The narrow part of the Anshi City Gate that was blown down has become the focus of repeated contention between the Tang army and Goguryeo, and even Li Shimin in the rear couldn't sit still, and immediately sent Li Daozong to lead a large army to replace the exhausted Cheng Yanjin's army, although this made Cheng Yanjin very dissatisfied, but he also knew that his soldiers were almost unable to hold on, so he finally retreated.

However, although Li Daozong's army was full of energy and tried his best, in the end, even gunpowder was thrown at the gap full of Goguryeo people as if they didn't want money, but the Goguryeo people in the city seemed to be crazy, and they refused to take a step back no matter what, and even the city lord Yang Wanchun personally stood in the gap to supervise the battle, which further stimulated the morale of the Goguryeo people, and finally fought hard until the second half of the night, and still failed to make any substantial progress.

"Your Majesty, it's too dark now, the siege of the city is not good for us, and the terrain at the gap opened by the explosion is narrow, and we can only go up a small number of troops at a time, and we can't give full play to our advantages at all, and the Goguryeo people are extremely tenacious, I don't think there will be any results if we continue to fight, so let's withdraw our troops!" At this time, Li Ji opened his mouth to suggest to Li Shimin.

"No, we fought for three days, and finally opened a gap, if we retreat at this time, it will only give the other party time to breathe, and now that the sky is almost dawn, as long as we hold on a little longer, and wait until dawn to work harder, we will definitely be able to capture the city in one fell swoop!" Cheng Yanjin said very unconvinced at this time, after he was replaced just now, he refused to go back to rest, staring at the situation on the battlefield with his two eyes, as if he wanted to rush forward again at any time.

"Zhijie, now is not the time to be rash, and after a day and a night of siege, our spirit has been lost, but the Goguryeo people in the city have aroused the will to die, and if they continue to fight like this, it will only increase casualties, so let's withdraw and make plans again!" As soon as the words of biting gold fell, Li Shimin suddenly spoke.

Although Li Shimin has not led troops for many years, as a commander who has experienced a hundred battles, he still has a lot of experience on the battlefield, and at this time he also saw that there would be no results if he continued to fight, and he and Li Ji's views were completely consistent with this.

"But Your Majesty ......" Cheng Yanjin still didn't want to withdraw at this time, after all, he had said before that it would take three days to conquer Anshi City, but now three days have passed, and in these three days, he has also spent a lot of manpower and material resources, and he has also consumed countless efforts, and even firearms have been used, if he retreats like this, how can he be willing?

Before Cheng Yanjin finished speaking, Li Shimin interrupted him and said: "Zhijie, I didn't expect Anshi City to be so difficult to fight before, so don't be too entangled in the previous words, let's reconsider!" ”

Hearing Li Shimin talk about this, Cheng Yanjin had to sigh helplessly at this time, and then Li Shimin ordered the troops to retreat, and the army led by Li Daozong finally slowly retreated after launching the last wave of attacks, still failing to break through the defense line of the Goguryeo, and the Goguryeo people at the head of the city found that the Tang army was no longer attacking, and immediately let out a tsunami-like cheer, which was able to repel the first real attack of the Tang army, and also made them more confident.

In contrast, the Tang army was demoralized, originally after annihilating Gao Yanshou's 150,000 army, the whole army thought that it could directly advance into Pyongyang City, even if it was an ordinary pawn, he didn't put Anshi City in his eyes, but he didn't expect that it was this inconspicuous Anshi City that actually blocked the attack of their army, and even Li Daozong's reinforcements went up later, but they still returned in vain, which cast a shadow on everyone's hearts.

However, although the attack failed, Li Shimin did not blame anyone, in fact, this siege failed, all of them had to bear a certain responsibility, that is, too light the enemy, not biting gold Although the enemy was light, but a detailed plan was made in advance, and in the end even the city wall was blown up, but still failed to break through Anshi City, which is enough to show the tenacity of the other party.

With the retreat of the Tang army, Anshi City also immediately began to repair the city wall, and in the afternoon of the next day, the section of the city wall that was blown down had been blocked with bricks and stones, and there were many dead bodies that had not had time to clean up.

After returning to the barracks, Li Shimin first ordered Cheng Yanjin and Li Daozong's army to rest for two days, and then convened the generals and ministers to discuss matters, but Cheng Yanjin was the first to stand up and say: "The minister is too light on the enemy, please punish Your Majesty!" ”

"Zhijie, don't blame yourself, I can't blame you for this incident, and now for us, the most important thing is to discuss the way to break through Anshi City, do you have any good suggestions?" Li Shimin first appeased Cheng Yanjin, and then asked again.

As soon as Li Shimin's words fell, he saw Cheng Biting Jin speaking again: "Your Majesty, although the previous minister's attack was unfavorable, but later used gunpowder to blow up the opponent's city gate, so that the other party had to give up the advantage of the city wall, and instead fought hard with us in the gap. ”

Hearing Cheng Yanjin's suggestion, Li Shimin also felt that it was very feasible, but Li Ji said at this time: "Your Majesty, General Cheng's suggestion is very feasible, but after Anshi City suffers this loss, it will definitely be on guard, and when we want to send gunpowder to the other party's city wall, I'm afraid we will also need to pay some price!" ”

"This is a problem, if you want to blow up the city wall, you must use a large number of siege tubes, and you can't simply stack them under the city walls, but you need to make holes in the city walls, and then put the siege tubes in it, in order to exert the greatest power, Goguryeo in Anshi City may not let us complete these things so easily." Li Xiu also nodded thoughtfully when he heard Li Ji's words.

"It's a bit difficult, but it's a good idea, but it costs a lot of gunpowder, but if there's really no other way, you can only use this method to try." Li Shimin hesitated for a moment at this time, but spoke again.

"Your Majesty, there is a way to try it here!" At this moment, I suddenly saw Li Daozong stand up and speak.