Offa appears on the continental scene more than had any previous English king. Charles wrote to him as “his dearest brother” and wished for a marriage between his own son Charles and Offa’s daughter. Offa’s refusal, unless Charles let one of his daughters marry Offa’s son Ecgfrith, led to a three-year quarrel in which Charles closed his ports to traders from England. This and a letter about regulating trade, written when the quarrel was over, provide evidence for the importance of cross-Channel trade, which was one reason for Offa’s reform of the coinage.
Imitating the action of Pippin III in 755, Offa took responsibility for the coinage, and thenceforward the king’s name normally appeared on coins. But the excellent quality in design and workmanship of his coins, especially those with his portrait, served an additional purpose: they had a propaganda value in bringing home the preeminence of the Mercian king not only to his English subjects but also to people on the Continent. Pope Adrian I regarded Offa with awe and respect.
Because Offa’s laws are lost, little is known of his internal government, though Alcuin praises it. Offa was able to draw on immense resources to build a dike to demarcate his frontier against Wales. In the greatness of its conception and the skill of its construction, the dike forms a fitting memorial to him. It probably belongs to his later years, and it secured Mercia from sudden incursions. The church and scholarship in Offa’s time
Northumbria was still preeminent in scholarship, and the fame of the school of York, founded by Bede’s pupil Archbishop Egbert, attracted students from the Continent and from Ireland. Eventually it supplied Alcuin to take charge of the revival of learning inaugurated by Charles the Great; Alcuin’s writings exercised great influence on theological, biblical, and liturgical studies, and his pupils carried on his work well into the 9th century.
Learning was not confined to Northumbria; one Latin work was produced in East Anglia, and recent attribution of manuscripts to Lichfield suggests that Mercian scholarship has been underestimated. Offa himself took an interest in education, and men from all areas corresponded with the missionaries. The Mercian schools that supplied Alfred with scholars in the 9th century may go back to this period. Vernacular poetry was composed, perhaps including Beowulf and the poems of Cynewulf.
A steady advance was made in the creation of parishes, and monasticism flourished and received support from Offa. A great event in ecclesiastical history was the arrival of a papal legation in 787, the first since the conversion. It drew up reforming statutes, which were accepted by the two ecclesiastical provinces, meeting separately under the presidency of Offa and Aelfwald of Northumbria. Offa used the visit to secure the consecration of his son—the first recorded coronation ceremony in England—and also to have Mercia made into a metropolitan province with its see at Lichfield. The latter seemed desirable partly because he disliked the Kentish archbishop of Canterbury, Jaenberht, but also because it would seem fitting to him that the leading kingdom should be free from external interference in ecclesiastical affairs. This move was unpopular with the church, and in 802, when relations with Canterbury had improved, the archbishopric of Lichfield was abolished. The decline of Mercia and the rise of Wessex
Offa died in 796, and his son died a few weeks later. Cenwulf, their successor, suppressed revolts in Kent and East Anglia, but he never attained Offa’s position. Cenwulf allowed Charles to intervene in Northumbria in 808 and restore Eardwulf (who had been driven from his kingdom) to the throne—a unique incident in Anglo-Saxon history. Mercian influence in Wessex was ended when Egbert became king there in 802, though there is no recorded warfare between the kingdoms for many years, during which Egbert conquered Cornwall and Cenwulf fought in Wales. But in 825 Egbert defeated Beornwulf of Mercia and then sent an army into Kent, with the result that he was accepted as king of Kent, Surrey, Sussex, and Essex. In that same year the East Angles threw off the Mercian yoke, killing Beornwulf. In 829 Egbert became ruler of Mercia and all regions south of the Humber, which caused the chronicler to add his name to Bede’s list of kings who held the imperium, calling him bretwalda. The Northumbrians accepted Egbert without fighting. Yet he held this proud position only one year; then Wiglaf recovered the Mercian throne and ruled without subjection to Egbert.
By this time Danish Viking raids were a grave menace, and Aethelwulf, who succeeded his father Egbert in 839, had the wisdom to see that Mercia and Wessex must combine against the Vikings. Friendly relations between them were established by marriage alliances and by a peaceful settlement of boundaries; this paved the way for the acceptance in 886 of Alfred, king of Wessex, as lord of all the English who had not fallen under Danish rule. The period of the Scandinavian invasions Viking invasions and settlements
Small scattered Viking raids began in the last years of the 8th century; in the 9th century large-scale plundering incursions were made in Britain and in the Frankish empire as well. Though Egbert defeated a large Viking force in 838 that had combined with the Britons of Cornwall and Aethelwulf won a great victory in 851 over a Viking army that had stormed Canterbury and London and put the Mercian king to flight, it was difficult to deal with an enemy that could attack anywhere on a long and undefended coastline. Destructive raids are recorded for Northumbria, East Anglia, Kent, and Wessex.
A large Danish army came to East Anglia in the autumn of 865, apparently intent on conquest. By 871, when it first attacked Wessex, it had already captured York, been bought off by Mercia, and had taken possession of East Anglia. Many battles were fought in Wessex, including one that led to a Danish defeat at Ashdown in 871. Alfred the Great, a son of Aethelwulf, succeeded to the throne in the course of the year and made peace; this gave him a respite until 876. Meanwhile the Danes drove out Burgred of Mercia, putting a puppet king in his place, and one of their divisions made a permanent settlement in Northumbria.
Alfred was able to force the Danes to leave Wessex in 877, and they settled northeastern Mercia; but a Viking attack in the winter of 878 came near to conquering Wessex. That it did not succeed is to be attributed to Alfred’s tenacity. He retired to the Somerset marshes, and in the spring he secretly assembled an army that routed the Danes at Edington. Their king, Guthrum, accepted Christianity and took his forces to East Anglia, where they settled.
The importance of Alfred’s victory cannot be exaggerated. It prevented the Danes from becoming masters of the whole of England. Wessex was never again in danger of falling under Danish control, and in the next century the Danish areas were reconquered from Wessex. Alfred’s capture of London in 886 and the resultant acceptance of him by all the English outside the Danish areas was a preliminary to this reconquest. That Wessex stood when the other kingdoms had fallen must be put down to Alfred’s courage and wisdom, to his defensive measures in reorganizing his army, to his building fortresses and ships, and to his diplomacy, which made the Welsh kings his allies. Renewed attacks by Viking hosts in 892–896, supported by the Danes resident in England, caused widespread damage but had no lasting success. Alfred’s government and his revival of learning
Good internal government contributed to Alfred’s successful resistance to the Danes. He reorganized his finances and the services due from thegns, issued an important code of laws, and scrutinized carefully the exercise of justice. Alfred saw the Viking invasions as a punishment from God, especially because of a neglect of learning, without which men could not know and follow the will of God. He deplored the decay of Latin and enjoined its study by those destined for the church, but he also wished all young freemen of adequate means to learn to read English, and he aimed at supplying men with “the books most necessary for all men to know,” in their own language.