guarantee permanent security. The central connection is that warfare changed both what rulers demanded from their people and what protection people needed from their rulers.

Changes in Viking warfare

• Raiding: rapid attacks for wealth, captives and supplies; longships enabled coastal and river movement.
• Conquest: Great Heathen Army, 865; York captured, 866; Edmund of East Anglia killed, 869.
• Settlement: farming, Danish law and customs in the Danelaw; cultural exchange.

Impacts on people and government

• Lindisfarne, 793: plunder, murder and religious shock.
• Death, enslavement, loss of possessions and fear; kings and kingdoms could be overthrown.
• Defence required military service, fortification maintenance and resources; payments required taxation.
• Resistance strengthened royal organisation, while conquest replaced rulers.

Alfred and his successors

• Alfred, 871–899: Edington, 878; Guthrum’s baptism; negotiation; burhs; naval defence.
• Rotating fyrd: half serving, half at home, with separate burh guards; more continuous defence.
• Burhs + mobile army: refuge and secure bases combined with pursuit and counter-attacks.
• Æthelstan: Brunanburh, 937, demonstrated stronger English royal power.

Renewed warfare and conquest

• Raids increased from the 980s under Æthelred II.
• Responses: diplomacy, naval obligations, Danegeld and the 1002 order to kill Danes in England.
• 1012: payment of 48,000 pounds of silver; heavy tax burden without lasting security.
• Swein, 1013: displaced Æthelred. Cnut, 1016–1035: ruled England within a wider Scandinavian monarchy.

The final invasion of 1066

• Fulford, 20 September: Hardrada defeated local English forces; York supplied provisions and hostages.
• Stamford Bridge, 25 September: Harold defeated Hardrada; Hardrada and Tostig killed.
• English casualties and Harold’s position in the north complicated his response to William’s landing.

Overall judgement

Immediate destruction could lead to lasting settlement or political change. Responses could protect people and strengthen government, but brought costs and offered no permanent guarantee of safety.