Harrying of the North as a prevention of Danish invasions
Harrying made North less valuable as livestock and crops died. Salt was ploughed into the soil to prevent the ability for crops to regrow. This would discourage the Danes from invading the North despite the fact it was Danelaw.
100,000 died from starvation. Slavery and cannibalism. (1086)-60% of Yorkshire was classed as wasteland. Major loss of land from Saxons- given to Normans.