The ancient Roman Legionary fortress of Eboracum had been occupied by the Northumbrian Angles following the departure of the Roman military. The great walls were still standing and from the 6th century onwards, it developed into Northumbria’s capital city.
The Viking’s initial incursions into Wales were raids to capture booty and slaves.
The vast majority of these raids and their outcomes are highly unlikely to have been recorded.
Wales during this period consisted of a number of tribal Kingdoms whose inhabitants were able to use the terrain to their advantage by exploiting their skill at guerrilla warfare by launching ambushes on invading enemies and then retreating into their mountain fastnesses. Full on pitched battles were rare.