Feudalism developed in England from the 11th century. The Angles and Saxons from Central Europe had started living in England in the 6th century. The name England is a distortion of ‘Arigleland’.
In the 11th century William, the Duke of Normandy crossed the English Channel with an army and defeated the Saxon king. From then onwards, England and France became bitter enemies. They often fought with each other for lands and trade. William, I made a map of the country and distributed it among the 180 Norman Nobles who had migrated to England with him. These Nobles became the king’s most important vassals. They had to give the king military service. They also had the obligation to give a fixed number of knights to the king. Soon the nobles started giving part of their land to the knights.
In return, the knights had to give similar services to, The lords as the lords were giving to the king. But the nobles could not use the knights for their private wars, as it was prohibited in England. Anglo-Saxon farmers became the serfs of the landowners. This is how feudalism grew in England.