Seems we need to take our country back as well according to my invstigation
The 400 years following the collapse of Roman rule is the most difficult to interpret in the history of Wales.[35] After the Roman departure from Britain in 410, much of the lowlands of Britain to the east and south-east were overrun by various Germanic tribes.[42] However by 500 AD, the land that would become Wales had divided into number of kingdoms free from Anglo-Saxon rule.[35] The kingdoms of Gwynedd, Powys, Dyfed and Seisyllg, Morgannwg and Gwent emerged as independent Welsh successor states.[35] Archaeological evidence, in the Low Countries and what was to become England, shows early Anglo-Saxon migration to Great Britain reversed between 500 to 550, which concurs with Frankish chronicles.[43] John Davies notes this as consistent with the British victory at Badon Hill, attributed to Arthur by Nennius.[43] This tenacious survival by the Romano-Britons and their descendants in the western kingdoms was to become the foundation of what we now know as Wales. With the loss of the lowlands, England's kingdoms of Mercia and Northumbria, and later Wessex, wrestled with Powys, Gwent and Gwynedd to define the frontier between the two peoples.
Having lost much of what is now the West Midlands to Mercia in the 6th and early 7th centuries, a resurgent late-seventh-century Powys checked Mercian advancement. Aethelbald of Mercia, looking to defend recently acquired lands, had built Wat's Dyke. According to John Davies, this endeavour may have been with Powys king Elisedd ap Gwylog's own agreement, however, for this boundary, extending north from the valley of the River Severn to the Dee estuary, gave Oswestry to Powys.[44] Another theory, after carbon-dating placed the dyke's existence 300 years earlier, is that it may have been built by the post-Roman rulers of Wroxeter.[45] King Offa of Mercia seems to have continued this consultative initiative when he created a larger earthwork, now known as Offa's Dyke (Clawdd Offa). Davies wrote of Cyril Fox's study of Offa's Dyke: "In the planning of it, there was a degree of consultation with the kings of Powys and Gwent. On the Long Mountain near Trelystan, the dyke veers to the east, leaving the fertile slopes in the hands of the Welsh; near Rhiwabon, it was designed to ensure that Cadell ap Brochwel retained possession of the Fortress of Penygadden." And, for Gwent, Offa had the dyke built "on the eastern crest of the gorge, clearly with the intention of recognizing that the River Wye and its traffic belonged to the kingdom of Gwent."[44] However, Fox's interpretations of both the length and purpose of the Dyke have been questioned by more recent research.[46] Offa's Dyke largely remained the frontier between the Welsh and English, though the Welsh would recover by the 12th century the area between the Dee (Afon Dyfrdwy), and the Conwy known then as Y Berfeddwlad. By the eighth century, the eastern borders with the Anglo-Saxons had broadly been set.
In 853 the Vikings raided Anglesey, but in 856 Rhodri Mawr defeated and killed their leader, Gorm.[47] The Britons of Wales later made their peace with the Vikings and Anarawd ap Rhodri allied with the Norsemen occupying Northumbria to conquer the north.[48] This alliance later broke down and Anarawd came to an agreement with Alfred, king of Wessex, with whom he fought against the west Welsh. According to Annales Cambriae, in 894, "Anarawd came with the Angles and laid waste Ceredigion and Ystrad Tywi."[49]
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