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St Oswald (c. 605—642) king of Northumbria

Cadwallon (d. 634) king of Gwynedd


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battle of Heavenfield

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Fought near Hexham. Oswald of Northumbria defeated and killed Cadwallon of Gwynedd, who had been ravaging the province after slaying Osric of Deira and Eanfrith of Bernicia (brother of Oswald) the year before. Through this victory Oswald secured his own position as king of both Bernicia and Deira and ensured that Northumbria would return to Christianity after a year of apostasy.

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