Wessex Danes invaded and unified England.

During the reign of egbert (802-829), Wessex's national strength was revived again, and he became the patriarch of all England. However, his successor was forced to give up a large part of hegemony in order to concentrate on resisting the Danish invasion.

By the time of Alfred the Great's reign, the concepts of Wessex and Britain were gradually equated. In the 10 century, Edward, Ethelstan (who became the first "King of England" in 927), Edmund I and Edred became the kings of Wessex, and Wessex gradually established a unified rule over the whole of England, including the French-inhabited areas in Denmark.