The harrying of the north. Two years after William the Conqueror defeated King Harold at Hastings, the north of England rose up against him. In a savage episode, William relentlessly devastated the countryside and slaughtered its inhabitants. From Look and Learn 883 (16 December 1978).
The Harrying of the North, 1069 - After 1066 the region was suppressed, but also harnessed as a source of strength for England over the centuries. Despite the harrying, the DNA patterns of around 600CE are still, mostly intact. - Jórvík - Yorkshire