Cnut the Great in the context of "Sweyn Forkbeard"

Edward the Confessor (c. 1003 – 5 January 1066) was King of the English from 1042 until his death in 1066. He was the last reigning monarch of the House of Wessex.

Edward was the son of Æthelred the Unready and Emma of Normandy. He succeeded Cnut the Great's son – and his own half-brother – Harthacnut. He restored the rule of the House of Wessex after the period of Danish rule since Cnut conquered England in 1016. When Edward died in 1066, he was succeeded by his brother-in-law Harold Godwinson, who was defeated and killed in the same year at the Battle of Hastings by the Normans under William the Conqueror. Edward's young great-nephew Edgar Ætheling of the House of Wessex was proclaimed king after the Battle of Hastings, but was never crowned and was peacefully deposed after about eight weeks.

The Kingdom of England was a sovereign state on the island of Great Britain from the 10th century, when it was unified from various Anglo-Saxon kingdoms, until 1 May 1707, when it united with Scotland to form the Kingdom of Great Britain, which would later become the United Kingdom. The Kingdom of England was among the most powerful states in Europe during the medieval and early modern periods.

Beginning in the year 886 Alfred the Great reoccupied London from the Danish Vikings and after this event he declared himself King of the Anglo-Saxons, until his death in 899. During the early tenth century, the various Anglo-Saxon kingdoms were united by Alfred's descendants Edward the Elder (reigned 899–924) and Æthelstan (reigned 924–939) to form the Kingdom of the English. In 927, Æthelstan conquered the last remaining Viking kingdom, York, making him the first Anglo-Saxon ruler of the whole of England. In 1016, the kingdom became part of the North Sea Empire of Cnut the Great, a personal union between England, Denmark and Norway. The Norman Conquest in 1066 led to the transfer of the English capital city and chief royal residence from the Anglo-Saxon one at Winchester to Westminster, and the City of London quickly established itself as England's largest and principal commercial centre.

The House of Wessex, also known as the House of Cerdic, the House of the West Saxons, the House of the Gewisse, the Cerdicings and the West Saxon dynasty, refers to the family, traditionally founded by Cerdic of the Gewisse, that ruled Wessex in Southern England from the early 6th century. The house became dominant in southern England after the accession of King Ecgberht in 802. Alfred the Great saved England from Viking conquest in the late ninth century and his grandson Æthelstan became first king of England in 927. The disastrous reign of Æthelred the Unready ended in Danish conquest in 1014. Æthelred and his son Edmund Ironside attempted to resist the Vikings in 1016, but after their deaths the Danish Cnut the Great and his sons ruled until 1042. The House of Wessex then briefly regained power under Æthelred's son Edward the Confessor, but lost it after the Confessor's reign, with the Norman Conquest in 1066. All monarchs of England (and subsequently Great Britain) since William II have been descended from the House of Wessex through William the Conqueror's wife Matilda of Flanders, who was a descendant of Alfred the Great through his daughter Ælfthryth. All English and later British monarchs since Henry II are descended from the English kings of the House of Wessex through Henry I's wife, Matilda of Scotland, daughter of Margaret of Wessex, a great-granddaughter of Edmund Ironside.

Emma of Normandy (referred to as Ælfgifu in royal documents; c. 984 – 6 March 1052) was a Norman-born noblewoman who became the English, Danish, and Norwegian Queen through her marriages to the Anglo-Saxon King Æthelred the Unready and the Danish King Cnut the Great. A daughter of the Norman ruler Richard the Fearless and Gunnor, she was Queen of England during her marriage to King Æthelred from 1002 to 1016, except during a brief interruption in 1013–14 when the Danish King Sweyn Forkbeard occupied the English throne. Æthelred died in 1016, and Emma married Sweyn's son Cnut. As Cnut's wife, she was Queen of England from their marriage in 1017, Queen of Denmark from 1018, and Queen of Norway from 1028 until Cnut died in 1035.

After Cnut's death, Emma continued to participate in politics during the reigns of her sons by each husband, Harthacnut and Edward the Confessor. In 1035 when her second husband Cnut died and was succeeded by their son Harthacnut, who was in Denmark at the time, Emma was designated to act as his regent until his return, which she did in rivalry with Harold Harefoot. Emma is the central figure within the Encomium Emmae Reginae, a critical source for the history of early-11th-century English politics. As Catherine Karkov notes, Emma is one of the most visually represented early medieval queens.

Harthacnut (c. 1018 – 8 June 1042) was King of Denmark from 1035, and King of England from 1040 until his death in 1042. He was the last monarch of the North Sea Empire, an empire consisting of England and Denmark, and was also the last monarch of the House of Knýtlinga.

Harthacnut was the son of King Cnut the Great, who ruled Denmark, Norway, and England, and Emma of Normandy. After Cnut's death in 1035, Harthacnut faced challenges in retaining his father's territories. Magnus I seized control of Norway, while Harthacnut succeeded as King of Denmark. In 1040, following the death of his half-brother Harold Harefoot, he became King of England. Harthacnut died suddenly in 1042 and was succeeded by Magnus in Denmark and Edward the Confessor in England. He was the last Dane to rule England.

Harold Godwinson (died 14 October 1066), also called Harold II, was the last crowned Anglo-Saxon king of England. Harold reigned from 6 January 1066 until his death at the Battle of Hastings on 14 October 1066, the decisive battle of the Norman Conquest. He was succeeded by William the Conqueror, the victor at Hastings.

Harold Godwinson was a member of the most powerful noble family in England, his father Godwin having been made earl of Wessex by King Cnut the Great. Harold, who served previously as earl of East Anglia, was appointed to his father's earldom on Godwin's death. After his brother-in-law, King Edward the Confessor, died childless on 5 January 1066, the Witenagemot convened and chose Harold to succeed him; he was probably the first English monarch to be crowned in Westminster Abbey. In late September, he defeated an invasion by rival claimant Harald Hardrada of Norway in the Battle of Stamford Bridge near York before marching his army back south to meet William at Hastings two weeks later, where he was killed in battle.

Swein Forkbeard (also Sweyn, died 3 February 1014) was King of Denmark from 986, King of England for five weeks from December 1013, and King of Norway from 999/1000, all until his death in 1014. He was the father of King Harald II of Denmark, King Cnut the Great, and Queen Estrid Svendsdatter.

In the mid-980s, Swein revolted against his father, Harald Bluetooth, and seized the throne. Harald was driven into exile and died shortly afterwards in November 986 or 987. In 1000, with the allegiance of Eric, Earl of Lade, Swein ruled most of Norway. In 1013, shortly before his death, he became the first Danish king of the English after a long effort.

Viking activity in the British Isles occurred during the Early Middle Ages, the 8th to the 11th centuries CE, when Scandinavians travelled to the British Isles to raid, conquer, settle and trade. They are generally referred to as Vikings, but some scholars debate whether the term Viking represented all Scandinavian settlers or just those who used violence.

At the start of the early medieval period, Scandinavian kingdoms had developed trade links reaching as far as southern Europe and the Mediterranean, giving them access to foreign imports, such as silver, gold, bronze, and spices. These trade links also extended westwards into Ireland and Britain.

The North Sea Empire, also known as the Anglo-Scandinavian Empire, was the personal union of the kingdoms of England, Denmark and Norway for most of the period between 1013 and 1042 towards the end of the Viking Age. This ephemeral Norse-ruled empire was a thalassocracy, its components only connected by and dependent upon the sea.

The first king to unite all three kingdoms was Sweyn Forkbeard, king of Denmark since 986 and of Norway since 1000, when he conquered England in 1013. He died in the following year, and his realm was divided. His son Cnut the Great acquired England in 1016, Denmark in 1018 and Norway in 1028. He died in 1035 and his realm was again divided, but his successor in Denmark, Harthacnut, inherited England in 1040 and ruled it until his death in 1042. At the height of his power, when Cnut ruled all three kingdoms (1028–1035), he was the most powerful ruler in western Europe after the Holy Roman Emperor.