Final answer:
The Norman Conquest in 1066 led by William the Conqueror was a significant event that changed English culture, governance, and feudal system.
Step-by-step explanation:
The Norman Conquest refers to the invasion and occupation of England by the Normans, led by William the Conqueror, in 1066. William, a duke from Normandy in northern France, claimed the English crown and defeated the Anglo-Saxon King Harold II at the Battle of Hastings. This historic event reshaped England's identity, introducing Norman culture and feudalism, blending it with the existing Anglo-Saxon traditions, leading to a transformation in the language, architecture, and the administrative systems of England.