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EventsEdit

March 25 – Battle of Nesjar (off the coast of Norway): Olaf Haraldsson is victorious over former co-regent Sweyn Haakonsson, confirming his status as king of Norway.
April 23 – Æthelred the Unready, king of England, dies after a 38-year reign. He is succeeded by his son Edmund II "Ironside".Template:Sfn
Summer – Battle of Brentford (near London): Edmund Ironside defeats the Danes under King Cnut.Template:Sfn
July 6 – Battle of Pontlevoy: French forces of Fulk III and Herbert I defeat Odo II which determines the balance of power in the Loire Valley.Template:Sfn
October 18 – Battle of Assandun: Cnut defeats Edmund Ironside, leaving the latter as king of Wessex.Template:Sfn
November 30 – Edmund II dies and Cnut takes control of the whole of the Kingdom of England.Template:Sfn
The Pisan and the Genoese republics launch a naval offensive against the Muslim strongholds of Sardinia, in particular Porto Torres, and defeat the fleet of the taifa king of Dénia, Mujāhid al-ʿĀmirī.Template:Sfn
Melus of Bari makes a second attempt against Byzantine-held Southern Italy. To support his cause, he hires Norman mercenaries, unwittingly triggering the rise of Norman rule over southern Italy.Template:Sfn
Georgius Tzul, ruler of Khazaria, is captured by a combined Byzantine Empire–Kievan Rus' force, which effectively ends Khazaria's existence.

January 7 – Fath al-Qal'i, governor of the Citadel of Aleppo, revolts against Emir Mansur ibn Lu'lu', forcing him to flee. Fath accepts an agreement with Salih ibn Mirdas and takes control of Aleppo.

March 10 – Emperor Sanjō of Japan abdicates the throne after a 5-year reign. He is succeeded by his 7-year-old cousin Go-Ichijō as the 68th emperor of Japan. Fujiwara no Michinaga is appointed regent.
Japanese poet Koshikibu no Naishi (lady-in-waiting to Dowager Empress Shōshi) and her husband Fujiwara no Kiminari (son of Michinaga) have a son, but the couple is not accepted because of the social gap between them.<ref>Template:Citation.</ref>

April 23 – Æthelred the Unready, king of England
May 22 – Jovan Vladimir, Serbian prince (b. 990)
September 6 – Fujiwara no Bokushi, great-grandmother of the Emperor of Japan
October 18
- Ælfric of Hampshire, English nobleman
- Eadnoth the Younger, bishop of Dorchester in England
- Ulfcytel Snillingr, English nobleman
November 30 – Edmund II "Ironside", king of England
Badis ibn Mansur, Muslim emir of the Zirid dynasty
Henry II "the Good", count of Stade (b. 946)
Liu Chenggui, official of Song dynasty China (b. 951)
Simeon of Mantua, Armenian Benedictine monk
Sulayman ibn al-Hakam, caliph of Córdoba
Uhtred the Bold, English nobleman
Wulfgar of Abingdon, English abbot