The attack on the North Three Gates of Chang'an was more intense than the attack on the second day, and the initial phase was the same as the next day, with only bed crossbows, catapults, and crossbow troops engaged in long-range attacks, but as the battle progressed, the siege troops also entered and began to use ladders to attack the northern city wall.

Zhan Hong and Wang Ji personally supervised the battle on the front line, and commanded the right army and the rear army to launch a powerful attack on the three northern gates of Chang'an.

This order was naturally given by Liu Yin, with the completion of the gunpowder filling in the tunnel of the southern city wall, it is about to be blasted, after the blasting destroys the city wall, the Yang'an camp and the Wudang battalion, the Hubu battalion will be put into the battlefield one after another, if the Wei army has a heavy army deployed in the southern city, when the Shu army enters the Chang'an city, the street battle will be carried out very hard, in order to reduce the attack pressure of the Shu army in the southern city, at this time it is necessary to properly strengthen the offensive of the northern city, at least attract the attention of the Wei army to the north, so that there is a vacancy in the south, to provide some help for the Shu army's entry into the city.

After receiving the order, Xian Hong and Wang Qi naturally spared no effort to launch an attack, and for a time under the north city wall of Chang'an, the Shu army gathered like ants, densely clinging to the entire city wall, and the killing sound shook the sky, and the offensive was like a tide.

Sima Wang has been staying on the north city wall to supervise the battle today, the attack of the Shu army is there, he appeared there, originally thought that the Shu army's offensive today will be the same as yesterday, ending in a dull end, but after the sun turned west, the Shu army suddenly exerted its strength and launched the most fierce offensive, so that the Wei army, which was originally a little scattered, was caught off guard, and the defense of the north city wall once fell into passivity, showing a dangerous state.

In the face of the Shu army's tidal offensive, the faces of the soldiers around Sima Wang turned white. He hurriedly suggested that Sima Wang transfer the defenders from the other three places to reinforcements.

Sima Wang was very calm. There was no rashness. Don't look at the Shu army's offensive tide, but now it is not clear whether the Shu army is feintting, if the defenders of the other three places are mobilized without authorization, it will inevitably make the defensive forces of the other places weak, if the Shu army takes the opportunity to suddenly launch a strong attack on one of the other three places, the start will not be good.

Therefore, Sima Wang did not mobilize the troops and horses of the other three places, but only mobilized the reserves in the city to help defend the northern city wall, and at the same time strictly ordered the other three city walls to strengthen their guard. There must be no slackness, we must pay close attention to the movements of the Shu army, and once we find that the Shu army has abnormal movements, we must put ourselves into the defensive battle as soon as possible.

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"Young Master, the gunpowder has been filled, when will it be blasted, please show the young master!" The military marquis of firearms Qu came out of the tunnel, ran quickly in front of Liu Yin, and reported to Liu Yinyu.

According to the general war film, before launching a general offensive. The commander-in-chief will raise his wrist to look at his watch, but unfortunately this is the Three Kingdoms era. There is no watch for Liu Yin to pretend to be forced, but the pro-soldiers behind him have hourglasses, and timekeeping in this era has to rely on hourglasses. However, Liu Yin didn't look at the hourglass, he looked up at the sun, it was about three o'clock in the afternoon, and according to the ancient time, it was already Shen time.

Because Chang'an City is large enough, the battle situation on the north side of the city is almost inaudible, but Liu Yin can imagine that Xian Hong and Wang Qi launched a strong attack on the north city, which will inevitably cause some trouble to the Wei army defending the city, even if the defenders of the south city wall have not been transferred to the north gate, but at least now the attention of the Wei army has been completely attracted to the north city, and now it is the right time to blast the south city wall.

"Blast now!" Liu Yin gave the order to blast.

"No!" The marquis of Firearms Qu gave up his hand and turned around and ran to the entrance of the tunnel, but this time he did not enter the hole, but gave the order to blast at the firearms Qu soldiers in the tunnel.

The scene was silent, and everyone held their breath, waiting for this historic moment.

Liu Yin glanced back at Wei Xuewu behind her, and found that her eyes were staring closely at the city wall of Chang'an City, her face was pale, Liu Yin quietly held her left hand, the tentacles were as warm as jade, soft as boneless. He smiled shallowly and said, "Xue Wu, don't be too nervous. ”

"Wenxuan, are you sure it will succeed?" Wei Xuewu asked with a look of concern on her face.

Liu Yin smiled calmly: "Don't worry, you have already seen the power of gunpowder, no matter how strong the wall of Chang'an City is, it will definitely not be able to resist the blasting power of three thousand catties of gunpowder." ”

Wei Xuewu nodded, but her gaze was still very solemn, she had seen a single bamboo grenade, the power was indeed amazing, but gunpowder was used in siege operations, she really hadn't seen it, three thousand catties of gunpowder, six carts were loaded, Wei Xuewu watched them be sent into the tunnel, but the walls of Chang'an City are so magnificent and majestic, it is light that these gunpowder can shake, not only her, but even the other people around Liu Yin, there is no bottom in their hearts.

Whether or not Liu Yin's promise to conquer Chang'an within three days can only be based on these gunpowders, and everyone's eyes are focused on the city wall, silently waiting for the miracle to happen.

Since the tunnels are miles long, it will take a long time for the order to reach the tipping point under the city walls. Most of the soldiers in the tunnels have been evacuated, leaving only the soldiers responsible for the detonation, and the fuse is long enough to allow the soldiers who ignited the fires to escape the tunnels.

Time passed in breath by breath, staring at a target, everyone's eyes were a little sleepy, and just as many people were blinking, a shocking noise like muffled thunder suddenly came from underground.

"Boom—"

The sound was so loud that it made the eardrums of everyone present buzz, and the ground under their feet trembled visibly, feeling like a boat sailing on the waves, and the earth also surged, shaking everyone in a whirlwind.

If people who were miles away felt the huge earthquake of the earth, then the Wei soldiers on the southern city wall of Chang'an were like standing in the midst of a stormy wave, and the entire city wall shook violently. The first feeling of the defenders was like a strong air current, which threw them into the air along with the city wall, and then the city wall shook back and forth, and the amplitude was very large, and the defenders stood on the head of the city, as if they were standing on a lonely boat in the midst of the monstrous waves of the ocean, carried by the wind and the waves, desperate and helpless.

The entire city wall inevitably collapsed after the earthquake, and in a huge roar, the strongest city wall in the world collapsed. (To be continued.) )