In 821, Coenwulf himself was succeeded by his brother Ceolwulf, who demonstrated his military prowess by his attack on and destruction of the fortress of Deganwy in Powys.
The power of the West Saxons under Egbert was rising during this period, however, and in 825 Egbert defeated the Mercian king Beornwulf (who had overthrown Ceolwulf in 823) at Ellendun.
Beornwulf was slain suppressing a revolt amongst the East Angles, and his successor, a former ealdorman named Ludeca, met the same fate.
Cenwulf himself was succeeded by his brother Ceolwulf, who demonstrated his military prowess by his attack and destruction on the fortress of Deganwy[?] in Powys.
This did not dissuade Egbert (802 - 839), king of Wessex, from revolting from his overlordship, and Egbert defeated his successor Beornwulf[?] at Ellendun in 825.
Beornwulf was slain suppressing a revolt amongst the East Angles, and his successor (a former ealdormen Ludeca) held the fraying strands of Mercia together for only four more years until Egbert conquered Mercia.