Year
War
Belligerents (excluding Denmark)
Outcome
Allies
Enemies
c. 770
Harald Wartooth 's invasion of Sweden
Denmark
Sweden
Victory
Harald Wartooth subjegates a majority of Sweden
c.770
Battle of Brávellir
Denmark Wends Eastern Geats
Sweden Estonians Western Geats
Defeat
793–1066
Viking invasions of England
Norse Vikings
Kingdom of England
Victory (first phase)
Defeat (second phase)
810–811
Invasion of Frisia
Danish Kingdom
Francia
Stalemate
813
Halfdan the Mild's revolt
Danish Kingdom
Halfdan the Mild
Revolt successful
Denmark is expelled and Vestfold gains independence.
838
Battle of Hingston Down
Danish Vikings Cornwall
Anglo-Saxons
Defeat
845
Siege of Paris (845)
Norse Vikings
Francia
Viking victory
851
Battle of Aclea
Danish Vikings
Kingdom of Wessex
Defeat
853
Invasion of Courland
Danish Vikings
Curonians
Defeat
859
Viking raid on Nekor [1 ] [2 ] [3 ] (ca. 859)
Norse Vikings
Kingdom of Nekor
Viking victory
Vikings occupied Nekor for 8 days.
865–878
Great Heathen Army's invasion of England
Norse Vikings Norse–Gaels
Anglo-Saxon kingdoms :
Kingdom of Strathclyde Kingdom of Alba
Viking victory
866
Battle of Brissarthe
Danish Vikings Brittany
Francia
Viking victory
880
Battle of Thimeon
Danish Vikings
West Francia
Defeat
881
Battle of Saucourt-en-Vimeu
Danish Vikings
West Francia
Defeat
882
Siege of Asselt
Danish Vikings
East Francia
Defeat
885–886
Siege of Paris (885–886)
Danish Vikings
West Francia
Stalemate
891
Battle of Leuven (891)
Danish Kingdom
East Francia
Defeat
Death of Sigfried and Godfried
899–902
Æthelwold's Revolt
Followers of Æthelwold æthelingSupported by: Danes of Northumbria Kingdom of East Anglia
Followers of Edward the Elder:
Defeat
900s
Olof the Brashs conquest of Denmark
Danish Kingdom
Olaf the Brash
Defeat
Victory for Olaf
911
Siege of Chartres (911)
Danish Vikings
West Francia
Stalemate
939
Battle of Trans-la-Forêt
Danish Vikings
West Francia Brittany
Defeat
955–961
War between King Haakon the Good and the sons of Eirik Bloodaxe
Sons of Eric Bloodaxe Kingdom of Denmark
Norway
Defeat
974
German–Danish War of 974
Kingdom of Denmark Norwegian vassal
Holy Roman Empire
Defeat
Hedeby under German occupation from 974 to 981
mid-980s
Sweyn's revolt against Harald Bluetooth
Sweyn Forkbeard
Harald Bluetooth
Victory for Sweyn Forkbeard
986
Battle of Fýrisvellir
Kingdom of Denmark Jomsvikings
Sweden
Defeat
986
Battle of Hjörungavágr
Kingdom of Denmark Jomsvikings
Norway
Defeat
986
Norwegian-Jomsviking War
Kingdom of Denmark Jomsvikings
Norway
Defeat
Norwegian Victory
Danish fleet destroyed
992
Erik the Victorious invasion of Denmark
Danish Kingdom
Sweden
Defeat Swedish victory [4 ] [5 ]
mid-990s
Eric the Victorious invasion of the Holy Roman Empire
Danish Kingdom
Sweden
Holy Roman Empire
Stalemate Stade and Northern Germany gets pillaged and plundered by Vikings. Eric, however, fails to permanently capture land in the Holy Roman Empire.
1000
Battle of Svolder
Kingdom of Denmark Sweden Earldom of Lade
Norway
Allied Victory
1004
Battle of Thetford
Kingdom of Denmark
Norway Anglo-Saxons
Anglo-Norwegian Victory
1013
Sweyn Forkbeards invasion of England
Kingdom of Denmark
Kingdom of England
Danish victory
1015–1016
Olav II's conquest of Norway (1015–1016)
Kingdom of Sweden Kingdom of Denmark Earldom of Orkney
Kingdom of Norway
Defeat
1016
Cnut the Great's invasion of England
Kingdom of Denmark Kingdom of Norway
Kingdom of England
Dano-Norwegian victory
1028
Battle of Helgeå
Kingdom of Denmark Kingdom of England
Sweden Norway
Anglo-Danish victory
Subjegation of parts of Sweden
1028–1029
Cnut's Invasion of Norway
North Sea Empire
Norway
Anglo-Danish victory
1031
Battle of Stiklestad
The "Peasant Army".loyal to Cnut the Great .
Norway
Peasant victory
1043
Magnus the Good's conquest of Denmark
Denmark
Kingdom of Norway
Defeat
1043
Battle of Lyrskov Heath
Norway
Wends
Norwegian and Danish Loyalist victory
1043
Norwegian-Wendish War
Norway
Wends
Norwegian and Danish Loyalist victory
Destruction the Viking fort Jomsborg, possibly to destroy the Danish competitors to the throne. Plundering of the Wendish town of Jumne.
1048–1064
Invasion of Denmark
Denmark
Norway
Stalemate
Peace agreement, mutual recognition and Norwegian withdrawal.
1069–1075
Danish attacks on Norman England
Denmark Earl of Northumbria
Norman England
Stalemate
1086
Peasant rebellion in Vendsyssel
Denmark
peasants
Defeat
1093
Battle of Schmilau
Prince Henry Denmark Saxony
Obotrites
Victory
Victory for the Christian coalition
1131–1157
Danish Civil War (Civil war) [7 ]
Valdemar I of Denmark
Canute V of Denmark
Sweyn III of Denmark
Valdemar Victory
Valdemar I is made king of all of Denmark
1144–1147
Wendish Crusade
Denmark Kingdom of Poland Holy Roman Empire
Polabian Slavs West Slavs
Victory
1168 or 1169
Siege of Arkona
Denmark
Rani
Danish Victory
Rügen conquered and converted
1170
Battle of Julin Bridge
Denmark
Pomeranians
Danish Victory
entire army of Bogislaw scattered
1181
Battle of Dösjebro
Royalists
Scanian rebels
Royalist Victory
1182
Harald Skraengs uprising
Harald Skraeng Sweden
Denmark
Victory Uprising quelled
1184
Battle of Greiswald Bay [8 ]
Denmark
Pomerania Supported by: Holy Roman Empire
Danish Victory
1189–1192
Third Crusade
Angevin Empire Kingdom of France Kingdom of Jerusalem
Republic of Pisa Kingdom of Sicily Papal States Holy Roman Empire Duchy of Bohemia Armenian Kingdom of Cilicia Kingdom of Denmark Republic of Genoa
Ayyubids
Sultanate of Egypt
Emirate of Damascus
Emirate of Hamah
Emirate of Mesopotamia
Crusader Victory
1191
Danish Crusade of 1191 [9 ]
Denmark
Finnish tribes
Unknown result
1192
Invasion of Bishop Valdemar [10 ]
Denmark
Denmark Bishop Valdemar Supported by: Sweden [11 ] Norway [12 ] Hohenstaufen Holstein Ratzeburg Brandenburg
Victory
Bishop Valdemar is imprisoned
1201
Battle of Stellau
Denmark
County of Holstein
Danish Victory
1201
Danish Crusade of 1201
Denmark
Finnish tribes
Indecisive
Conquered regions handed over to Sweden[13 ]
1203–1290
Livonian Crusade
Sword-Brothers Livonian Order Denmark Sweden
Indigenous peoples
Victory
1204–1208
The Second Bagler War
Denmark Bagler Party
Birkebeiner
Peace
1210
Battle of Gestilren
Denmark House of Sverker
Sweden House of Eric
Defeat
1210
Invasion of Pomeralia
Denmark
Pomeralia
Danish Victory
1225
Battle of Mölln (1225)
Denmark
County of Schwerin
Defeat
Danish possessions in Germany rebels
1227
Danish–German war
Denmark
County of Holstein Hanseatic League
Defeat
1240–1242
Livonian campaign against Rus'
Livonian Order Denmark
Novgorod Republic
Defeat
1245
Battle of Embo
Denmark Norway
Kingdom of Scotland
Defeat
1250
Expedition against Frisia
Denmark
Frisian rebels
Defeat
1256
Halland Campaign
Denmark
Norway
Peace treaty signed
1259-1261
The Archbishop War [14 ]
Margaret
Lund Archbishopric Schleswig Rügen
Defeat
1274-1275
The war against Valdemar Birgersson
Denmark Magnus III of Sweden
Sweden
Victory
1276–1278
6000-mark war
Denmark
Sweden
Victory
1289–1295
Danish-Norwegian War
Denmark
Norway Danish outlaws
Defeat