In England and Normandy Henry tried to change the rules of knight-service, forcing the barons to supply more men.

Most men joined Young Henry not because they regarded him as the juster cause, but because the king as trampling on the necks of the proud and haughty.

Nearly all the earls and barons of England, Normandy, Aquiatine, Anjou and Brittany rose against the King

Angered the barons through his unprecedented intrusion to the affairs of England's great men - In 1166 he demanded a written list of the tenant-in-chief who owned oaths of loyalty to the king, and how much scutage could be placed on the tenants-in-chief for their knights.