Offa of Mercia - Early Reign, The Midland Territories, and The Middle and East Saxons

Early Reign, The Midland Territories, and The Middle and East Saxons

Æthelbald, who had ruled Mercia since 716, was assassinated in 757. According to a later continuation of Bede's Historia Ecclesiastica (written anonymously after Bede's death) the king was "treacherously murdered at night by his own bodyguards", though the reason why is unrecorded. Æthelbald was initially succeeded by Beornred, about whom little is known. The continuation of Bede comments that Beornred "ruled for a little while, and unhappily", and adds that "the same year, Offa, having put Beornred to flight, sought to gain the kingdom of the Mercians by bloodshed." It is possible that Offa did not gain the throne until 758, however, since a charter of 789 describes Offa as being in the thirty-first year of his reign.

The conflict over the succession suggests that Offa needed to re-establish control over Mercia's traditional dependencies, such as the Hwicce and the Magonsæte. Charters dating from the first two years of Offa's reign show the Hwiccan kings as reguli, or kinglets, under his authority; and it is likely that he was also quick to gain control over the Magonsæte, for whom there is no record of an independent ruler after 740. Offa was probably able to exert control over the kingdom of Lindsey at an early date, as it appears that the independent dynasty of Lindsey had disappeared by this time.

Little is known about the history of the East Saxons during the eighth century, but what evidence there is indicates that both London and Middlesex, which had been part of the kingdom of Essex, were finally brought under Mercian control during the reign of Æthelbald. Both Æthelbald and Offa granted land in Middlesex and London as they wished; in 767 a charter of Offa's disposed of land in Harrow without a local ruler as witness. It is likely that both London and Middlesex were quickly under Offa's control at the start of his reign. The East Saxon royal house survived the eighth century, so it is probable that the kingdom of Essex retained its native rulers, but under strong Mercian influence, for most or all of the eighth century.

It is unlikely that Offa had significant influence in the early years of his reign outside the traditional Mercian heartland. The overlordship of the southern English which had been exerted by Æthelbald appears to have collapsed during the civil strife over the succession, and it is not until 764, when evidence emerges of Offa's influence in Kent, that Mercian power can be seen expanding again.