Through feudal law, William strengthened his practical influence over large and small lords and noble vassals, and reaped great economic and political benefits.

This was achieved by William through Article 2 of the feudal law.

The feudal law of the Norman kingdom clearly stated that when a vassal died, the vassal had the highest position in the entire system of social relations between the deceased and the family to which he belonged.

If the children of the vassals were under age at the time of their death, William, as king, had the right to exercise guardianship over them, to enjoy the benefits of their estates until they reached adulthood, and to have dominion over their marriages.

Or that King Philip II of France. Augustus came to Juli, and in 1081 the counts of Nevers and Auxerre died, leaving only a daughter named Agnès. Morality. For three years before the Countess of Agnès came of age and married, King Philip II of France plundered the wealth of his two provinces, Nevers and Auxerre, and then appointed her a husband, who was none other than his nephew, Pierre. Morality. Cornett, Pierre is not a simple person, he is one of the commanders of the later Fourth Crusade, the emperor of the Latin Empire and Constantinople, which will not be discussed here.

Through the custody of the children of deceased noble vassals and the domination of marriages, Philip II not only collected a large special inheritance tax granted to fiefs and titles, and plundered wealth in the two counts of Countess Agnès, but also incorporated these two domains into the rule of the royal family by controlling her marriage, which is the so-called killing three birds with one stone.

Philip II's treatment of the Countess of Agnès was not an isolated case, as he looted a great deal of wealth through the custody of the children of his vassals and the domination of marriage, and he also controlled many territories, even using force to openly invade the closed court in order to extort money.

Otherwise, how could the small royal domain, known as "Île-de-France", owned by Philip II at the time, compete with the vast Plantagenet dynasty? relied on the use of feudal law to loot the vassals and gradually accumulate wealth.

William naturally did not be as ruthless as Philip II, but in practice, he also exercised the two powers of guardianship and marriage domination over minor aristocratic vassals.

Through the guardianship of minor vassals, William set up a wide range of government agencies in his domain, and gradually incorporated the ruling power of the domain into the hands of the royal family, while the vassals under William's guardianship could only become nobles who enjoyed tax dividends like the Chinese princes when they grew up.

If it weren't for the fact that the Normandy family was thin and had limited collateral and in-laws, William might have followed Philip II's example and brought the vassals' domains under the control of the Norman royal family through the domination of the marriage of minor vassals.

Philip II is known as the greatest king of the Capetian dynasty and is revered as Augustus, and his feudal laws are exactly what William emulated.

For Philip II and the Capetian dynasty, the most valuable role of feudal law was to destroy the "empire" of the Plantagenet in Anjou.

Because of the feudal laws of France, the heirs of the Plantagenet dynasty were put under some kind of legal yoke because of the feudal allegiance customs.

When Philip II was only four years old, Henry II, already king of England, brought his son Richard to Paris and swore allegiance to the young Deposed II, with Henry II swearing allegiance to Philip II with his possession of Normandy and Anjou, and Richard for his Aquitaine.

Later, Philip II used Richard the Lionheart to oppose Henry II's rule.

After the tragic death of Richard the Lionheart, Philip II was given a second chance to intervene in the Plantagenet dynasty and England, taking advantage of the internal contradictions of the British royal family, which was a long-term strategy adopted by Capet.

At that time, the "Lionheart" Richard died without leaving an heir, and there were two people who had the right to inherit the throne, one was Richard's younger brother, the "Landless King" John, who preemptively ascended the throne when Richard died, and the second was the son of Richard's eldest brother, the young Duke of Brittany, Arthur.

The next operation of Philip II has some similarities with the "Glamorgan Dafa" created by the immature great magician.

Philip II traveled to Le Mans, north of Anjou, and brought the young Duke of Brittany, Arthur, under his tutelage, who then made Arthur Duke of Anjou, giving him Anjou and Enman.

Of course, both the title of Anjou and the two realms of Anjou and Enman were empty promises, both of which were in the hands of King John.

Even so, however, Philip II had a trump card to play, for he could take back the two large fiefdoms that Arthur had sealed off in the name of his youth, and even if it was only nominal, he could send troops to take it from King John.

In 1202, Philip II realized that the time was ripe and gave Arthur an armor ceremony, and Arthur immediately pledged his allegiance to Philip II, so that the Duchy of Brittany, which was independent of the Kingdom of France, was also under the jurisdiction of the Kingdom of France.

Later, at the official canonization ceremony, Philip II gave Arthur Anjou, Enman, and Aquitaine, which belonged to King John, but took the opportunity to bring Normandy under his direct rule, which was the convenience of the king's guardianship.

Later, Philip II, in the name of Arthur, officially launched a war for Normandy, Anjou, and Aquitaine, but during the war, Arthur was accidentally killed while attacking a castle.

Although history says that King John did it at this time, the author has reason to believe that Arthur's death is most likely secretly instructed by his guardian, King Philip II of France.

This can be seen from the fact that after Arthur's accidental death, Philip II became the greatest vested interest, and immediately after Arthur's death, he took advantage of the situation to attack the territories of Anjou, Mann, and Tours, and sent his officials to administer them, and from then on Normandy, Anjou, and northern Aquitaine came under the direct jurisdiction of Philip II.

Such a clever operation made William, who was familiar with this period of history, admire it.

Of course, in addition to these, there are several main articles in the "Norman Kingdom Feudal Law", one of which is to reaffirm the relevant provisions of the "Solberzli Oath", and clearly stipulate that when a vassal canonizes a subordinate city, such as a duke canonizing an earl, these people must first explicitly swear loyalty to the king when swearing allegiance to their vassal king.

As for the rest of the feudal law, it mainly listened to the advice of close vassals such as Duke Hubert and Duke Ladolph, and stipulated that when dividing the fiefdom with priority allegiance, each successor would no longer be loyal to the head of his family, but only to the owner of the fiefdom, so as to prevent the family from becoming more powerful.

One of the most important reasons why the Norman kingdom's feudal laws were so quickly adopted and confident was that the question of land possession and disposition of their inheritance had become an increasingly difficult and unresolved problem, and it was desirable to formulate and promulgate feudal laws.