Hearing that he was ordered back to Chang'an, Li Daoyan did not feel surprised, but breathed a heavy sigh of relief, as if he was relieved.

"General Lee, what happened? Do you need our help? Su Dingfang asked with some puzzlement.

Li Daoyan himself has no problems, at least for now, he is also an honest and loyal general on Tuyuhun's side, and Su Dingfang is also very relieved of him.

But the flying pigeon means that this is not a small matter.

Even if it is a military situation, unless it is particularly urgent, like the military report sent back to Chang'an last time, that is, the one about guerrilla warfare, it is not qualified to use the flying pigeon to pass the book.

Although the flying pigeon is fast, it is somewhat unstable, and occasionally it will be lost, and only the kind of urgent things will use this channel.

On the occasion of the war, a front-line general was sent back to Chang'an, and anyone with a discerning eye knew that something must have happened?

"Huh......" Li Daoyan exhaled, looking a little sad and said: "It's not a secret, the old man received a letter from home a few days ago, and his father is in poor health, and now it seems that he is afraid that it will be ......."

Li Daoyan didn't continue, but everyone understood what was happening.

Even the iron-blooded and ruthless Wang Xuance couldn't help but sigh in his heart, since ancient times, loyalty and filial piety have been difficult to achieve!

Li Daoyan was born in a clan, and his father was Li Shentong, the king of Huai'an County, and was Li Yuan's cousin.

And when Taiyuan was too far away, all the Li Tang clans, only Li Shentong responded outside.

After the establishment of the Tang Dynasty, Li Shentong was named Zheng Guogong, and soon changed his title to the king of Yongkang County, and then changed to the king of Huai'an County.

When attacking Dou Jiande, Liu Heimin and other warlords, Li Shentong was the vanguard, and in the first year of Zhenguan, he worshiped the three divisions of Kaifu Yi and gave 500 households.

When Tang Taizong transferred the county kings of the clan to be county dukes, only Li Shentong did not surrender to the county dukes, and still retained the title of the county king of Huai'an.

In addition to his loyalty to the Tang Dynasty, Li Shentong's merits are also full.

It's just that he didn't expect that a generation of famous generals would come to an end, and when he left, his eldest son Li Daoyan was still outside to fight for the country, and even received the news in advance, and he didn't go back to see the last one.

Li Yuanji didn't like the clan, because when he was in trouble, no one in the clan stood up to speak for him.

So for the clan, Li Yuanji rarely moved, and he didn't even know the news that Li Shentong had died.

As early as a few months ago, the Li family sent someone to Tubo to bring the family letter to Li Daoyan, but a few months have passed, Li Daoyan still has not returned, and the Li family wanted to wait a little longer, but this wait was over, so they waited until Li Shentong breathed.

As a last resort, the Li family could only find Li Yuan and tell him the news of Li Shentong's death.

And Li Shentong's death naturally caused a lot of sensation in the government and the opposition, after all, it was a generation of famous generals, famous ministers, and clansmen, and the news reached Li Yuanji's ears.

Although they are not enthusiastic about the clan, they are the clan after all, they are sorry for themselves, but they are right about the Tang Dynasty.

After learning that Li Daoyan had already known the news, but had no intention of coming back, and did not even mention it, Li Yuanji asked the secret guard to send a flying pigeon summons, directly urging him to come back.

Since ancient times, loyalty and filial piety have been difficult to achieve, and in the face of filial piety, loyalty can only go to the back row.

Of course, the premise is that if someone is available, if no one is available, then Li Daoyan can only continue to be in front.

There were people available in front of him, and Li Yuanji didn't want to bear some unnecessary infamy, so he still edicted him.

After receiving the edict, Li Daoyan was no longer as calm as before, the tears on his face instantly washed his entire face, and with a military information written by Su Dingfang in a hurry, under the escort of dozens of guards, he galloped all the way to the east.

……

"Hey......" Looking at Li Daoyan, who almost fell off his horse, Su Dingfang and the others sighed helplessly.

Some blame, but also some self-blame.

I should have discovered this situation a long time ago, because Li Daoyan's performance has been a little abnormal compared to before.

But Li Daoyan should also tell this matter, after all, they are not gods, it is impossible to see everything, and there will always be a time when they are lost.

Due to various reasons, Li Daoyan was unable to see his father for the last time.

Even if he returns to Chang'an quickly, but when he arrives in Chang'an, he can only sit in front of his father's grave and cry with his head in front of his head.

"I feel a little aggrieved when I think about it, Huai'an Wang Rongma has made great achievements for the Tang Dynasty all his life, but his son is not by his side when he leaves, it is very desolate!" Zhang Liang shook his head, as if he was motivated by feelings, but he couldn't blame others for this.

Li Daoyan is the eldest son, the eldest son is everything, and if the eldest son is not there, this matter is not complete.

"Everyone, then let's work harder, after taking Tubo, there will only be one enemy left in the Tang Dynasty, even if it is to prevent such a thing from happening in the future, we must take Tubo as soon as possible." Su Dingfang sighed and encouraged.

"Yes, after taking Tubo, Tuyuhun will naturally be completely finished, and there is only one Western Turk left in the entire west and south, but the strength of the Western Turk is not strong, and it is difficult to become our opponent, I just hope that we can recuperate for a few years after this time!" Gao Zhensheng said with feelings.

Needless to say, I also know who the last enemy Su Dingfang said was, this enemy that almost everyone in the world knows.

Goguryeo.

This country is not strong, or even very weak, but with its unique geographical advantages, it has stubbornly borne the three eastern crusades of the Sui Dynasty, and even the final demise of the Sui Dynasty has a lot to do with Goguryeo.

The three crusades consumed too much of the Sui Dynasty's national strength, and finally caused the resentment of the entire Sui Dynasty, and the powerful Sui Dynasty collapsed in an instant in just a few decades.

Therefore, the Tang Dynasty's crusade against Goguryeo, no one thought it would happen, but they didn't think it would happen so soon.

It's just that now, with the improvement of the Tang Dynasty's military strength, economic recovery, and successive victories, if an opponent like Tubo can be defeated, then what are the problems in capturing Goguryeo?

"Ladies and gentlemen, whatever your task is this time? Can you go to the front line to kill the enemy and make meritorious contributions, everyone, our 170,000 soldiers, share this merit equally! Su Dingfang finally said that although it would cause dissatisfaction among the front-line soldiers, if they didn't do so, the soldiers who stayed in the rear would be even more dissatisfied.

However, in addition to this method, Su Dingfang also has a way: "In addition, General Zhang's side is ready for rotation, if the front line is hard, the commander will pick some people to come back for rotation." ”

The rotation system is inspired by the rotation system of generals, so that everyone has no complaints, everyone has the opportunity to go to the front, as for the time, what does it matter if there is more or less?

……

In the following ten days, the Tang army in Tuyuhun was even more frequently mobilized, sometimes repeating it back and forth several times a day.

It wasn't until the end that it gradually stabilized.

And those who have a heart found a surprise, the Tang army was shrinking, and under the premise of occupying an absolute advantage, it actually contracted.

Although the strength of each unit has increased, the thousand-strong squad that has wandered outside has disappeared.

Instead, there are barracks, and if you look down from the sky, these barracks are connected in a straight line, and at the other end of the line, a larger army is gathered.

Zhang Liang's headquarters, Hou Junji's headquarters, Li Daoyan's headquarters, plus the 10,000 people allocated by Su Dingfang, a full 70,000 people are under Zhang Liang's command.

Because they took over the escort task, these troops were saved, and the 50,000 troops were divided into a battalion of 3,000 people, each battalion was fifty miles apart, and twelve barracks were spread over a corridor six hundred miles long, and every one hundred and fifty miles, an additional battalion was added, that is, three thousand, three thousand, six thousand, three thousand, three thousand, six thousand, and so on.

This is enough to ensure that if there is a problem at any point, the other place can quickly provide support.

And Zhang Liang is in charge of the Chinese army and personally coordinates the overall situation.

The advantage of this is that Su Dingfang can take an army of 100,000 people south into the territory of Tubo, which is much more than previously thought, even if there is no support, as long as the logistics can keep up, it is not difficult for these 100,000 people to destroy Tubo.

After the fifteenth day.

After a few days of rest, reorganization, and replenishment after the transfer of troops, the troops are now rejuvenated again, and people can perceive a strong fighting spirit from a distance.

Of course, no one could detect this fighting spirit.

Because this is no man's land.

Yes, in Tuyuhun, in Tubo, there are no man's lands everywhere, not that they are not suitable for survival, but there are really not so many people, and over time, some places can only be abandoned and become the homes of many wild beasts.

But in the face of the powerful war machine, these terrifying beasts are vulnerable, and the weak are very pitiful.

Su Dingfang learned from Li Jing's model, abandoned those large carriages, and used the captured war horses, horses, cattle, and the like to transport supplies.

Part of the army is for its own use, and part of it is reserved for logistics.

The place where they stepped on it would become a huge granary, and all the supplies and equipment would be transported here in a steady stream, and then escorted to the front line by the main baggage team of 20,000 people.

At this point, Su Dingfang has completely solved the trouble, and he can finally free his hands and ruthlessly clean up the Tubo people who dare to stumble on himself in secret, as well as those mysterious Han people.

Although I don't know why, I don't know who they are, but this does not hinder my anger, and those who dare to be enemies of the Tang Dynasty will be torn apart, ruthlessly, and torn apart by the brave and invincible Tang Army.