Battles & Wars › Medieval wars
Viking raids and conquests
793–1066· War· Europe
Well documentedSolid records, physical evidence or scientific consensus.
For nearly three centuries Scandinavian seafarers raided, traded and settled from North America to the Caspian Sea.
See it on the Battles & Wars map →What happened
The sack of the Lindisfarne monastery in England in 793 is the traditional start. Shallow-draft longships let Vikings strike coasts and row far up rivers. Raiding grew into conquest: a Danish army seized much of England after 865, and the Frankish king granted Normandy to the chief Rollo in 911. Scandinavians also founded Dublin, helped found the state of Kievan Rus, settled Iceland and Greenland, and reached Newfoundland around 1000.
Why it matters
Vikings reshaped northern Europe, helping create England, Normandy and early Russia, and pushed local rulers to build fortifications and organized defenses.
How we know
Monastic records like the Anglo-Saxon Chronicle, Icelandic sagas written down later, rune stones, ship burials such as Oseberg, and excavated sites like L'Anse aux Meadows in Newfoundland.
Still debated
Why raiding began around 790 is debated: population pressure, better ships and sails, wealth from trade, or power struggles at home.
Inside this (2)
Connections (4)
▸Battle of Hastings is often taken to close Viking raids and conquestsMostly agreed
The connection
The year 1066 is the usual end date of the Viking Age. Less than three weeks before Hastings, Harold beat the Norwegian king Harald Hardrada at Stamford Bridge, the last great Scandinavian invasion of England. William's Normans were themselves descendants of Viking settlers in Normandy, so Hastings closed the era with a Viking-descended conquest.
When and how
Stamford Bridge near York, September 25, 1066; Hastings, Sussex, October 14, 1066.
How sure are we?
The Anglo-Saxon Chronicle records both battles; Norman chronicles trace the dukes' descent from Rollo's Scandinavian settlers.
Debates and open questions
End dates are conventions: Danish kings still attacked England in 1069–1075, and Norse rule in the Scottish islands lasted centuries longer.
▸Viking raids and conquests pushed Europe toward Castles and siege warfareMostly agreed
The connection
Viking raiders struck fast and left before armies could gather. Rulers responded with fixed defenses: Alfred the Great's network of fortified towns, or burhs, in England; fortified bridges on Frankish rivers; and local strongholds. This helped prepare the shift to lord-held private castles, which spread widely in France after about 950.
When and how
England and the Frankish lands, 860s–900s; Alfred the Great's burhs and Charles the Bald's fortified river bridges.
How sure are we?
The Burghal Hidage, a document listing Alfred's burhs, Frankish royal orders for fortified bridges, and excavated town defenses.
Debates and open questions
How much the castle boom came from Viking pressure versus the breakdown of royal power in France is debated; probably both.
▸Viking longship carried raiders across the seas in the Viking raids and conquestsWell documented
The connection
From the attack on Lindisfarne in 793, longships let Norse raiders appear without warning on coasts and rivers across Europe. They rowed up the Seine to attack Paris in 845 and 885–886, carried settlers to England, Ireland and Normandy, and sailed down Russian rivers toward the markets of Constantinople and the Islamic world.
When and how
The North Atlantic, North Sea and the rivers of Europe and Russia, 793–1066.
How we know
Annals from England, France and Ireland record raids from the sea, and ship burials and wrecks show the vessels themselves.
Debates and open questions
Why the raids began around 790, whether land shortage, trade, politics or new sailing technology, is debated.
▸Greek fire burned Rus' raiding ships (941) in the Viking raids and conquestsWell documented
The connection
The Rus', Scandinavian-led warriors and traders based in Kyiv, attacked the Byzantine coast near Constantinople in 941 under Prince Igor. A makeshift Byzantine squadron of old ships fitted with Greek fire tubes met the fleet and burned much of it. Survivors said the Greeks had lightning from heaven; Igor later signed a treaty with Byzantium.
When and how
The Bosporus and Black Sea coast near Constantinople, June 941; Prince Igor of Kyiv against the Byzantine commander Theophanes.
How we know
Byzantine chronicles, the Rus' Primary Chronicle and the Italian envoy Liudprand of Cremona all describe the fire attack.
Debates and open questions
Medieval figures for the Rus' fleet range from 1,000 to 10,000 ships; the higher figure is surely exaggerated, and the raid's real size is unknown.