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 I of England 1254, English fears of a Castilian invasion of the English province of Gascony induced Edward's father to arrange a politically expedient marriage between his fifteen-year-old son and thirteen-year-old Eleanor, the half-sister of King Alfonso X of Castile. Eleanor and Edward were married on 1 November 1254 in the Abbey of Santa María la Real de Las Huelgas in Castile. As part of the marriage agreement, the young prince received grants of land worth 15,000 marks a year. Although the endowments King Henry made were sizeable, they offered Edward little independence. He had already received Gascony as early as 1249, but