King Harold II of England was defeated at the Battle of Hastings in 1066. This pivotal confrontation occurred on October 14 when Norman forces, led by William the Conqueror, invaded England, resulting in a decisive Norman victory. Harold's defeat marked the end of Anglo-Saxon rule in England and ushered in the Norman Conquest, significantly altering the cultural and political landscape. This battle led to the establishment of Norman feudalism, changes in land ownership, and profound impacts on the English language and governance. The event is a key milestone in medieval history, symbolizing the transference of power and the intertwining of Norman and English cultures.