After his deposition, submission, or death, Mercian control was restored under Coenwulf and the East Anglians lost their independence for a quarter of a century.
It perhaps also included the eastern part of the Fens in Cambridgeshire, a region that was disputed between the East Angles and their neighbours, the Mercians.
[1] Created in the wake of the Anglo-Saxon settlement of Britain, the kingdom was ruled from the 6th century by the Wuffingas, the most powerful member of the dynasty being Rædwald, the first definitely known to have been king.
[3][4] After Ælfwald, the East Angles were ruled independently by kings of unknown lineage, until in 794 Æthelberht was killed on the order of Offa of Mercia, who then consolidated his control over the kingdom.
[11] Evidence from coins minted at this time suggests the East Angles seemed to have regained their independence for a short period after Ecgfrith's death, with Eadwald as their king,[12] but the East Angles were then reconquered after Coenwulf became king of Mercia in 798, during a campaign in which the kingdom of Kent was also brought back under Mercian control.