Ireland’s High King Brian Boru divorces Queen Gormflaith some time during the 1010s, and she begins to engineer opposition to the High King.

Relations between Brian and Leinster have become so strained that revolt breaks out among the Leinstermen around 1012.

Eric Haakonsson leaves Norway in 1014 or 1015 and joins Cnut, later known as Canute the Great, for his campaign in England.

The Scandinavian invasion fleet lands at Sandwich in midsummer 1015 where it meets little resistance.

Cnut's forces move into Wessex and plunder in Dorset, Wiltshire and Somerset.

Alderman Eadric Streona assembles an English force of forty ships and submits to Cnut.

The Scandinavian army moves over the Thames in early 1016 into Mercia, plundering as it goes.

Prince Edmund attempts to muster an army to resist the invasion but his efforts are not successful.

Cnut's forces continue unhindered into Northumbria where Uhtred the Bold, earl of Northumbria, is murdered.

The great north English earldom is given by Cnut to Eric after he wins control of the North.

The invading army turns south again towards London.

King Æthelred the Unready dies before they arrive, and Prince Edmund is chosen king.

The Scandinavian forces besiege London.

After several battles, Cnut and Edmund reach an agreement to divide the kingdom, but Edmund dies a few months later.

Cnut, as the undisputed king of all England in 1017, divides the kingdom into four parts.

Wessex he keeps for himself, East Anglia he gives to Thorkell, Northumbria to Eric and Mercia to Eadric.

Cnut has Eadric executed as a traitor later in the same year.