Yan Yun's attack was something Li Yuan expected.

Although Li Yuan was a little surprised by the amazing might of the enemy army, he was indeed prepared.

Looking out of the city, Li Yuan's eyes were slightly cold, and he said indifferently: "The enemy army has begun to attack the city, the time is almost up, let them do it, if they can delay for a moment, it will be a moment." ”

Li Shimin was beside Li Yuan, and when he heard this, he immediately understood, because this was the result of his and Li Yuan's discussions together. It's the thunder penalty that makes Gambe improve.

Although the lightning penalty is extremely powerful, it still has many limitations and cannot be fully used. It was Li Yuan who, at the suggestion of Li Shimin, asked Gan Bei to improve it.

Li Shimin no longer thinks about throwing, and in his opinion, the thunder punishment is still appropriate for the use of mines. Long before the arrival of Luo Cheng's army, it was buried outside the city.

The improved lightning punishment is undoubtedly more advanced than before, at least not so easy to be discovered by the enemy. As long as they don't actively expose themselves, they can stay hidden.

Li Yuan originally regarded it as a big killing weapon, but if he thinks about it carefully, looking at the current posture of the enemy army, if he doesn't make an early move, he doesn't know if there will be a future, wouldn't it be embarrassing?

It was Li Yuan who made up his mind and gave a direct order to expose this hidden combat power. Delay as much time as possible, maybe there will be a turning point in this battle, and it will also be a chance for him to turn defeat into victory.

Li Yuan naturally had his way of informing the news, and the soldiers hiding outside Chang'an City got Li Yuan's order and acted quickly. They were Li Yuan's personal guards and were loyal.

Compared to the initial lightning penalty, the ambush is undoubtedly much simpler to use at this moment. When the mechanism is opened, the fuse burns up, and the speed is transmitted to the past, and it is about to explode.

The place where this thunder punishment is buried is halfway from the Yanyun camp to the city of Chang'an. At this moment, there are still a large number of soldiers charging out, and now the detonation will definitely be able to achieve a certain effect.

Li Shimin doesn't know how many he can win, but what he can be sure of is that this time will definitely not be worse than last time. Strictly speaking, Li Shimin thundered the first battle, and he gained nothing, just listening to a firecracker.

Obviously, although the lightning punishment was buried in the middle, it has not been discovered now. Even if the enemy army can react, it is impossible to move in such a short time.

Time passed quickly, and under the attention of Li Yuan and others, the thunder punishment was finally detonated.

"Bang."

The roar that sounded like a thunderstorm in the sky shocked everyone in all directions.

As Li Shimin expected, even if the enemy discovered the abnormality, there was no time to dodge.

But he still underestimated Yan Yun's elite reaction, especially when Luo Cheng had already taught the method of retreat. They reacted immediately and threw themselves to the ground.

Although the lightning penalty is also a cross-era product, it is still very different from the grenades of later generations. After all, there is no shrapnel, and the damage of the explosion can only rely on the shock wave.

After the soldier falls to the ground, although he will also suffer some damage, it will not be fatal.

The explosions came and went, and it was obvious that Li Yuan had arranged more than one place, but even so, it couldn't change the final result.

The lightning punishment caused some damage to Yanyun's elite, and some of the soldiers who faced the explosion unfortunately died. But more often than not, he suffered some minor injuries that did not affect the battle.

The soldiers fell to the ground and were wounded, and the medical soldiers in the rear rushed out at the first time. Disinfecting and bandaging is done with simple medical means to prevent the wound from deteriorating and dying.

These soldiers were all elites trained by Yan Yun, and Luo Cheng was unwilling to let them be easily damaged. Even if there are certain deaths on the battlefield, losses must be avoided as much as possible.

Of course, it is worth mentioning that Sun Simiao also came to Chang'an with the army. He didn't like war, but under Luo Cheng's persuasion, he still came here.

The so-called saving a life is better than creating a seventh-level floating slaughter, even if this is a battlefield, it can also save people. The lives of the soldiers who were injured just now were also at stake, and in front of Sun Simiao, there was not much difference between them.

All parties were busy in a hurry, and when they heard the explosion, Luo Cheng's brows furrowed slightly, but he didn't speak. He was still waiting, as long as the right opportunity was met.

In Chang'an City Tower, Li Yuan also frowned, looking incredulous.

Although the lightning punishment played a certain role, the real effect was minimal, and there were not many casualties at all. This was a huge deviation from his intended plan.

But after the silence, Li Yuan could only choose to accept this fact.

Perhaps the appearance of the thunder penalty was a bit abrupt, and it also caused a certain obstacle to the army's charge. But in fact, he didn't have much influence, what should come will always come, and the bloody battle never stopped.

Yanyun's elite is well-trained, and there are many Snapdragon armies during it, and all of them are naturally strong. After some effort, it seemed to break through the forward line of defense of the defenders.

Jiang Song held a spear, swept away the arrow, and rushed directly to the city tower.

The cold and sharp eyes swept over, making everyone frightened, although Li Yuanba was also strong, but it was the first time they saw such a fierce killing intent, and they couldn't help but be a little frightened.

Unexpectedly, the enemy army broke through the defense line he had arranged so quickly and killed on top of the city tower, Li Yuan was a little surprised. But he quickly calmed down, and his eyes were lit up with Jiang Song.

"Yuanba, beat them down." Li Yuan did not hesitate and ordered Li Yuanba, who had long been ready to attack.

Now that Jiang Song has rushed up, if he continues to let Li Yuanba stand still, it will be tantamount to asking for his own death. After all, Jiang Song's martial arts are only slightly weaker than Li Yuanba, and he is not completely without combat power.

Holding the drum urn and golden hammer in his hand, Li Yuanba's fighting spirit was revealed, and he was also holding back for a long time, and now he was finally able to make a move. He didn't think much about it, he just fought it.

Although Li Yuanba obeyed Li Shimin's words, he really didn't understand much. That is, the fight can arouse his interest, and it would be great if he could have an evenly matched opponent.

In fact, Li Yuanba still prefers to crush, after all, an evenly matched opponent is too much of a waste of time. Previously, when he was in Yangzhou, Luo Cheng tried his best to kill Li Yuanba, and directly exploded his patience.

Even if Li Yuanba still retained his strong combat power at that time, he was unwilling to continue to fight with Luo Cheng. The reason for this is that it is too late, and Li Yuanba himself is a little impatient.

But in any case, Li Yuanba is the representative of the peak force value of this era. When he lifted the double hammer and walked towards Jiang Song, it directly made everyone's expressions solemn and the atmosphere was solemn.

But Jiang Song did not choose to evacuate here, although he knew that he was not Li Yuanba's opponent, he still wanted to challenge. Siming Mountain has become a thing of the past, and today has its own battle today.

"Dog thief, your grandfather Li Yuanba is here, and he still doesn't accept his life."

Li Yuanba shouted angrily.