Background
Amaury was the son of Simon I, seigneur de Montfort, and his wife Agnès d"Évreux, daughter of Richard, Count of Évreux.
Amaury was the son of Simon I, seigneur de Montfort, and his wife Agnès d"Évreux, daughter of Richard, Count of Évreux.
But Amaury quickly surrendered and joined William"s army. When Simon II died c. 1104, Amaury succeeded him as seigneur de Montfort. Amaury was Henry"s most detested enemy.
Amaury was the last person he wanted holding a countship in the center of Normandy.
After complaining to Louis VI the French king granted the countship of Évreux to Amaury. Finally Henry offered Amaury the countship of Évreux if he would surrender the castle.
Amaury refused and the rebellion continued with Amaury now encouraging more Normans to defy Henry. In 1119 Henry besieged the castle of Évreux anew, but Theobald II, Count of Champagne, Henry"s nephew, negotiated a truce between them.
Amaury surrendered the castle to the King and on doing so was confirmed as count of Évreux by Henry.
The following year Amaury fought at the battle of Bourgtheroulde supporting William Clito against Henry I but was captured fleeing the field by William de Grandcourt. Rather than turn over his prisoner to Henry, however, William decided to go into exile with Amaury. Amaury made peace with the King later that same year and for the rest of Henry"s reign remained on good terms with him.
In 1098, William Rufus was campaigning in France and had just crossed into the French Vexin and one of the first castles attacked was that of Houdan which Amaury III defended. But Simon and the other castellans successfully defended themselves against the forces of William Rufus until a truce was called and William returned to England.