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
Edward IV of England back his kingdom. Edward returned to England with a relatively small force and avoided capture. The city of York opened its gates to him only after he promised that he had just come to reclaim his dukedom, as Henry Bolingbroke had done seventy years earlier. The first to join him were Sir James Harrington and William Parr, who brought 600 men-at-arms to Edward at Doncaster. As he marched southwards he began to gather support, including Clarence (who had realised that his fortunes would be better off as brother to a king than under Henry VI). Edward entered London unopposed, where