William decided to help Malcolm reclaim the throne, but not for free. Queen Bamburgh and the House of Dunkeld agreed that once Malcolm regained the Scottish throne, he must cede to William the four counties of Cumberland, Lothian, Dunbar, and Tweotdale, near Northumberland.

At the same time, William also demanded that after Prince Malcolm regained the throne, the Kingdom of Scotland should submit to him and respect the Kingdom of England and the Norman Kingdom as suzerain.

William's claim to Prince Malcolm for these four counties was justified, first of all, the Earldom of Cumberland was the de jure territory of the Duke of Northumbria, and William had the right to retake Cumberland on this ground.

The three counties of Lothian, Dunbar, and Treviotdale were once the territories of the Kingdom of Northumbria, which was part of the Seven Kingdoms of England in history.

Since the Kingdom of Northumbria was part of the Kingdom of England, it made sense for William to claim the three counties on this ground.

Northumbria, an Anglo-Saxon kingdom founded by the Angles, was originally made up of two separate small kingdoms bounded by the River Diss.

One of these small independent kingdoms was Bernesia, which encompassed present-day East Scotland, Berwick in England, Roxburgh, East Northumbria, and Durham.

Another small independent kingdom was Deira, which encompassed the northern and eastern parts of present-day Yorkshire, England, both of which were founded by the Angles around 500 AD.

Some of the scarce surviving sources record that in the middle of the 6th century, the king of Bernesia was Edda, and the king of Dela was Eri (or Ele).

King Etralfrith of Bernesia (r. 593–616) merged the two minor kingdoms into the Kingdom of Northumbria, adding Scotland and Welsh territories to the unified kingdom, although Ettelfrit was defeated by Edwin of Dera and replaced.

Edwin embraced Christianity in 627 and established Northumbria supremacy in England, but in 632 Edwin was killed by King Cadwalon of Gwynids in Wales, who had allied himself with King Penda of Mercia against Northumbria.

After a year of chaos, the throne of Northumbria was taken by Oswald of Bernesia, who brought in St. Edan to carry out Celtic Christian missionary work, although Oswald was also killed by Penda of Mercia.

Oswald succeeded Ossious (r. 641-670) and Ecgriffith (r. 670-685), during which Northumbria's power declined, while the kingdom of Mercia flourished.

However, Ossio was religious, and he established the leadership of the Celtic Christian Church in Rome at the Whitby Synod.

In the late 7th and 8th centuries, the Kingdom of Northumbria was politically at odds, quarrels, and discord, but the kingdom's church, art, scholarship, and literature were in a golden age.

In 867, the invading Danes won a victory in York, the capital of the Kingdom of Northumbria, and they occupied the southern part of the kingdom, and the Anglos of Northumbria were only able to control a small kingdom north of the River Diss and south of the Bay of Forth.

After the conquest of England by Danish Cnut the Great, Danish counts were appointed in Northumbria, and among these Danish counts, Sword, who died in 1055, was the most powerful.

However, in 1065 the Northumbrians banished Sword's heir, Tostig, who was replaced by Mokal, brother of Edwin, Earl of Mercia, and in 1066, accompanied by Harald of Norway, returned to Northumbria and defeated Mokal and Edwin at the Battle of Fulford.

At this time, Harold II, who had just taken the throne of England, quickly rushed north and defeated Tostig and Harald.

However, with the praying mantis catching cicadas and the yellow finch behind, William, Duke of Normandy, seized on Harold's weakness of fighting back and forth, defeating Harold at Hastings in the south of England, ending the Anglo-Saxon era.

Now that William had seized the Kingdom of England twenty years earlier, the Duke of Northumbria was no longer Tostig of the House of Godwin. Godwin and Mocal of Mercia, but colluded with King MacPace of Scotland to rebel against William's Ossoff. Bamburgh.

Want to come to Ossov. Bamburgh colluded with MacPace, the widow of King Duncan, and Elfred did not take her two sons to the same family's nephew, Duke Ossoff. The important reason for Bamburgh.

William intended to send a force of mercenaries to help Malcolm and his enemy, King MacPace of Scotland, in his confrontation.

However, this mercenary army was not very numerous, including two hundred Norman knights as the mainstay, hundreds of Norman warriors, standing army soldiers and adventurers, and five thousand mercenaries recruited from William's domain.

Since Prince Malcolm was still young, he was only 11 years old, and William decided to send Ferdinand, Earl of Lancaster. As the commander of this army, Grylls was also the regent of Malcolm, and once Malcolm regained the Scottish throne, William could gradually Normanize the Scottish kingdom to facilitate his future conquest of Scotland.

This army of up to six thousand men was to be drawn from Malcolm II, Duke of Strathclyde. The port landing of the county of Galloway, the domain of Suradacred, threatens the army of King MacPace of Scotland from the flank.

William chose to land here because the Duke of Strathclyde was once a follower of King Duncan, had conspired against the usurper MacPace, and he was also one of Prince Malcolm and one of the supporters of the Dunkeld family.

With an army of 6,000 landing at Galloway, and with the help of the Duke of Strathclyde, William believed that even if Prince Malcolm did not regain the throne, he would be able to gain a foothold in southern Scotland, forming a north-south confrontation with King MacPace of Scotland.

Such a situation is what William wants to see the most, because now William has no spare energy to annex the Kingdom of Scotland.

The Normans, who had just conquered the Kingdom of England, had not yet fully digested the vast kingdom of England, and there were still many rebels lurking in it, and William must not be careful.

Even though William brutally intimidated the English and killed most of the rebels who dared to rebel against him, he believed that if he and the Normans showed fatigue and stalemate with the army of the Kingdom of Socrates, the Kingdom of England would surely revolt in a large-scale rebellion.

Therefore, William intended to use Prince Malcolm to create a rebellion within the Kingdom of Scotland at the lowest cost, rather than risk a rebellion at home to send troops to the Kingdom of Scotland.

In case Prince Malcolm did regain the Scottish throne, William also thought of a countermeasure, and he decided to remove Prince Malcolm's younger brother, Donald Brown. Prince Dunkeld remained at the court of England.

If Malcolm regains the throne, his brother Donald will be William's counterbalance.

As long as Malcolm has any disobedience, William can repeat his old tricks and support Prince Donald's seizure of Scotland, causing the Kingdom of Scotland to rebel.

Taking advantage of this opportunity, William was in time to annex the Kingdom of Scotland.