Kingdom of England unity ever since. During the reign of Æthelred the Unready (978–1016), a new wave of Danish invasions was orchestrated by Sweyn I of Denmark, culminating after a quarter-century of warfare in the Danish conquest of England in 1013. But Sweyn died on 2 February 1014, and Æthelred was restored to the throne. In 1015, Sweyn's son Cnut the Great (commonly known as Canute) launched a new invasion. The ensuing war ended with an agreement in 1016 between Canute and Æthelred's successor, Edmund Ironside, to divide England between them, but Edmund's death on 30 November of that year left England united
Edgar Ætheling Edgar. However, within months Robert left England, unhappy with William's failure to fulfil the pact between them, and Edgar went with him to Normandy. Having returned to England, Edgar went to Scotland again in 1093, on a diplomatic mission for William to negotiate with Malcolm, who was dissatisfied with the Norman failure to implement in full the terms of the 1091 treaty. This dispute led to war, and within the year Malcolm had invaded England and had been killed along with his designated heir Edward, eldest of his sons by Margaret, in the Battle of Alnwick. Malcolm's successor, his brother