King of England (978–1016), whose long reign of renewed Viking invasions, Danegeld, and misgovernment ended in the Danish conquest of England by Sweyn Forkbeard and Cnut.
Æthelred II, remembered by the mocking byname "the Unready" — from Old English Unræd, "ill-advised" or "no counsel" — was king of England from 978 to 1016. He came to the throne as a boy after the murder of his half-brother Edward, a crime that shadowed his reign from the start, and ruled for nearly forty disastrous years.
His reign saw the return of massive Viking assaults, which he met by paying vast tributes of silver — the Danegeld — that only invited more. His government was undermined by treachery and mistrust, worsened by the notorious St Brice's Day massacre of Danes in 1002, and finally overwhelmed when Sweyn Forkbeard of Denmark conquered England in 1013. Æthelred fled, briefly returned, and died in 1016 as his son Edmund Ironside carried on the fight against Sweyn's son Cnut.
Æthelred was born about 966, the son of Edgar the Peaceful and his queen Ælfthryth. He was a child of perhaps twelve when his half-brother Edward was murdered at Corfe in 978 — a killing from which Æthelred was the sole beneficiary, and in which his mother's faction was widely implicated. He was crowned king within weeks, but the taint of that blood clung to his kingship.
Æthelred has come down as the archetype of the failed king, and his pun-name — Æthelred Unræd, "Noble-counsel the No-counsel" — fixed that judgement for all time. The sources, above all the vivid, despairing account in the Anglo-Saxon Chronicle written after the disasters, present a ruler who was irresolute, suspicious, and prone to violent, treacherous acts that backfired.
Historians have softened the caricature: his government was administratively sophisticated, his law-making serious, and the sheer scale and persistence of the Viking onslaught would have tested any king. Yet the pattern of the reign — great tributes paid and then betrayed, commanders distrusted and dismissed, panic-stricken cruelties like the St Brice's Day massacre — does suggest a king who never mastered his own magnates or his enemies. He remains the byword for misrule at the end of Anglo-Saxon England.
From the 980s and 990s, Viking fleets returned to England in force, led by such figures as Olaf Tryggvason and later Sweyn Forkbeard. Unable to defeat them, Æthelred bought them off with escalating payments of silver, the Danegeld, raised by heavy taxation — a policy that filled the raiders' ships and encouraged their return. In 1002, in a fit of fear and mistrust, he ordered the massacre of Danes living in England on St Brice's Day, an atrocity that, by tradition, killed a sister of Sweyn Forkbeard and hardened Danish enmity.
The assaults grew into a campaign of conquest. In 1013 Sweyn Forkbeard overran England and was accepted as king; Æthelred fled to Normandy, to the court of his brother-in-law. Sweyn's sudden death early in 1014 allowed Æthelred to return, but his position was broken.
Æthelred died in London on 23 April 1016, as Sweyn's son Cnut pressed the conquest of England. He was buried in Old St Paul's. His son Edmund Ironside took up the desperate fight against Cnut, but within months the Danish conquest was complete.
Æthelred the Unready is remembered as the king who lost England to the Danes, the disastrous close of the House of Wessex's tenth-century greatness. His reign's failures — the endless Danegeld, the St Brice's Day massacre, the collapse before Sweyn and Cnut — became a lasting lesson in misgovernment. Yet his blood ran on: through his son Edward the Confessor the old line would briefly return, and through his Norman marriage he helped forge the tie that would bring William the Conqueror to England fifty years later.