Li Shiji took Liaodong City for twenty days, and with the latest herald entering Liaodong City, the last city on the entire Liaohe River, Jian'an City, surrendered after the city gate was blown up, which meant that the entire Liaohe River was all in the hands of the Tang Dynasty.

As these cities continued to be taken, the people around these cities were quickly arranged to return to the villages to cultivate the fields. The national reserve granary from Youzhou is constantly transporting grain and other materials to the entire eastern Liaoning region through the Yellow River→ Bohai Sea → Liaohe River.

For Tangshan City, which was built in Youju to face the Goryeo front, the materials transported here were nothing at all. Because the entire city of Tangshan is now regarded as the industrial center of the entire Youzhou and even the north, the steel mills and related processing industries built here will supply the entire northern region for a considerable period of time in the future.

However, according to the information given by His Royal Highness, there are also a large number of coal, iron ore and other resources near Gaimu City (Fushun), and now Li Shiji no longer cares about any farmland or the like, in Li Shiji's view, these mineral resources are the key.

It's just that no one has found out.

It took only more than 20 days to take a total of more than 20 cities of different sizes on the front line of Liaodong, although this is related to the fact that most of the cities, especially some small cities such as county seats, surrendered directly after the arrival of the Tang Dynasty army, and Sun Daiyin surrendered directly after their arrival, without any resistance.

But it's also fast enough.

In addition to transmitting the latest news to His Majesty in Chang'an and His Royal Highness the King of Qin, Li Shiji had to admit that His Royal Highness the Crown Prince's opinion had a decisive impact.

The 20,000 cavalry scattered between the Yalu River and the Liaodong front cut off almost all the information transmission of Goguryeo, so that they may not know the real situation of the Liaodong front until now.

According to the information received by Li Shiji, during these 20 days, Goguryeo once sent 10,000 cavalry to try to clear it, or it was a tentative attack.

But after the 20,000 heavy cavalry quickly dispersed into dozens of squads and did not make contact with the other party, the other party pursued a distance and retreated on its own.

When the opponent retreated, the cavalry troops, which were already fishing from a distance, quickly re-followed the opponent and continued to harass the opponent with bows and arrows.

The strong bows and arrows of the Tang Dynasty played a decisive role in such harassment, and the armor of Goguryeo was originally iron sheets, and although their war horses also increased their armor, the armor pieces of their war horses were thinner.

As a result, the arrows fired by the Tang Dynasty caused certain casualties to the heavy cavalry troops of Goguryeo.

And when the other party turned around and pursued, Datang's cavalry troops ran while shooting.

Anyway, for Datang, the loss of these arrows is the same, even if they are all iron arrows.

Although the burden of war horses in the Tang Dynasty was very heavy, the heavy cavalry sent by Goguryeo was also a heavy cavalry, and the heavy cavalry of Goguryeo was heavier than the burden of the Tang Dynasty.

I can't run fast, you can't run fast, then we're all the same, there's no difference.

As for the light cavalry that came out with the opponent's heavy cavalry, the commander of the other side obviously used these light cavalry as scouts to reconnoiter and transmit information, and in this tug-of-war, the other party did not dare to send them.

Even the heavy cavalry can't carry the opponent's armor-piercing arrows, and you let the light cavalry in leather armor go?

What's more, they haven't forgotten that there are nearly 20,000 heavy cavalry active here in the Tang Dynasty! And the total number of them is only 10,000, although there are only thousands in front of them, who knows if the rest are outflanked.

So after tugging back and forth twice, the cavalry generals of Goguryeo retreated decisively, even if the Tang cavalry pursued and harassed them in the back, they did not care about retreating directly.

In fact, they did expect something, and the three of them were going to try to see if they could eat the 10,000 cavalry if they could gather 20,000 cavalry.

But it's easy to disperse, and it takes time to gather, and the other party didn't give too much time, but let the other party slip away.

But it didn't matter if they slipped away, because even if they did, they would have left nearly 700 casualties back and forth.

Among them, more than 400 died, and the remaining more than 300 wounded, Qibi He Li directly asked people to be sent to Liaodong City after simple rescue.

They ran in a hurry, and they didn't even collect much of the iron arrows shot by Datang.

After this battle, the various scouts that the other side tried to send out were all stopped by the cavalry on this side.

Especially when Qibi He Li fought against this Goguryeo cavalry, Li Shiji's side had actually completely taken Liaodong City and launched a governance operation, and after a large number of troops were vacant, most of the army of the Tang Dynasty had crossed the Liaodong line through Liaodong City and arrived at the rear of Qibi He Li and their cavalry.

Giving the support of this side, Li Shiji directly supplemented the three thousand light cavalry to Qibi He Li, wearing only key protective armor on his body, and the horses were not wearing armor, which was specially used to chase and block the opponent's scouts.

Then Li Shiji took out 10,000 cavalry to join in, and Zhang Liang led the 10,000 cavalry plus 10,000 infantry to Beisha City (Later Dalian), and after taking Beisha City, this means that the entire Liaodong Peninsula is already under the control of the Tang Dynasty.

By that time, more than half of Goguryeo's territory had been lost.

……

Pyongyang, Yuangai Suwen was a little anxious, he never expected that Datang would be so difficult, especially the 20,000 cavalry, he couldn't know how they managed to hold out for so long.

Although it is said that the logistical supply of horses is not needed, and supplies can be found from the mountains and forests, but what about people? Where did they get so much food?

Those villages? The food needed for 20,000 cavalry is not a small number, how much food can there be in those villages? You must know that he had already ordered the cities to gather as many people as possible in the vicinity.

Twenty days had passed, and none of the scouts he had sent out had brought back news, or rather, not at all.

If there is no news, either they went but couldn't come back, or they were directly caught by the cavalry of the Tang Dynasty.

Not even the few ships he sent out that tried to make their way to Beisha City by sea did not get any news.

Of course, what Yuan Gai Suwen didn't know was that the fleet of the Tang Dynasty was cruising in the Bohai Bay, especially in the open sea of Pyongyang, and there were many large and small ships of the Tang Dynasty cruising in this bay.

Qi He Li and their cavalry did only have dry food at the beginning, but Yuan Gai Suwen did not expect Li Shiji and them to solve the front line of Liaodong City so quickly, and they could quickly replenish food and grass for Qi Qi He Li, and secondly, he did not expect that Datang's ships could use small boats to supply these cavalry from the sea.