Sweyn Forkbeard takes control of the Danelaw and is proclaimed king of England.

Sweyn Forkbeard was King of Denmark from 986, King of England for five weeks from December 1013, and King of Norway from 999/1000, all until his death in 1014. He was the father of King Harald II of Denmark, King Cnut the Great, and Queen Estrid Svendsdatter.

The Danelaw was the part of England between the late ninth century and the Norman Conquest under Anglo-Saxon rule in which Danish laws applied. The Danelaw originated in the conquest and occupation of large parts of eastern and northern England by Danish Vikings in the late ninth century. The term applies to the areas in which English kings allowed the Danes to keep their own laws following the early tenth-century Anglo-Saxon conquest of Danish ruled eastern and northern England in return for the Danish settlers' loyalty to the English crown. "Danelaw" is first recorded in the early 11th century as Dena lage.

The Kingdom of England was a sovereign state on the island of Great Britain from the 10th century, when it was unified from various Anglo-Saxon kingdoms, until 1 May 1707, when it united with Scotland to form the Kingdom of Great Britain, which would later become the United Kingdom. The Kingdom of England was among the most powerful states in Europe during the medieval and early modern periods.