The Norman Conquest refers to the invasion and subsequent occupation of England by the Normans in 1066. Led by William the Conqueror, the Duke of Normandy, this event began with the Battle of Hastings, where William defeated King Harold II. This victory marked the end of Anglo-Saxon rule in England and the beginning of Norman dominance. Following the conquest, the Normans introduced significant changes to English society, including the feudal system and the construction of castles. The Domesday Book, a comprehensive survey of land and resources, was created to assess the wealth of the kingdom. This period greatly influenced the English language and culture.