At this time, Shi Tianze looked at the smoke with concern. Although he didn't know what medicine was sold in the Tongzhou Army's gourd, the smoke must contain killing moves, which is certain.

Just as Shi Tianze was up and down, as the rising smoke covered the city, a four-person blasting team on the Tongzhou Army quickly approached the city wall.

Their movements were rapid and fast, because the smoke lasted for a limited time, they had to complete the task of blasting the city wall as soon as possible.

The four-person team charged and arrived next to the moat. They untied their waterproof backpacks and used the buoyancy of their backpacks to swim across the moat.

After they arrived on the other side, they immediately ran a few steps to the bottom of the wall.

Several people could only see their vague figures in the smoke. They all wore rubber gas masks inlaid with glass, and the respirators were filled with charcoal particles and moist cotton cloth, which could filter most of the toxic smoke.

Two of them quickly opened their backpacks and took out the equipment inside.

The other two engineer soldiers stood face to face under the wall, each holding a two-foot-and-a-half-foot-long pickaxe in his hands.

The hoe tip of this pickaxe is not a flat surface like a hoe, but a metal point cone shining with a cold light.

When the four of them were ready, the two engineers holding pickaxes nodded hard at the same time! Then the pickaxes in their hands rose and fell one after another, and they swung them into a crack on the blue brick wall.

Their movements were silent before, but after the first hoe was chiseled, a loud chiseling sound would be made immediately.

So they were orderly in preparation, but at the beginning they started to chisel the wall, their movements immediately became rapid and fierce! It took almost five seconds for each person to hoe five or six times, and a hole with a thickness of a fist and a depth of more than one foot was smashed on the blue brick wall.

Then the two of them retreated back... At the same time, another engineer stuffed a blasting tube that was only half a foot long, which was as thick as an egg in his hand, into the hole.

After he pulled the lead, all four of them fell on the city wall, and there was a bang! Several thick and thick bricks of the city wall were broken and opened with the explosion, and a hole as the size of a washbasin and more than two feet deep appeared on the city wall.

At this time, the engineer team had already heard the sound of messy footsteps coming from above their heads.

Obviously, the soldiers guarding the city above had discovered that the situation below was not good. It was estimated that it would not take long before large pieces of rolling wooden stones were smashed down! The four-man engineer team once again dug a deep hole in the rammed earth exposed from the city wall.

The blasting tube they stuffed in this time was as thick as a man's upper arm, and the length was one and a half feet.

The second blast successfully took out a cylindrical cavity of one and a half feet thick and five or six feet deep! After that, four waterproof backpacks were continuously stuffed into the cavity.

The four-man engineer team pulled down the lead and turned around and ran without hesitation! As they flew into the moat, the engineers clearly heard the sound of heavy objects behind them hitting the ground.

The enemy's rolling wooden stones were still smashed down, but in vain.

Then when they swam across the moat, they immediately went ashore and rushed forward desperately.

It was as if they had run fifty meters in a few seconds.

At this time, a dull roar suddenly came from the Hejian Mansion city wall behind him! "It's done!"

Li Muyuan looked at the figure of the engineer team running out of the smoke, and then smiled.

As soon as he heard the sound of the blasting, Li Muyuan knew that the mission of the blasting team was completed very well, and the city wall opposite was undoubtedly collapsed! Although Li Muyuan is young, he can be said to have experienced many battles.

He has heard such blasting sounds in the city wall blasting, actual combat and training he had experienced before.

When this kind of rammed earth-covered brick city wall is blown up, if the sound of explosives is crisp and loud, like a thunder thunder blew in the ears, it often means that the power of the gunpowder explosion is not transmitted to the rammed earth in the city wall, but is spraying outwards.

In this case, the explosion personnel called "release guns" because the force of the explosive is like a musket and is sprayed out along the filling port.

In this way, a hole the size of a house will be taken out, but it will not collapse.

On the contrary, this dull and heavy sound means that the power of the explosives is stuffed inside the city wall, which means that the city wall is finished.

Sure enough, after this, Li Muyuan clearly felt the ground trembling.

The sound of the city wall collapsed and fell downwards after it was exploded, which shocked the ground with a long and heavy tremor. You don’t need to read it. This was a textbook-like explosion! After that, a team of cavalry in the Tongzhou army rushed towards the city wall, and the artillery also shot the second round of smoke bombs at the part where the Hejianfu city wall was blasted.

The smoke bombs they fired this time were non-toxic models using potassium chlorate as smoke agent, because the Tongzhou army was about to charge.

Just as the second round of smoke began to rise, the small team of cavalry also came to the city and quickly checked the explosion of the city wall.

Everything was as imagined. The Hejianfu wall was blown open for about twenty-five meters long, and the originally towering city wall had turned into a huge earth slope covered with floating soil and broken bricks.

Not only that, even the moat that was close to the city wall had been completely filled with the collapsed city wall. For the Tongzhou army, Hejian Mansion was already flat! In an instant, Li Muyuan heard the reconnaissance troops in front of him and issued a whistle representing everything going well.

Immediately under his command, a team of Tongzhou troops rushed towards the breakthrough!... During this whole process, Shi Tianze on Hejian Prefecture City was covered with smoke and was so dizzy.

However, when he heard the city wall collapsed, Shi Tianze's heart sank immediately! He hurriedly organized the soldiers on the city to defend quickly... But just when he came to the breakout of the city that was blown up and asked the soldiers to line up to block the place.

Suddenly, a sound of horse hooves like heavy rain came from the smoke! Cavalry! They actually used cavalry to break the city?
Chapter completed!