After some exploration, Chen Ying and the others really found the secret passage connecting Hexia City to Huai'an City, which was under the chicken coop of a family with a yard near the Huai'an city wall.

The wooden planks used to cover the tunnel were covered with a thick layer of foul-smelling hay, because the family had already run away from the war, so there was only dried manure in the chicken coop.

In order to prevent the grass from startling the snake, Chen Ying and the others did not all go into the secret passage, but only Chen Ying and Bi Shunwen entered the secret passage together, and they turned around in the secret passage, and it took about a quarter of an hour to come to the exit.

Chen Ying took the lead in pushing open the wooden plank blocking the exit, only to find that the exit was in a rockery in a courtyard, which could directly see the city wall of Lanyuan Gate, from which it could be inferred that the location of this secret door was behind Lanyuan Gate.

Su Yan didn't act rashly, or rather, Su Yan was not ready to expose the back hand of the secret passage so quickly, this secret passage collapsed in many places underground because of its disrepair, so it could only accommodate two soldiers at the same time, which was only suitable for small forces to sneak into the city to launch a surprise attack, and could not let a large army enter the city to fight.

After thinking about it repeatedly, Su Yan still put the matter of the secret passage behind him for the time being, and instead supervised the auxiliary soldiers to find a suitable place to dig the tunnel in Hexia City, but soon two questions were placed in front of Su Yan.

First, the possibility of excavating tunnels in Hexia City is too high, during the day the Qing army is condescending, the entire Hexia City is almost unobstructed, and it is good that there are buildings blocking it when excavating, but it is a little difficult to clean up the excavated soil.

The second issue is the most important, and that is the sound, the sound that comes out during construction.

The former is very easy to solve, in the night to select soldiers who do not suffer from night blindness to discredit the construction, as long as it survives the stage of just starting the ground construction, it will be difficult to be discovered by the Qing army in the future, and those dirt can also be piled up in the surrounding abandoned houses, as long as it is not exposed to the sight of the Qing army, there is no problem.

But the latter, Su Yan suddenly made a difficulty, although the sound of the shovel digging the soil seemed to be very weak, but in the quiet night, this sound would be amplified thousands of times, and when they met the Qing army with sharper ears, as long as it was heard, they would immediately guess the intention of the Ming army.

During the day, the sound of excavation can be masked by shelling, but at night, the construction must be carried out at night, and the construction will not start until this problem is solved.

Su Yan couldn't think of a good solution for a while, so he told Zhang Huangyan about this problem.

After listening to his story, Zhang Huangyan only thought for a while, and then said, "Your Highness, this problem is actually very easy to solve."

"Oh?"

Su Yan hurriedly motioned for him to continue.

"I think Your Highness must have heard of the allusion to the embattled." Zhang Huangyan first threw out an allusion, and then said: "However, we don't need to follow the example of the former Han Gaozu and sing the folk songs of the Qing army's hometown on all sides in Huai'an, but beat drums, gongs, and trumpets at night to make noise to cover up the sound of auxiliary soldiers digging, and at the same time, it can also have the effect of disturbing the morale of the army and making it impossible for them to sleep."

As soon as Su Yan heard what he said, his eyes suddenly lit up.

"It's a good strategy." Su Yan approvingly: "This is really a strategy to kill two birds with one stone, if you can make noise for a long time, and the Qing army is not well rested, you will be messed up first."

After that, Su Yan passed the order and ordered people to build high platforms around Huai'an, and the soldiers beat war drums, gongs, and trumpets on them, in order to ensure that the noise was loud enough, Su Yan even ordered people to search for suona in the countryside, suona is known as the existence of musical instrument hooligans, as soon as suona comes out, who will compete?

However, considering that it would take time to search for and erect musical instruments, Su Yan did not order excavation that night, but planned to wait until the next night to start construction.

This gave the Qing army a chance to do it.

In the middle of the night, Huai'an Lanyuan Gate was secretly opened a gap large enough for a horse to pass through, and the Qing army Mongolian Red Flag Niu Lu Zhang Jing Cha Gan Bala took the lead in riding a war horse out of the city gate, and behind him, the entire Mongolian Eight Banners cavalry of Niu Lu passed through the city gate silently.

Each of them was dressed in a Mongol-style robe, the hooves of the horses were wrapped in heavy cloth, and their mouths were also wrapped in cloth to avoid making any noise, and these Mongolian cavalrymen carried Mongolian scimitars at their waists and a side of grass on their backs

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Chapter 219: Night Attack Defeat Free Reading:,!

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Yuan bent the bow, and everyone's faces had a faint murderous aura.

The Mongol cavalry, even hundreds of years after the fall of the Mongol Empire founded by Genghis Khan, still maintained their mastery of bows and horsemanship, and as long as they rode on a war horse, they were the pride of the sky, and even the Manchurian cavalry could not compete with them.

Their target was the Ming artillery, and Nikan gave the Niu Lu a death order, no matter what the cost, they were to rush into the Ming camp and destroy the Ming artillery, for which they also carried wooden wedges for blocking the artillery.

"Speed up and rush in before the Ming Army finds out." (Mongolian)

Chaganbala commanded the three hundred cavalry under his command, and the cavalry echoed, then increased the speed of the war horses and rushed towards the Ming army camp, because there was a thick cloth wrapping, the crisp sound of the horses' hooves became dull, and it was not easy to be discovered.

However, the Mongol cavalry apparently did not take into account the fact that most of the Ming army did not suffer from night blindness, and they also took it for granted that the Ming army was blind at night, which led to the tragedy.

"Enemy attack—"

The Ming army sentry who was on vigil spotted the Qing cavalry rushing towards the camp, and he raised his throat and screamed loudly, while picking up his club and vigorously striking the gong to warn him.

The piercing sound of the gong instantly resounded over the entire Ming army camp, waking up the Ming army who were still asleep, They sat up from the bed suddenly, and no matter where the enemy came from, they hurriedly picked up their weapons and rushed out of the camp tent - because it was outside Huai'an City, the Ming soldiers did not take off their armor when they slept, so they were able to directly pick up their weapons and enter the battle.

And on Huai'an City, Nikan, who was anxiously looking at the direction of the Ming army's camp, also heard the sound of this warning gong, his heart tightened, and he sighed, knowing that tonight's attack failed, and most of the 300 cavalry sent out would not be able to come back.

Unless Chaganbala dares to disobey the military order - after all, he gave the order to die.

Nikan overestimated the loyalty of the Mongols to the Qing court at this time, and with the degree of control over the Mongols, the latter would not make unnecessary sacrifices in the event of mortality.

It's good to say that they rushed in before the Ming army found out, but the Ming army had already discovered them in advance, and if they rushed over again, they would be sent to death.

Therefore, Chaganbala looked at the camp of the Ming army that began martial law, and then looked at the brothers of the same clan who were following him, gritted his teeth, and decided to disobey the order and retreat.

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Chapter 219: Night Attack Defeat Free Reading:,!

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