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
Stigand would not have a son from his marriage, and he and his advisors began to search for an heir. Edward the Atheling, the son of King Edmund Ironside (reigned 1016), had been exiled from England in 1017, after his father's death. Although Ealdred, the Bishop of Worcester, went to the Continent in search of Edward the Exile, Ian Walker, the biographer of King Harold Godwinson, feels that Stigand was behind the effort. In the end, although Edward did return to England, he died soon after his return, leaving a young son Edgar the Ætheling. King Edward, on his deathbed, left