The Anglo-Saxon Chronicle does not say who was the aggressor at Ellandun, but one recent history asserts that Beornwulf was almost certainly the one who attacked. According to this view, Beornwulf may have taken advantage of the Wessex campaign in Dumnonia in the summer of 825. Beornwulf's motivation to launch an attack would have been the threat of unrest or instability in the southeast: the dynastic connections with Kent made Wessex a threat to Mercian dominance.
the anglo-saxon chronicle does not say who was the aggressor at ellandun but one recent history asserts that beornwulf was almost certainly the one who attacked according to this view beornwulf may have taken advantage of the wessex campaign in dumnonia in the summer of 825 beornwulf's motivation to launch an attack would have been the threat of unrest or instability in the southeast the dynastic connections with kent made wessex a threat to mercian dominance