William created the system to retain power and to control the population.
William the Conqueror instituted the feudal system to govern with when he won the Battle of Hastings in 1066.
It started when he became king in 1066. The feudal system was with the king at the top then the barons then came the knights then the peasant's.
The feudal form of control and depending on where you were William the Conqueror in 1066 and Constantine.
1066-1500
William of Normandy, William the Conqueror, William the Bastard, William I.
The French noblemen who followed William the Conqueror in his enterprise, were rewarded with English land grants in fief by the new king. They swore to William feudal oath becoming Barons of England.
William I who was also called William the Conqueror was the King of Great Britain in 1066. William the Conqueror ascended to power in 1066 and died in 1087.
William of Normandy invaded England in 1066
Basically, how William changed it to suit his needs was a difference in itself not only that but he also introduced castles the feudal system stayed the same I guess
William won the Battle of Hastings 1066 14th October
25 December 1066.
At the battle of Hasting in 1066