The ground of the river valley is mostly composed of sand and stones, because of the erosion of the water flow, it is relatively smooth, it is a naturally formed channel, and marching on such a ground, because of the proximity to the water source, has always been the first choice, the Tubo people are like this, and the Tang people who are pursuing behind are also the same.

Yang Yu's body fluctuated slightly as the horse's hooves fell, and his buttocks did not sit completely on the saddle, but left a gap about two fingers wide, all relying on the feet in the pedals, controlling the balance of the body, but after a while, he would sit firmly, allowing the body to relax a little.

Cavalry also needs physical strength, otherwise the bumps on horseback alone can make people miserable.

As the vanguard in the chasing army, he and the more than 50 horses behind him, all of them are equipped with one person and two horses, and the reserve horses behind him are not completely empty, carrying his weapons, supplies, utensils, etc., heavy cavalry and light cavalry pursuit, relying on horsepower, if there is no rotation, a horse can run away in just a few hours, and the national strength of the Tang Dynasty cannot afford to consume.

In this way, fifty horses and more than a hundred horses were running at a constant speed on the sandy and gravel ground of the river valley, and Yang Yu, who was the leader, was firmly staring ahead, following the footprints left by the Tubo people, chasing all the way, while estimating in his heart how far he was from the enemy.

In the end, the result of the military discussion was to follow Liu Ji's advice, and for the sake of insurance, all the light cavalry in General Feng Changqing was sent out.

Among them, with Yang He's Khotanese army as the main force, about 2,000 people, Liang Zai's defenders of Pahuan City still have nearly 500 light cavalry, and even his Jiedu envoy soldiers, if it were not for Duan Xiushi and others to stop it, they were also ready to send it out in one go.

How is that possible, in case something really happens, this is the only way to protect them from escaping, you know, in Hengluos, it is by relying on these tooth soldiers that Gao Xianzhi and the others did not fall into the hands of the big cannibals.

As for this main general, because Yang He is too old, he can only fall on Liang Zai's shoulders, Tian Zhenbu, as a striker, has already crossed the river, so naturally he will not go to fight with him, and this pioneer candidate, no one is more suitable than Yang Pre.

He had already traveled this road, and even if the Tubo people wanted to play any tricks, they couldn't escape a few key points, which was the information he got by sacrificing his life with Liu Ji.

Therefore, it seems that he is chasing with all his might, but in fact, he is holding his strength, and the speed of the horse has been controlled at a level that is not too fast, and can be braked in time, and the speed of his team leader is naturally the average speed of the whole team.

"Phew!"

Seeing that he was approaching an ambush point, he made a sound and gently reined the reins in his hand, leading the horse to slow down, and at the same time making a slow gesture, and the whole cavalry immediately centered on him and spread out into a semi-circular defensive formation to deal with possible enemy situations.

"Thirty steps ahead, go see if there is an ambush."

Yang Yu pointed ahead and commanded, two cavalry responded to the order, one in front of the other, five steps apart, this is a standard reconnaissance formation, if the cavalry in front is attacked, the back will be blocked by his body, so as to win a chance to escape.

It was a mountain recess, the mountains in this area were relatively steep, and there were not many places to ambush a large group of people and horses, Yang Pre had already memorized them one by one when he was on the way back, and his eyes did not follow the two cavalrymen at this time, but swirled on the ground.

The sandy and gravel ground of the river valley is easy to leave imprints, and an excellent scout can judge the approximate passing time of the enemy army according to the depth of the imprints and the freshness of the soil.

This is extremely unusual, when the Tubo people retreated, their chain bridge had not yet been erected, and it took about two hours to build the bridge, plus so many people and horses, crowded on a bridge deck that was only two steps wide, how could the speed not be fast, this is more than an hour, three hours apart, that is, most of the day, why now it seems that the Tubo people have not gone far?

Unless they're baiting the enemy!

Yang Yu began to understand Liu Ji's previous judgment, the other party didn't think about defending Poyi River at all, or rather, the battle that took place there was just to give the Tang people an illusion that they were going to defend to the death.

His heart was a little uneasy, and he turned to one of his subordinates and asked, "How far is the rear team?" ”

"I said it was five miles."

"You go and tell Ma Lao Er that the distance should not exceed three miles, and so is the rear army, and there is no one to take care of it when it is urgent, so let him be the one who chooses the front."

The subordinates did not hesitate to turn the horse's head, their team went out too far, and the friendly troops behind were separated by five miles, led by the general of the Chinese army, the commander of Diezhou, the right Jin Wu Weilang general Ma Lan, it was not a system, Yang had such worries, it was not unusual.

Soon, the search ahead had results, and there were no ambushes.

After hearing their return, Yang Yu once again made a forward gesture, and the fifty cavalry did not rush up, but pulled out a long queue, and the dense and tight sound of horses' hooves echoed in the valley and mountains and forests for a while, startling the birds to scatter.

In fact, Xi Dongzan was in front of them, no more than half an hour away, and in front of the Tubo cavalry, there was a group of routs in chaos, originally numbering three thousand, mainly local light foot soldiers, who left more than 700 corpses in the battle on the river bank, and the remaining fifteen or six hundred, all of them were running away like a lifeless at this time, and a large part of the imprints that Yang Yu saw in the river valley were all left by them.

Xi Dongzan did not immediately rein in them, just to give the Tang army an illusion and make them think that there was a cheap one to pick up, after all, chasing and killing the defeated enemy was the least costly, but the result was the greatest, and the Tang people had no reason to give up.

As a result, the Tang did not give up, and the pursuers followed them almost as soon as they crossed the bridge, and from more than an hour when he began to retreat with his men, he chased for less than half an hour, and saw that he was about to turn from the Indus Valley to the Sgar Valley, but he did not have much sense of success.

The reason is very simple, these Tang people were too careful and barely let go of any possible hiding points, which means something, it shows that they are no stranger to the terrain, which makes Xi Dongzan can't help but think of the two spies who escaped from He Bolao City.

What a mistake, and there are endless disasters.

A team of fifty people, hundreds of steps back and forth, even if they were ambushed, they couldn't leave a few people, did the Tang people get used to doing this, or did they notice something? Xi Dongzan looked at the confluence of the two rivers, which was a triangular open field, and his heart was a little uncertain.

He really wanted to fight a battle, to boost his somewhat low morale, and let his subordinates understand that these Tang people were no different from those on the edge of Dafeichuan, Jishi Mountain, and Qinghai decades ago, but the premise of doing so was that they must be left behind, so that the enemy could not judge his intentions, and not startle the snake.

These Tang people really have a problem, at the moment, they don't even know how many people are behind these fifty people, how far away they are, will the enemy be the same bait?

After thinking about it again and again, I still gave up this idea, the terrain in this area is a straight passage, the left and right sides are rivers and the other side is the mountain wall, there is no room for outflanking, it is a good place to fight and block, but it is just a fight for consumption, which is not taken by the wise.

Then there was only one place left, the city of Ho Bolao.