On October 14th, 1066, the English army, led by King Harold II, was defeated by Duke William and the Normans at the Battle of Hastings. Most people will remember this famous story from their school days, particularly the gruesome image of King Harold with an arrow in the eye. read more
The biggest impact was the harrying of the North in (I think) 1087 when perhaps a third of the population was killed. All the AS aristocracy were displaced or killed. Today this would be described as genocide. People owning their land became tenants paying rent to a Norman lord. read more
Nevertheless, the Norman Conquest still bought many changes. The following is a list of the major effects. Anglo-Saxon elites, the largest landholders in England, were replaced by Franco-Normans. read more