The battle of Brunanburh is mentioned or alluded to in over forty Anglo-Saxon, Irish, Welsh, Scottish, Norman and Norse medieval texts. One of the earliest and most informative sources is the Old English poem "
Battle of Brunanburh" in the
Anglo-Saxon Chronicle (version A), which was written within two decades of the battle. The poem relates that Æthelstan and Edmund's army of West Saxons and Mercians fought at Brunanburh against the Vikings under Anlaf (i.e. Olaf Guthfrithson) and the Scots under Constantine. After a fierce battle lasting all day, five young kings, seven of Anlaf's earls, and countless others were killed in the greatest slaughter since the Anglo-Saxon invasions. Anlaf and a small band of men escaped by ship over
Dingesmere (or Ding's Mere) to Dublin. Constantine's son was killed, and Constantine fled home. Another very early source, the Irish
Annals of Ulster, calls the battle "a huge war, lamentable and horrible". It notes Anlaf's return to Dublin with a few men the following year, associated with an event in the spring. In its only entry for 937, the mid/late 10th-century Welsh chronicle
Annales Cambriae laconically states "war at Brune".
Æthelweard's
Chronicon (ca. 980) says that the battle at "Brunandune" was still known as "the great war" to that day, and no enemy fleet had attacked the country since.
Eadmer of Canterbury's
Vita Odonis (very late 11th century) is one of at least six medieval sources to recount
Oda of Canterbury's involvement in a miraculous restitution of Æthelstan's sword at the height of the battle.
William Ketel's
De Miraculis Sancti Joannis Beverlacensis (early 12th century) relates how, in 937, Æthelstan left his army on his way north to fight the Scots at Brunanburh, and went to visit the tomb of
Bishop John at
Beverley to ask for his prayers in the forthcoming battle. In thanksgiving for his victory, Æthelstan gave certain privileges and rights to the church at Beverley. According to
Symeon of Durham's
Libellus de exordio (1104–15): :::…in the year 937 of the Lord´s Nativity, at Wendune which is called by another name Et Brunnanwerc or Brunnanbyrig, he [Æthelstan] fought against Anlaf, son of former king Guthfrith, who came with 615 ships and had with him the help of the Scots and the Cumbrians.
John of Worcester's
Chronicon ex chronicis (early 12th century) was an influential source for later authors and compilers. It corresponds closely to the description of the battle in the Anglo-Saxon Chronicle, but adds that: :::Anlaf, the pagan king of the Irish and many other islands, incited by his father-in-law Constantine, king of the Scots, entered the mouth of the River Humber with a strong fleet. Another influential work,
Gesta regum Anglorum by
William of Malmesbury (1127) adds the detail that Æthelstan "purposely held back", letting Anlaf advance "far into England".
Michael Wood argues that, in a twelfth-century context, "far into England" could mean anywhere in southern
Northumbria or the
North Midlands. William of Malmesbury further states that Æthelstan raised 100,000 soldiers. He is at variance with Symeon of Durham in calling Anlaf "son of
Sihtric” and asserting that Constantine himself had been slain.
Henry of Huntingdon's
Historia Anglorum (1133) adds the detail that Danes living in England had joined Anlaf's army. Michael Wood argues that this, together with a similar remark in the
Annals of Clonmacnoise, suggests that Anlaf and his allies had established themselves in a centre of Anglo-Scandinavian power prior to the battle. The mid-12th century text
Estoire des Engleis, by the Anglo-Norman chronicler
Geoffrey Gaimar, says that Æthelstan defeated the Scots, men of
Cumberland, Welsh and
Picts at "Bruneswerce". The
Chronica de Mailros (1173–4) repeats Symeon of Durham's information that Anlaf arrived with 615 ships, but adds that he entered the mouth of the river
Humber. ''
Egil's Saga is an Icelandic saga written in Old Norse in 1220–40, which recounts a battle at Vínheiðr
(Vin-heath) by Vínuskógr
(Vin-wood) near Vínu''; it is generally accepted that this refers to the Battle of Brunanburh. Egil's Saga contains information not found in other sources, such as military engagements prior to the battle, Æthelstan's use of Viking mercenaries, the topology of the battlefield, the position of Anlaf's and Æthelstan's headquarters, and the tactics and unfolding of events during the battle. Historians such as
Sarah Foot argue that Egil's Saga may contain elements of truth but is not an historically reliable narrative.
Pseudo-Ingulf's
Ingulfi Croylandensis Historia (ca. 1400) recounts that: The
Annals of Clonmacnoise (an early medieval Irish chronicle of unknown date that survives only in an English translation from 1627) states that: :::Awley [i.e. Anlaf], with all the Danes of Dublin and north part of Ireland, departed and went overseas. The Danes that departed from Dublin arrived in England, & by the help of the Danes of that kingdom, they gave battle to the Saxons on the plaines of othlyn, where there was a great slaughter of Normans and Danes. The
Annals of Clonmacnoise records 34,800 Viking and Scottish casualties, including Ceallagh the prince of Scotland (Constantine's son) and nine other named men. ==Aftermath==