There is no such thing as a free lunch, and Silla and Baekje took advantage of the fire to loot and annex all the Goguryeo lands east of Pyongyang. It may be that the heads of the commanders of the two countries have been washed away by a series of victories, thinking that Goguryeo, which was extremely powerful in front of them before, has now become a dead dog to be slaughtered, so the two countries are still a little unwilling to occupy the eastern territory, and while the Tang army is still on the way to Pyongyang, they even march to Pyongyang together, one south and one north attack almost simultaneously.

But it is said that the hundred-legged worm, dead but not stiff, the Yuan clan in Pyongyang City guarded against the Tang army, so they transferred all the elite troops east of Pyongyang City to the city, and as a result, Silla and Baekje took advantage of the loophole, otherwise with the troops of their two small countries, it would be impossible for them to be the opponent of the Goguryeo people, and now they dare to take the initiative to attack Pyongyang City, which is simply not known whether they are alive or dead.

In order to teach the two small countries a hard lesson, and also to boost the morale of the Tang army who were attacked one after another, under the personal leadership of Yuangai Suwen, a total of 150,000 troops were assembled in Pyongyang City and its surroundings, and Silla and Baekje together were only 120,000 people.

In this battle, the Goguryeo people were brilliantly defeated, and nearly half of the 120,000 troops of the two countries were annihilated in one fell swoop, of which 70,000 troops from the Baekje people, and only more than 20,000 people were able to escape back in the end. Only more than 10,000 people were lost, and the remaining 30,000 people were able to retain most of their combat effectiveness.

When Li Shimin swept all the way, swept away the territory of Goguryeo east of the Yalu River and west of Pyongyang City, and then rushed to Pyongyang City with a large army, he saw tens of thousands of defeated troops from the two small countries of Silla and Baekje.

For these two small countries that have not achieved enough things and have more than enough failures, Li Shimin is extremely angry in his heart. The Tang Army's labor expedition naturally made it impossible to use too many troops. Originally, Li Ji and Niu Jinda each led 50,000 troops, adding up to just 100,000, although he later brought 30,000 people from Chang'an. But because of the winter in Liaodong, many soldiers suffered severe frostbite, so he brought 30,000 to replace those wounded soldiers. The army has always maintained a size of 100,000 men.

However, with this conquest, every place he occupied, he had to leave a part of the garrison, plus a small number of casualties, and now he had less than 70,000 troops at his disposal. Originally, according to Li Shimin's plan, when attacking Pyongyang City, with the Tang army as the core, combined with the army of 120,000 Silla and Baekje, the number of troops surpassed Goguryeo's troops. But now the two small countries have only 60,000 remnants left, which is not only a small number. And the morale is completely lacking, it is estimated that when facing the Goguryeo people, it is already good to be able to run away on the spot, let alone expect them to fight a tough battle.

Li Shimin, who is annoyed as a father, but Li Su, who is a son, is gloating. Even many generals in the Tang army often laughed at the inadequacy of Silla and Baekje when they chatted and fart, and they were not satisfied with swallowing the land east of Pyongyang, and even wanted to swallow the richest Goguryeo capital with their own fragile army.

The original plan was broken. made the Tang army have to face more than twice as many enemy troops alone, but for this, Li Shimin and the generals in the army did not care at all, they were originally the elite of the Tang Dynasty, whether it was the quality of the soldiers or equipment, they were much stronger than the Goguryeos, plus with the help of gunpowder weapons, even if the enemy was doubled, they were confident that they would win the battle.

As soon as the Tang army and the Yuan army came into contact, several skirmishes broke out immediately, and both sides were using this method to assess the strength of the other party, although this kind of conflict had victory and defeat for each other, but unless the number of Goguryeo was several times that of the Tang army, there was only one consequence of being annihilated by the Tang army.

After several days of contact and preparation, both sides waited a little impatiently, and today finally came the day of the decisive battle, and the location was on the vast plain outside the west gate of Pyongyang. The 150,000-strong army of the Yuan clan lined up with their backs to the city of Pyongyang, and would fight to the death with the invading Tang army, if this defeat would cause Goguryeo to fall to the country, and if this victory would be won, Goguryeo would have a glimmer of life.

And the 70,000 Tang army is also highly moraled, in the face of the Goguryeo army twice as large as their own, but there is no fear, especially when they see the neatly arranged rockets and flying thunder cannons in their own army, as well as the grenadiers wearing light armor, their faces are even more relaxed, the early war has made the power of gunpowder weapons fully displayed, and most of the Tang army has accepted the existence of gunpowder weapons.

Li Su, who was riding on a horse, looked at the number of flying thunder cannons in front of him, and he was also a little proud in his heart, although the range of the flying thunder cannon was closer, and it also consumed gunpowder, but it was recognized by Li Shimin and most of the generals with its strong power and extremely convenient operation, and now it has become a standing weapon of the army, but unfortunately because of the problem of production and time, the number of equipment in the army is not much, and now the entire army is added together, and there are only fifty guns.

"Father, the son has something to understand, please ask the father for advice?" Li Su withdrew his gaze, and suddenly turned to Li Shimin next to him and asked.

"Oh? What's wrong with you? Li Shimin turned his head and smiled. He knew that although his son was intelligent, he knew almost nothing about marching and fighting, and he had already asked himself a lot of questions about military affairs along the way, and this time was certainly no exception.

"Father, the Goguryeo people know that our Tang army is elite, even if it is twice as many troops as ours, but they do not have any certainty of victory, in this case, why don't they defend the city, with the help of the tall and strong walls of Pyongyang City, don't they have a few more chances of winning?" Li Su asked, looking at the tall Pyongyang city wall in the distance. He has always been unable to understand this question, it is obviously easier to defend the city than to fight in the field, but why should the Yuan clan give up the easy and the difficult?

"Well, yes, yes, being able to ask this question shows that you also know a little bit about the art of war, but you are still far from knowing the real army!" After hearing this, Li Shimin pointed at Li Su and smiled.

"Erchen is stupid!" Li Su was depressed in his heart, and he finally led his troops to win the battle of Dengzhou, but when he came to Li Shimin, he became a person who did not know soldiers.

"Hehe, in fact, this is very simple, although it seems easy to defend the city, but in fact it is passively beaten, the Goguryeo soldiers are psychologically weaker than us, and the commander of the other side also knows that we have a blaster to break the city, no matter how tall the city wall, there are times when we break through, if the city wall is broken, the fighting spirit of the Goguryeo defenders is so big that it can almost withstand the role of 100,000 troops, plus our prestige of attacking all the way, it will make the opponent's soldiers have no will to fight, At that time, as long as we attack the city with all our strength, we will definitely let the other side's soldiers see surrender! When Li Shimin talked about the art of war, he immediately became radiant, showing the demeanor of a commander in the army.

"Therefore, if the other party defends the city, we can save a lot of time and effort, the Yuan Gai Suwen in the opponent's army is worthy of a rare handsome talent, just see through this, and even have the courage to fight to the death with us outside the city, this kind of brave and resourceful person can't be used by me, it's really a loss for my Datang!" Li Shimin said in the end, and he cherished the talent, the entire Tang Dynasty military generals are like clouds, but there are only a few people who can really be called handsome, such as Li Jing, Li Xiaogong and Li Ji, and others such as Cheng Yanjin, Wei Chigong, Niu Jinda and others, at most they are just generals.

Li Su heard Li Shimin's explanation, but secretly admired in his heart, the ancient art of war is really broad and profound, and even psychological warfare is taken into account, it seems that this leading troops to fight is really not something that he, a layman, can play.

After the two armies were arranged, they did not run out of the main general for a heads-up as in the TV series of later generations, but with the sound of war drums, the two armies slowly approached in a neat formation, and every time they took a step, the murderous aura on the battlefield was strong, and the nerves of the soldiers were tense for a point, and when the momentum of both sides reached its peak, a big war finally began.

"Ignition!" When the Goguryeo troops entered the range of the rockets, the general in charge of commanding the rockets gave an order, and the soldiers who had already prepared the torches immediately lit the fuse, and with a strange roar, one rocket after another flew out, crossed an arc in mid-air, and then slammed into the Goguryeo troops, and then a thunderous explosion sounded, countless human stumps flew up, and the groans of pain were even louder.

For the weapon of rockets, the Goguryeo people already knew something, knowing that although this thing was powerful, it was limited in quantity, and as long as it was entangled with the Tang army, the other party would stop firing, so driven by the generals, the Goguryeo soldiers turned a blind eye to the dead companions around them, and ran forward desperately, trying to get close to the Tang army.

Sure enough, when the two armies were only 100 paces apart, the rocket could only attack the Goguryeo army behind because of the range, but the soldiers in front were not happy for long, only to hear a dull roar in the Tang army, one by one black whirring things were thrown from the opponent's formation, and then fell in the Goguryeo army's formation, and then this black thing was a huge explosion, within a radius of a few zhang, even if it was not killed on the spot, it was bleeding from the ears and nose of the loud noise made by the explosion, and he couldn't even stand on his feet.

At this time, the archers of both sides also began to shoot, and a rain of arrows staggered through the air, and the shots clanged on the armor or shields of the opposing soldiers, and from time to time the unlucky ones were shot, and the angry curses and screams were combined. (To be continued) RQ