Two charters of 681 show Æthelred granting land near Tetbury, on what is now the border between Gloucestershire and Wiltshire.
Mercia | Ælfgar, Earl of Mercia | Æthelred the Unready | Offa of Mercia | Æthelbald of Mercia | Beornwulf of Mercia | Wulfhere of Mercia | Penda of Mercia | Edwin, Earl of Mercia | Ecgfrith of Mercia | Wiglaf of Mercia | Leofric, Earl of Mercia | Coenwulf of Mercia | West Mercia Police Authority | Peada of Mercia | Mercia Mudstone Group | Ludeca of Mercia | Eowa of Mercia | Earl of Mercia | Ceolwulf I of Mercia | Æthelred of Wessex | Æthelred of Mercia | Æthelred I of Northumbria | Ælfflæd of Mercia |
During this period of expansion, the Mercian province of Lindsey was lost to Northumbria in 661, but its recapture by Æthelred of Mercia, following the Battle of the Trent in 679, secured Mercia’s position as the dominant Anglo-Saxon power for over a century.