In early 918, Æthelflæd secured the submission of Leicester without a fight, and the Danes of Northumbrian York offered her their allegiance, probably for protection against Norse (Norwegian) Vikings who had invaded Northumbria from Ireland, but she died on 12 June before she could take up the proposal. The same offer is not known to have been made to Edward, and the Norse Vikings took York in 919. According to the main West Saxon version of the Anglo-Saxon Chronicle, after Æthelflæd's death the Mercians submitted to Edward, but the Mercian version (the Mercian Register) states that in December 918 her daughter Ælfwynn "was deprived of all authority in Mercia and taken into Wessex".
In early 918, Æthelflæd achieved Leicester's submission without conflict, and the Danes of Northumbrian York pledged their allegiance to her for protection against Norse Vikings who had invaded Northumbria from Ireland. However, she died on June 12 before accepting the offer. The same proposal was not made to Edward, and the Norse Vikings captured York in 919. According to the main West Saxon version of the Anglo-Saxon Chronicle, after Æthelflæd's death, Mercians submitted to Edward; however, the Mercian Register states that in December 918 her daughter Ælfwynn lost all authority in Mercia and was taken into Wessex.