and Deira. To the north were the Picts (now also accepted as Brittonic speakers prior to Gaelicisation) with the Gaelic kingdom of Dál Riata to the northwest. All of these peoples would play a role in the history of the Old North. Historical context From a historical perspective, wars were frequently internecine, and Britons were aggressors as well as defenders, as was also true of the Angles, Picts, and Gaels. However, those Welsh stories of the Hen Ogledd that tell of Britons fighting Anglians have a counterpart, told from the opposite side. The story of the demise of the kingdoms of the Old North is the story of the rise of the Kingdom of Northumbria from two coastal kingdoms to become the premier power in Britain north of the Humber and south of the Firth of Clyde and the Firth of Forth. The interests of kingdoms of this era were not restricted to their immediate vicinity. Alliances were not made only within the same ethnic groups, nor were enmities restricted to nearby different ethnic groups. An alliance of Britons fought against another alliance of Britons at the Battle of Arfderydd. Áedán mac Gabráin of Dál Riata appears in the Bonedd Gwŷr y Gogledd, a genealogy among the pedigrees of the Men of the North. The Historia Brittonum states that Oswiu, king of Northumbria, married a Briton who may have had some Pictish ancestry. A marriage between the Northumbrian and Pictish royal families would produce the Pictish king Talorgan I. Áedán mac Gabráin fought as an ally of the Britons against the Northumbrians. Cadwallon ap Cadfan of the Kingdom of Gwynedd allied with Penda of Mercia to defeat Edwin of Northumbria. Conquest and defeat did not necessarily mean the extirpation of one culture and its replacement by another. The Brittonic region of northwestern England was absorbed by Anglian Northumbria in the 7th century, yet it would re-emerge 300 years later as South Cumbria, joined with North Cumbria (Strathclyde) into a single state. Societal context The organisation of the Men of the North was tribal, based on kinship groups of extended families, owing allegiance to a dominant "royal" family, sometimes indirectly through client relationships, and receiving protection in return. For Celtic peoples, this organisation was still in effect hundreds of years later, as shown in the Irish Brehon law, the Welsh Laws of Hywel Dda, and the Scottish Laws of the Brets