When the cavalry corps formed by the cavalry of the Ninth Army of the Tang Army went to the grassland, it also officially set off the Northern War.

However, although the troops have been officially dispatched, the grassland is extremely wide, and the current confrontation between the two sides is cavalry, and the mobility is very high, so although small-scale battles have begun to break out, large-scale battles, if nothing else, they will really not be able to fight for a while.

Because unless both sides choose to fight, otherwise, if any side chooses to maneuver to avoid the battle, it will be difficult to fight.

Therefore, although four or five days have passed since going north to the grassland, Kang Changning's cavalry corps is still wandering in the steppe, occasionally sweeping away the Tatar tribes that have not had time to withdraw, and most of the time, they are still marching in a hurry, and their marching route is also a little erratic.

Because Kang Changning did not set any specific destination for himself, as long as he could contain the Tatars from staying away from the old site of Dongsheng City, then it would be fine.

So he will run to the Yulin Wei District for a while, and if he goes directly north for a while, he will go straight to Fengzhou, but halfway through, he suddenly turns around again, and it is very troublesome for Altan Khan to intercept him.

This also made Altan Khan regret a little, he had already known that he would have reorganized his army in advance, so that he could concentrate more troops, instead of only having more than 40,000 cavalry as it is now.

These more than 40,000 cavalry, although it is already a lot, but the cavalry that wants to outflank and encircle the southern barbarians is still not enough.

But if he can concentrate more than 100,000 cavalry, he Altan Khan will have more tactics to choose from, and when the time comes, he can divide his troops and outflank them in multiple ways, and no matter how those southern barbarians run, they will be blocked in the end.

It's a pity that the problem of insufficient troops will not change because of his regrets!

When Kang Changning took Altan Khan to go around in circles on the grassland, Deng Xide also led the army to leave the Great Wall, and the infantry marching speed was naturally not fast, but because it was marching on the flat grassland terrain, it would not be too slow.

It's a pity that Deng Xide's infantry is not strictly speaking to fight, but to cover the engineering troops and the people to build the city, so they can't leave on their own, and they have to keep the same speed as the people and a large number of baggage, otherwise, those people and the baggage troops will become a living target for the Tatars.

Don't look at the main cavalry force of the Tatars was attracted by Kang Changning, but Altan Khan was not stupid, he sent a small number of cavalry to continuously monitor the direction of the Great Wall, so when Deng Xide's main infantry went north, it would not take a few days for Altan Khan to get the news.

When Altan Khan learned the news, he would definitely take countermeasures, if his own preparations were not sufficient, the Tatars did not need to send many troops, and a few thousand cavalry came to contain him, which could cause great trouble to his main infantry.

Therefore, Deng Xide was still very cautious, and on the first day of the march only 15 kilometers, when he arrived at the place, the army set up camp, while the sappers and civilians built the city on the spot.

They're going to build an earthen fortress in a short time!

I have to say that 3,000 professional engineers and more than 10,000 people, plus the infantry unit also sent more than 20,000 people to help, and these 30,000 or 40,000 people worked together, and the speed of construction was quite fast.

They use cement directly in some key parts, while most of the building structures are made of local materials, earth, stone, etc.

It took only three days to build a fortress fortification that looked ugly, but could actually garrison nearly a thousand people and deploy artillery.

Yes, this earthen fortress, if it is a castle, is more like a field fortification, it is very simple, except for the necessary fortifications, there is basically nothing else, as for many border towns and cities will engage in tuntian and the like.

This is a very pure field fortification!

After the construction was completed, Deng Xide left nearly 1,000 people to garrison here, and then continued to advance with his troops.

His route forward is very clear, that is, all the way to the old site of Dongsheng City.

Each time, just go all the way and then stop to build the castle.

When Deng Xide built two castles in a row and was about to build the third one, Altan Khan finally discovered the conspiracy of these Tang Army.

Damn, they're not here to fight a decisive battle with us, they're going to build a castle and rebuild the Hetao defenses!

At first, Altan Khan thought that these southern barbarians would definitely go north, just like the army of the Central Plains Dynasty in ancient times, to find their Tatars, and then fight a decisive battle to expel them from the steppe through military strikes.

But now it seems that these southern barbarians did not intend to do so at all, and the cavalry they sent was not for battle, but to attract their own attention, so as to cover their infantry to build cities and establish defensive lines.

If they are allowed to repair all the way to Dongsheng City, no matter how vast the Fengzhou River and Hetao are in the future, I am afraid that there will be no way for them Tatars to live!

"Leave them alone, let's go south immediately and intercept their main infantry!" Altan Khan was also a decisive person, and after sensing that something was wrong, he immediately gave up the pursuit of the Tang Army cavalry in front, and chose to go south to intercept Deng Xide's infantry troops.

Altan Khan's cavalry came and went fast, and it was only one night's effort, and Kang Changning found that the Tatars who were following them no longer knew where to go.

And the most important thing is that these Tatars ran there, and he didn't even know it!

He had also run out of the scout cavalry to monitor the Tatars behind him, but it had to be said that most of the scout cavalry he sent out was not pleasing to the Tatars.

There is no way, even if the Tang cavalry has an advantage in many aspects now, it is still inferior to the Tatars in terms of individual combat ability and small-scale combat.

This is also the Tang Army's cavalry director Lu Yuzhi has repeatedly advised the cavalry generals to avoid skirmishes as much as possible when fighting the Tatars, especially cavalry engagements with less than 100 people.

Because the Tatars grew up on horseback from an early age, they were skilled in bows and horses, and they usually possessed good martial arts, and they were very good at fighting alone and small-scale guerrilla battles.

As for the Tang cavalry, many of them are peasants' children, and they have never even touched horses before joining the army.

Because the training and combat of the Tang cavalry paid more attention to unity and coordinated operations, and did not encourage and advocate the heroism of the cavalry, their signature tactic was the wall charge.

When the cavalry fights, pay strict attention to discipline, your horsemanship is average, sword skills are average, so good, don't expect to rely on your own horsemanship and knife skills to win battles, but rely on the ability of your comrades.

This also leads to a problem, that is, if your small cavalry unit encounters the same number of Tatar cavalry, it is often the Tang cavalry that loses.

But if the combat strength of the two sides rises to five hundred or even more, the victory of the Tang cavalry will be great.

If 10,000 Tang cavalry and 10,000 Tatar cavalry are fighting, Lu Yuzhi can pack a ticket, and his own cavalry can completely abuse the Tatar cavalry!

To put it simply, the operation of the Tang cavalry has certain requirements for troops, and small-scale cavalry operations cannot give full play to the unique advantages of the Tang cavalry.

This situation was alleviated to a certain extent after the Tang cavalry was equipped with a large number of firing pistols.

However, it is only a relief, and it does not say that the problem is fundamentally solved!

To completely solve this problem, you must have a large number of cavalrymen who have been professionally trained since childhood, have lived on horseback for more than ten years, and have strong personal martial arts.

It's a pity that there aren't too many such cavalry sources in the Tang Dynasty, but on the Tatar side, almost most of them are such cavalry.

Sometimes, Li Xuan also thought that he would simply follow the example of Qianming and recruit the tribes such as the Chahar Department and Duoyan Sanwei and let them use it for their own use.

But it's just thinking about it, Li Xuan didn't really do this, these tribes are too independent, you have to forcibly disassemble and integrate them, and after they are completely integrated, people will not want to, and in this way, these tribes that have lost their independence and nomadic characteristics and become farmers will be of little use to the Tang Dynasty.

But if it doesn't merge, then it's a time bomb, and maybe you'll have to do all kinds of co-optation.

And the Tang Empire never woos foreigners!

Therefore, Li Xuan would rather train a group of peasant children to become cavalry than directly recruit tribes such as the Chahar tribe and let them use them for his own use.

At most, it is to give them some support, let them contain and contain Altan Khan, and when Altan Khan is solved, they still have to clean them up.

In the entire East Asian region, Li Xuan did not allow the existence of other independent forces that could even be enemies of the Tang Dynasty.

In the past, the Li royal family of Goryeo had no actual threat, and it was not the same as Li Xuan, and now the Fusang Islands were also tossed by the Tang Dynasty, and the war was raging for many years, and it was becoming more and more intense, and the war not only caused a large number of military casualties, but also caused a large number of food production, and a large number of people were killed and injured.

According to observations by the authorities of Osumi Prefecture in Ryukyu Prefecture, the total population of Fuso has decreased by at least 10 percent over the past decade.

Moreover, because of the war, the reduction of grain production, and the decrease in population, these three points have already plunged the entire Fuso archipelago into a vicious circle, resulting in a smaller and smaller population.

The Osumi Prefecture authorities judged that if the war in the Fuso area continued, the total population of the Fuso Islands would be reduced by more than 20 percent within five years.

Ten years later, it is estimated that half of the population is gone!

In the report, the authorities of Osumi Prefecture proudly said that they did not spend a single soldier, and they did what the Yuan Dynasty could not do by selling ordnance!

And in the process, they also make a lot of money!

They even suggested that they could give a few titles to the arms dealers, and the actions of these arms dealers were comparable to the landing of 100,000 troops on the Fuso Islands!

For such meritorious subjects, even if you don't issue a knighthood, you can still send a few commendation documents!

Faced with such a proposal, Li Xuan naturally agreed!

Therefore, many maritime merchants engaged in Oriental trade today have obtained the title of patriotic merchants!

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