On March 22, 1037, three months passed in a hurry, and William, with the help of Hubert and other close confidants, finally put down many rebellions in the county of Mortan, so that no one in the entire county of Mortan dared to disobey William's orders.

With the help of Baron Adolf and hundreds of officials and nobles, William initially established a solid rule in the Mortan region, and administrative institutions at all levels such as counties, districts, counties (cities), and towns have been initially established, whether it is a town, a noble estate, or a church parish, William can extend his tentacles to any area of Moldan and mobilize more than several times more manpower and material resources than before.

After leaving behind the defensible Lieutenant Baron Geoffrey and almost all the 6,000 standing militia, William gathered the 7,000 Praetorian Guards led by Baron Hubert, the 1,200 Guards led by Lieutenant Baron Andrew, the 5,000 Knights of Evreux led by Baron Agenitau, and the 3,000 Knights of Mortan led by Lieutenant Baron Ronald, a total of 16,000 men, and then recruited 8,000 men to transport baggage and led his army to Brionburg, the last fortress of Kay.

In order to prevent the local knights and nobles of Mortan from making trouble when he went on his expedition, William recruited all the local knights of the Earl of Moldan and the newly canonized knights and their followers, and formed a 3,000 Lords of Moldan including more than 400 knights, these knights were led by the old nobleman Vice-Baron Ronald, believing that he would not disappoint William's expectations.

Located twenty miles away from the city of Rouen on the west bank of the Seine, near the parish of Lisch, as a bridgehead to defend the city of Rouen, it was first built in the second monarch of the Duke of Normandy, Duke William the Longsword, after hundreds of years of continuous construction and reinforcement, its defense capacity can almost catch up with the Dukes of Normandy as the ducal palace of the Castle of Rouen.

Even though the tall, sturdy Fort Brignao was home to thousands of Cay rebels, William was confident that he could take it, relying on fifteen powerful counterweight trebuchets in his hands.

On his way through Lissy, William summoned Sir Rodrigo, who was stationed in Lissy, and canonized the hard-working general as the baron of Lissy, and was given thirty estates in Lisée as fiefs.

With the addition of the 3rd Janissary Regiment led by Rodrigo and a separate cavalry battalion of 500 men, William's forces swelled again.

"Rodrigo, I appoint you as the commander of the Second Legion of the Praetorian Guard, and use the Third Regiment of the Praetorian Guard and the Independent Cavalry Battalion in your hands as the skeleton to fill the recruits, and expand it into three infantry regiments, one cavalry regiment, and one engineer equipment battalion. As the commander of this legion, you will be the second general to take charge of the army in his own right, after Baron Hubert. William looked at Rodrigo, who was kneeling in front of William on one knee, helped him up, and said:

"After this battle, your second legion will be officially formed, don't live up to my expectations!"

"You won't be disappointed, His Highness William." Rodrigo replied solemnly by hammering the breastplate with his right hand.

Before William could leave Lysyracy with his army and march toward Fort Brionne, thirty miles away, the King of France's messenger sent a letter of mediation from His Majesty Henry I.

In the letter, Henry I claimed that in order to restore stability and tranquility to the Duchy of Normandy, he demanded that William immediately stop the civil war and sign an armistice in the area under his current control.

After receiving the mediation letter from Henry I, William read the letter at a glance, and took it into his arms with a blank face, as if he had never seen this letter before, and did not take Henry I's mediation seriously at all, but urged his army to step up the march, and directly led the army to the city of Brionneburg to surround it.

The Battle of the Wals Dunes three months earlier had spread throughout northwestern France, and even Aquitaine in southwestern France and the kingdom of Leon further afield had received news of the battle.

The two sides were evenly matched, but the result was a crushing defeat for the Kay side, with William's army almost unscathed, with only a few hundred men killed.

Such a disparity in victory shocked all the French nobility, so that they had to look sideways at William, the illegitimate son of the Duke of Normandy, and look up at William and him.

The most stimulated was King Henry I of France, who had seen the Normandy army led by the Duke of Robert a few years earlier, and the terrible fighting power of this army was still fresh in Henry I's memory.

When Henry I learned the details of the Battle of the Dunes of Vals, he almost thought that the terrible Norman army had returned, much to Henry I's concern.

An invincible Norman army was terrible enough, and if William really led this army to unify the whole of Normandy, then Normandy, as a huge principality adjacent to Paris, would be his greatest threat.

In order to stifle the threat in the cradle, Henry I not only sent a letter to William, urging him to stop the war with the rebellious nobles such as Kay, but also sent people to contact the two sides of Kay and the Duke of Anjou in an attempt to unite them against William.

Sixty-five-year-old Duke of Anjou, Fox III, the most powerful French prince, was a powerful duke with the title of 'Iron Hammer', and his son, seventeen-year-old Jofroy II, Count of Enman, also inherited his war talent and ambition, and coveted the chaotic Duchy of Normandy for a long time.

This time, with Henry I in the middle, with the help of the Count of Cay and others, the Duke of Anjou, Folks, was confident that he would swallow Normandy.

Just when Forkes, Duke of Anjou, and his only son, Jofrois, Count of Enman, began to prepare for war, King Henry I, who actively contacted the Duke of Anjou and the Count of Cay to fight against William, did not act again after sending a letter of mediation to William.

In the eyes of King Henry I of France, both the Duke of Anjou and the Duke of Normandy, these two powerful princes were the greatest threat to the Capet family's rule in France, and now that he had succeeded in provoking the confrontation between the Duke of Anjou and Normandy, it was enough for him, he only needed to stand on the side of the weak and let the two sides fight endlessly.

Interrupting William's process of unifying Normandy, draining the forces of both Normandy and Anjou, and preferably defeating both of them, was the result that Henry I wanted to see the most.

Two years ago, Henry I also regarded William as his nephew, but in less than two years, William became a thorn in Henry I's side, which had to make Henry I sigh that the world is impermanent.