Today's Fuso is the same as the Central Plains in various periods of war.

During almost all wars and turmoil periods such as the Spring and Autumn Period of China, the Warring States Period, the Five Kingdoms and the Ten Dynasties, the end of the Song Dynasty and the end of the Yuan Dynasty, the population of the Central Plains will be greatly reduced.

Finally, when the new unified dynasty is established, it will be in a situation of population and land, which will indirectly alleviate the problem of land annexation.

Nowadays, this situation has also appeared on the Fusang Islands, and the efforts of those arms merchants in the Tang Dynasty are inseparable.

Not for anything else, especially not as many people speculate, this is a deliberate act of the Datang official, purely because selling anything to Fusang these days is not as profitable as selling weapons.

In order to raise enough funds to buy weapons from the Tang Dynasty, the daimyos from all walks of life also showed their powers, and the simplest ones with gold and silver mines at home directly let a large number of people in the jurisdiction go to mining, there are no gold and silver mines, but there are other specialties are also as much as possible to get all kinds of specialties.

If the family is poor, then you can only fight to support the war, and if you have no money in your family, you will rob it.

In this process, the merchants of the Tang Empire made a lot of money in the field of arms exports, and the stimulation of money also made them pay more attention to maintaining the arms market on the Fusang Islands!

How to maintain?

Selling to the owner and then to the west is already a very old-fashioned method, not new, sometimes, they will even give away some weapons on credit, or even give away some weapons for free, and at the same time will limit the number of weapons purchased by some powerful daimyos, in order to prevent the powerful daimyo from swallowing up those weak daimyo at once, and then unify the Fuso Islands.

A Fuso with hundreds of independent and fighting each other is a good Fusang, and it can contribute a steady stream of money to them, and a unified Fuso is not a good Fusang.

These many arms dealers have the consciousness that they have even set up an unofficial Fuso Arms Export Guild under the leadership of some powerful arms dealers, and they have uniformly formulated the arms export policy for Fuso and coordinated the interests of various arms dealers.

It has only one goal, to maintain and even expand the arms market in the Fuso region!

Osumi Prefecture has become the frontier base of the Tang Empire's arms exports to Fuso, and a large number of Fuso daimyo will come to order all kinds of weapons, from plate armor, swords, to arquebuses, and light artillery.

In addition, Tsushima is also developing in this direction!

Tsushima Island, this area was an area that did not have an obvious affiliation before, the Goryeo Li Dynasty had a certain control over this area, and Fuso also had a certain control over this area, and the daimyo on Tsushima Island were also friendly with both sides, and no one could be offended.

However, this situation was changed after the Tang Dynasty took control of the Goryeo Peninsula, because the Tang Dynasty directly announced that since Tsushima Island belonged to the Li Dynasty on the Goryeo Peninsula before, it naturally belongs to the Tang Dynasty now.

Therefore, when attacking the Goryeo Peninsula that year, he also sent hundreds of marines to land on Tsushima Island, directly killed the daimyo on the island, and then immigrated some people.

Now this place belongs to the territory of the Tang Empire, and it is also the kind of mainland, not the model of overseas direct jurisdiction, Tsushima Island, now Shima County, and it belongs to Nanjiang Prefecture in Liaodong Province.

Because of the proximity, this place naturally became the frontier port of the Tang Empire's trade with Fusang, but on the whole, the development was relatively limited, and the development was far less good than that of Dayu County.

For the arms trade in the Fuso region, the arms dealers of the Tang Empire usually provided door-to-door delivery, cash on delivery and other services to ensure that their customers could get their hands on weapons and not be intercepted by other hostile daimyos.

The premise was that the daimyo were able to bring out gold and silver, or other goods that could be exchanged for them.

The Goryeo Peninsula, the Fuso Islands, and even the regions of the South Seas can see some signs of the Tang Empire's policy in East Asia, that is, the existence of other powerful powers is not allowed.

If it is possible, the Tang Empire will directly annex it, if it cannot be directly annexed for a while, then it will use various means to carry out actual control, and if it is not possible to implement control, then it will use various means to control indirectly.

For the Chahar tribes, Duoyan Sanwei and other tribes, the policy adopted by the Tang Dynasty is similar, and now it is support, and then control them through ordnance trade, economic trade and other means, and when the time is ripe, it will naturally be completely annexed.

However, as a result, the Tang Empire was unable to directly recruit these herdsmen to serve in the army and expand the cavalry force for the time being.

It's just that Li Xuan doesn't care, anyway, the army building strategy of the Tang Empire, whether it is the army or the navy, does not pay attention to individual heroism, but to teamwork.

Nowadays, this kind of army building strategy in the grassland, in fact, it has also encountered some troubles, for example, in small-scale conflicts, it is difficult for the cavalry of the Tang Army to take any advantage, and sometimes even suffer.

The most obvious manifestation is the reconnaissance of both sides.

The reconnaissance cavalry sent out by the Datang Army, if it is intercepted by the enemy, in most cases it will choose to take the initiative to retreat, there is no way, you can't fight alone, what can you do if you don't run.

If the Tatar scouts came over, the Tang Army often needed to choose to send a larger number of cavalry to intercept it, because if it sent less, it would be a great loss to give people heads.

The reconnaissance cavalry sent out by Kang Changning yesterday was fiercely intercepted by the Tatars, and the reconnaissance cavalry troops chose to retreat in the evening in order to avoid indifferent losses, but they did not expect that these Tatars chose to retreat overnight.

By daybreak the next day, they found that the Tatars, who had been following the butts more than twenty kilometers away, had run away.

Where did they go?

Kang Changning only thought for a moment, and then made his own judgment, these Tatars were very likely to go south and then intercept General Deng's main infantry.

Because of the calculation of the time, it is estimated that Deng Xide's troops will attack for ten days, and it is impossible for the Tatars not to know this news, and when the Tatars know the news, judge the strategic intentions of Deng Xide's troops, and then make a relative response, it is estimated that it will be about this time.

After thinking of this, Kang Changning did not hesitate, and directly led his troops to continue to turn around!

He was running from east to west, originally to attract Altan Khan's attention, and wanted to indirectly cover Deng Xide's troops, but now Altan Khan has chosen to go south, which shows that this indirect cover is no longer feasible, and the next thing is to cover directly.

After all, Deng Xide's troops are all infantry, although there are 2,000 divisional cavalry and a light cavalry regiment, but this divisional cavalry and a light cavalry regiment are no different from no in front of more than 40,000 Tatar cavalry.

Therefore, he had to lead the cavalry to return as soon as possible, acting as the flank of Deng Xide's department and covering the infantry.

When Kang Changning ordered the troops to return south, there was a very strange situation on the grassland, before the Tatars were still chasing Kang Changning's cavalry corps, but now it has become Kang Changning's cavalry corps chasing the Tatars.

It's unclear who is chasing whom.

Deng Xide, who was leading the army to build the third earthen fortress, soon learned the information that the Tatars were moving south.

Although the number of cavalry under his command is not large, most of them are scattered by him as scouts, although this grassland is large, but the range of activities of the cavalry is also large.

As soon as the reconnaissance cavalry on the periphery found that the Tatars were moving south, they immediately rushed south, and then reported the news to Deng Xide as soon as possible.

The Tatars are coming!

This was not unexpected, and he took more than 60,000 people to the north, and he did not expect to hide from the Tatars at all, and he did not even need to hide from them.

Because the core strategy of the Ninth Army is to use the main infantry force as a magnet to attract enemy cavalry to gather, and then look for opportunities to kill and injure them in large numbers.

If these Tatars don't run over, they just run away, and he will be disappointed.

Immediately, the order was passed down.

What to do, what to do!

Because I had already expected this situation before, I already had a complete plan, and there was no need to make any additional preparations.

Immediately, the combat units of the two main infantry divisions, that is, the infantry and artillery units, were preparing for battle on the periphery, while the baggage and other troops remained inside, and the engineers and the civilians continued to build.

If the enemy does attack, this war will have no effect on them.

In order to protect against cavalry attacks, a large number of four-wheeled carriages that transported baggage were also put to use, directly serving as fortifications on the perimeter.

No matter how awesome those cavalry were, it was impossible for them to rush up directly across a large number of carriages!

The only thing that is more troublesome is the logistical supply, but the problem is not too big!

Deng Xide's troops are enough, and this place is not far from the Great Wall, only more than 40 kilometers, just send a large number of troops to escort the baggage, if those Tatars send cavalry to attack, the big deal is to fight defensive operations on the spot.

In any case, the infantry of the Tang Dynasty faced the cavalry of the Tatars, and they did not suffer losses in defensive battles, and they all earned one for one.

Deng Xide was unmoved, Altan Khan naturally would not be polite, he led 40,000 cavalry all the way south, and soon found Deng Xide's troops, and then stopped about five kilometers away.

A distance of five kilometers is enough for a large army to walk for most of the day if it is in a mountainous area or other places, but in such a plain area, even for the infantry, that is, an hour of rapid marching time, it is even less for the cavalry.

The 40,000 Tatar cavalry stopped five kilometers away, while Deng Xide's infantry was on standby.

In this case, a large-scale battle can break out at any time!

However, in reality, no!

On the one hand, Altan Khan knew that these infantry were not easy to deal with, and his own cavalry took the initiative to kill them, and it was definitely their cavalry who suffered, not to mention, Altan Khan also knew that he was chasing a Tang cavalry of more than 10,000 horsemen behind his ass.

No matter how stupid he is, Altan Khan will not launch an attack stupidly at this time!

Attacking head-on, that was the act of a stupid fork, Altan Khan was not stupid, so he chose to divide his troops to attack the grain road!