The Norman Conquests refer to a series of military campaigns in the 11th century, primarily led by the Normans, a group of people from what is now northern France. The most significant event was the Norman Conquest of England in 1066, when William the Conqueror, the Duke of Normandy, defeated King Harold II at the Battle of Hastings. This victory resulted in the establishment of Norman rule in England. In addition to England, the Normans also expanded their influence in other regions, including parts of Italy and Wales. The conquests led to significant cultural and political changes, including the introduction of the feudal system and the construction of iconic structures like castles. These events shaped the course of European history and the development of medieval society.