Battle of Ellandun

Battle of Ellandun
Date 825 Location near Swindon, Wiltshire Result West Saxon victory
Belligerents
Mercia	Wessex
Commanders and leaders
King Beornwulf of Mercia	King Egbert of Wessex

Ellandun was the site of the Battle of Ellandun between Egbert of Wessex and Beornwulf of Mercia in 825. Sir Frank Stenton described it as "One of the most decisive battles of English history", effectively ending the Mercian supremacy over the English kingdoms and establishing West Saxon dominance in southern England.

Background

During the 8th century and early 9th centuries the kings of Mercia had exercised a fluctuating hegemony over the kingdoms of south-eastern England, imposing their overlordship and at times exercising direct rule. While Wessex had at times been obliged to recognise the overlordship of King Aethelbald of Mercia (716-57), it appears to have escaped the dominance of the Mercians thereafter, and was certainly not subject to the more intrusive forms of Mercian control imposed on other kingdoms.

King Ecgberht's father Ealhmund had been King of Kent in the 780s, bringing the family into conflict with the ambitions of Offa of Mercia (757-96), who sought to impose direct rule on Kent. After his father's death, Ecgberht was driven from England into exile by Offa, with the cooperation of Beorhtric of Wessex (786-802), and his accession to the throne of Wessex on Beorhtric's death was immediately followed by a violent clash with Mercia. However, the available sources reveal no further conflict between the two kingdoms before 825.

Beornwulf had seized the Mercian throne from Ceolwulf (821-3), who had succeeded on the death of his brother, the long-reigning and powerful King Coenwulf (796-821). His attack on Wessex two years later may have been part of an effort to consolidate his own authority and reassert that of Mercia after this upheaval.

Beornwulf may also have been seeking to take advantage of Ecgberht's preoccupation with warfare against the Britons of Cornwall. Ecgberht had devastated Cornish territory in 815, and in August 825 he was again campaigning against the Britons, following a clash between them and the inhabitants of the West Saxon frontier territory of Devon earlier in the year.

Location

Ellandun is thought to be south of Swindon, Wiltshire but the exact site is not known. Wroughton was suggested by Charles Oman, based on geographical information and contemporary boundaries. T. Spicer has suggested the battle took place on the grounds of what is now Lydiard Park, Swindon.

Consquences

Ecgberht's victory immediately and permanently transformed the political situation in south-eastern England. The king at once sent his son Aethelwulf with an army into the south-east, where the West Saxons succeeded in conquering Surrey and Sussex, hitherto under direct Mercian rule, and Kent and Essex, which had been governed by sub-kings under Mercian overlordship. All of these territories were annexed to Wessex, roughly doubling the kingdom's size.

Meanwhile, Beornwulf's defeat emboldened the East Angles to revolt against Mercian rule and revive their own kingdom, in alliance with Wessex. Beornwulf marched against them but was defeated and killed. His successor Ludeca met the same fate the following year and East Anglian independence was successfully established.

Ecgberht's power peaked in 829, when he occupied Mercia and secured recognition of his supremacy by the Northumbrians, making him momentarily the overlord of all England. Mercian independence was restored the following year by Wiglaf, who achieved a significant recovery of Mercian prestige and was even able to extend his power over Berkshire. However, the independence of East Anglia and West Saxon conquest of the south-east proved irreversible, and Mercia never regained the primacy it had enjoyed in the century before Ellandun.

Bibliography

• Stenton, Frank. Anglo-Saxon England. Oxford University Press, 1943/2001. ISBN 0-19-280139-2, ISBN 9780192801395.
• Burne, A.H. The Battlefields of England. Pen and Sword Books, 1950/2005. ISBN 1-84415-206-5, ISBN 9781844152063.
• Savage, Anne. The Anglo-Saxon Chronicles. Coombe Books, 1996. ISBN 1-85833-478-0, ISBN 9781858334783.

• Marren, Peter. Battles of the Dark Ages. Pen and Sword Books, 2006. ISBN 1-84415-270-7, ISBN 9781844152704.