Near the battlefield were woods and barren hills, and the two armies lined up opposite each other on the Roman road of Deir, and as the drums and horns sounded, the cavalry array in the center of the English began to move, and the knights dismounted and raised their shields, holding their swords, spears and shields in their hands, their squires taking over the horses from the back row, and the Mercians guarding the baggage in the rear.

Earl Robert was not very surprised when he saw this scene, the English people he was familiar with had never formed cavalry, and these were obviously more elite mounted infantry in front of him, not to mention that their numbers were not many. On the orders of the count, six detachments of the first row of battle columns began to prepare for the charge. The English dismounted knights quickly formed their ranks, their spears diagonally raised, shields attached, and some squires in the back lined up ready to support the ironclad warriors in the front row with bows and slings. The Normans advanced slowly, and the dust kicked up by more than a hundred horsemen made them impossible for the English to see, and a few rounds of bows and stones did little damage to the knights, but the English knights remained unmoved. The enemy rushed out of the dust, the English aimed their spears at the faces of the enemy's horses, according to the instructions of the prince, all the weapons were polished to the cold light, the enemy cavalry almost rushed in front of them, but they were blocked in front of the full line of the English, the horses kept turning, but they were controlled by sharp blades, some of the approaching Norman knights were violently stabbed, and the English knights with swords came forward in both directions, one slashing the horse, the other attacking the knight, these warriors were very skillful in coordination, and when they attacked, they did not slash from top to bottom, Instead, he cut the veins in the necks of the poor horses with sharpened blades from the bottom up, and watched them fall to the ground, throwing the Norman knights on their backs from the saddle. The Norman knights who were attacked often watched as their sword-wielding wrists were slashed, but fortunately with the protection of their armour gauntlets, most of the knights were not mortally wounded, but they lost their ability to attack, and after the horses were wounded, they lost their balance and were quickly captured by the English, unloaded and guarded by the rear squires.

The dust cleared, the killing stopped, and Count Robert saw the fate of his knights, only a few lone horses scattered in front of the opposite formation, and his own knights who had been repulsed were running back. The Earl thought secretly: "Could it be that this is the Earl's guard of Northumbria, which seems to be stronger than Harold's elite." His face remained unchanged as he continued to give orders, and soon put the retreating knights back together. The earl was thinking about the next attack, but there was the sound of bull horns on the opposite side, and when he looked up, the infantry line in the center of the enemy suddenly opened, and these elite England took their horses from the squires behind them, and soon they were on horseback, and in the continuous sound of orders, a new cavalry line was re-formed.

Prince Edgar moved the cavalry squadrons on the left and right flanks together, and the cavalry of the three squadrons was fully deployed in front of the first line, and the squires continued to line up in the rear, serving as a platform for the knights to attack and defend, and they were ordered to protect and support the retreating and regrouping knights, while cooperating with the Mercian to guard the baggage. The Normans were puzzled by a series of actions on the other side, and whether these Englishmen were going to hedge against themselves on horseback.

Their suspicions were quickly confirmed, and all three squadrons of the English were lined up, with Count Volciov commanding on the left flank, Prince Edgar himself in the center, and Ulf, the Danish squire of the Earl of Benicia, on the right flank. This discovery made Count Robert breathe a sigh of relief instantly, the enemy was obviously dazed, abandoned the strong front, and wanted to engage in a horseback confrontation with himself, full of confidence in such a battle Normans, in the Wals Dunes, Wallaville and Hastings, these Norman knights are like a division of ghosts and gods, destroying the enemy positions countless times, when it is easy, they are extremely confident in their training organization and fighting skills, and they are not afraid to compete with any warrior immediately.

The first column of the regrouped began to charge again, and the Normans were accustomed to march by walking, avoiding trotting, as the latter was uncomfortable for the armored knights who used Takahashi's saddle and stirrups, which also meant that the horses were more likely to tire during trotting. In the final impact phase, the Norman knight will speed up to a cantering state. The knights of England were different, after Prince Edgar modified the harness based on the experience of later generations, the knights of England chose to gradually accelerate to trots and canters, and when it came to the sprint, the first row of knights entered the stride and the back row advanced at a jogging speed, in preparation to support the cavalry in the front row and join the offensive in the melee.

The scorching sun of the afternoon was a test for the knights on both sides, especially on such a dusty battlefield, where the knights' vision was affected by their armor and blurred by sweat, so they could only keep pushing forward. The Normans' battle line was not as wide as the English's, and the horses were slower, and when facing the oncoming enemy cavalry line, it began to look a little chaotic, and many knights and horses were under the pressure of the opponent's complete array and running momentum, and began to try to break away from their own detachments, and some knights who were not resolute enough fell behind the array, and when they realized this, many Normans began to retreat, and in this way, the first charge of the English successfully dispersed the enemy's entire battle column, The lone knights were attacked by the fangs of wild boars, some were knocked off their horses, and some were even pinned to the ground. Some of the spears of the English knight were broken in the impact, and he drew his sword and continued to charge in a neat formation towards the second line of Count Robert's column.

Edgar was at the front, he was the commander of the entire central squadron, constantly controlling the advance of the horses, and the prince bowed his armor and rushed into the opposite line of knights without hesitation. Count Robert was furious when he saw the knights in front of his side who were constantly fleeing towards the flanks, and immediately ordered all the detachments of the second battle column to follow him to counterattack the rebel cavalry. Their horses were still not fast, but they maintained a tight formation and launched a counterattack against the slightly loose English cavalry formation. The English Thanes kept their line and continued to march in the direction of the Normans' high-headed horses, the knights with spears and swords, pointing at the enemy in front of them. Some of the Norman knights raised their spears to stab them backhand, some held them under their armpits so that they could swing their charges, and some lay their spears on top of their right arms, holding them in a slow charge. The gunmen of England unanimously adopted the position of lying on their arms with their spears in preparation for the charge, but their skill did not seem to be as skilled as that of the Normans, and at the moment of contact, many of them did not stab the enemy, and the horses passed through the gap in the queue that the opponent had voluntarily dispersed, but the knights who charged with their swords stabbed the enemy with great precision with the skill they had practiced in training, and shot down the enemy one after another like a wind sweeping leaves. Some Normans were attacked many times, horses or knights were wounded in large numbers of noses and mouths, and many Norman knights whose formations were torn apart were shot down like bowling by passing Englishmen. Count Robert kept shouting for the remaining cavalry of his side that had spread out in the line and the opponent in close combat, the Normans tried to use the height and physical advantage of their horses to draw the English into the melee, the English, according to Prince Edgar's training requirements, ignored the individual enemy horsemen who tried to circle their horses to the flank, just brandished their long swords at high speed, and kept advancing, and the Theins struggled to re-establish contact among these already very scattered cavalry, and that's it, The English barely managed to maintain two loose lines of rapid advance, and the Norman knights, who had no chance to take advantage of it, soon broke up completely, the spurs on their feet kicked their horses fiercely, and they all galloped like bison, and many panicked and crashed into their rear columns.

Prince Edgar's helmet was struck by an enemy rider during the charge, and the lock ear guard on his left side was a little loose, but he still insisted on running at the front of the array with his sword in hand, shouting with all his might: "Teach them a lesson!" "The Normans saw this demon-like knight, like a god of heaven, kept fleeing, driven by a large group of Englishmen, Count Robert and the surviving warriors in the battle column became frightened deer in the wilderness, hunted in batches, the third column of Norman knights who watched this scene in the rear collapsed instantly, and the flight continued to spread in the ranks like a contagion, and the infantry in the rear of England watched in amazement as Prince Edgar with more than four hundred knights continued to drive nearly five hundred Normans, and the latter's horses soon became exhausted, The Englishmen had survived a few rounds of killings, but their horsepower remained relatively good, and their shoes and new harness showed good results. The Normans were driven to the banks of the Jor, and most of them were completely exhausted, and were driven to the water's edge by the English knights, and almost all but a few escaped the bridge.

It was getting late, and the prince's cavalry could even see York Castle as they walked to the side of Jor. A large number of captured Norman knights and horses were tied up by the English and brought back to the baggage camp, while the Earl of Northampton searched everywhere for Earl Robert, and due to the size of the battlefield and the difficulty of searching, some Norman captives claimed to have seen the Earl flee on his own after the collapse of the army, and then disappeared.