The sky cannon can be fired in a straight direction and can be used on any terrain. There is no need to dig fortifications and it can be hidden directly in the ruins of Dongguangou Village.

The musketeers and grenadiers were different. After they arrived on the slope opposite the bottom of Dongguangou ditch, they began to dig fortifications in a patch of weeds.

What makes Yang Zhen most satisfied is that the grenadiers led by Li Lu have now come up with more tricks. They dig holes in the middle of the road, and then put in the tens of thousands of enemies on their backs, and then attack them in front of the tens of thousands of enemies.

On top of the fuze, a match rope of varying length or length is tied.

In this way, they can light the match in advance based on the signal from the lookout on the opposite hill, and then wait until the enemy arrives to explode on time.

The match rope burns very slowly, and the burning speed is relatively stable. Once it burns, it will not go out for a long time as long as it does not encounter heavy rain.

This provides an opportunity for the creation of a primitive version of the time bomb.

As a result, the match ropes that had been eliminated in Yang Zhen's advance camp regained new vitality.

This time, Li Lu was like this. On the dirt road at the bottom of the desolate Dongguangou ditch, he directed his men to dig a deep barrel-shaped pit every few steps, and laid out twenty individual missiles in a row, weighing as much as

A twenty-pound iron shell is invincible to thousands of enemies.

At the same time, a match rope of the same length is tied to the exposed powder fuse of the iron-shelled enemy, so that these ten thousand enemies can explode together at roughly the same time.

Of course, it's hard to say how accurate this kind of thing is. Although they have tested it many times without tens of thousands of enemies, they can't guarantee that everything will happen according to the test steps in actual combat.

Therefore, they laid a layer of hay on the pit where the enemy had placed, and prepared a large number of pine torches. If the time calculation was miscalculated and a delay occurred, they would throw pine torches to remedy the situation.

Li Lu had just laid out ten thousand enemies on the road at the bottom of Dongguangou ditch, when a burst of earth-shaking sound came from the direction of Woniu ditch, a few miles northeast of Dongguangou ditch.

"Captain, we are right! This is exactly what happened to the enemy!" Li Lu said excitedly to Yang Zhen after hearing the violent explosion in the direction of Woniugou.

As soon as Li Lu finished speaking, there was another violent explosion in the direction of Woniugou. Li Lu listened carefully and continued to say excitedly:

"This sound is the sound of the flying general! - Ouch, this is the sound of the cannon! Commander, the Woniugou side has already taken action!"

"That's right, we came to the right place! We came to the right place!"

The battle started in the direction of Woniugou, which shows that Zhang Chen and others rushed ahead of Shi Tingzhu's vehicle, artillery and baggage team and entered the ambush area on the east and west sides of Woniugou. It also shows that they successfully launched the ambush battle.

Yang Zhen was not worried about the outcome of the ambush battle, or in other words, he was not worried at all that Zhang Chen and the others would fail.

Because they only need to blow up the front and back roads of Woniugou and trap Shi Tingzhu's carriages, artillery and supplies in them, creating a dilemma.

And this can be easily accomplished by deploying a few enemy missiles to blow up the path full of Tatar heavy artillery convoys.

Therefore, Yang Zhen was as excited as Li Lu when he heard the sound of explosions coming from the direction of Wo Niugou several miles away.

But while he was excited, he did not forget his purpose, so he immediately ordered everyone to hide on the spot and not expose their hidden secrets.

"Hurry up and send an order to everyone to hide on the spot. If there are Tatar cavalry rushing past our eyes in a while, we will all hide and we are not allowed to act rashly! If anyone ruins my big event, I will chop off their heads!"

Li Lu listened to the order and shouted Yang Zhen's order in a low voice while waving a small flag in his hand left and right to signal Yu Liangtai and others on the opposite hilltop to hide and not expose their hiding position.

Yang Zhen buried his head in the trench that had not yet been completely dug on one side of the road at the bottom of Dongguan ditch, pondering Shi Tingzhu's reaction after being attacked.

After Shi Tingzhu was attacked, once he found himself in a dilemma, there were only two ways to go.

One is to fight back and repel the Ming army that ambushed him.

The other is to send people out to ask for help.

And the only people he can ask for help are Dodo or Hauge, who are not too far away from here.

Yang Zhen was just thinking about when Shi Tingzhu might wake up and he could not defeat the ambushing Ming army by himself, when he suddenly heard the sound of rapid horse hooves coming from the northeast of Dongguangou ditch.

The sound of horse hooves "thump, thump, thump, thump" came from far and near, and then galloped past the ditch and bushes where Yang Zhen was hiding.

It wasn't until the sound of horse hooves got closer and further away that Yang Zhen poked his head out and quickly looked in the direction where the horses were galloping away. He saw several knights with money rat tails on their backs on their backs, rushing south quickly.

Almost in a few short breaths, the group of Tatar cavalry disappeared on the winding road of Dongguangou.

Yang Zhen was worried that behind this group of knights, there might be some Manchu Tatar messengers rushing out from the direction of Woniu ditch, so he hid in the trench for a long time.

However, apart from the constant bursts of explosions coming from the direction of Woniugou, no other Tatars came from there.

The sun gradually sets from the top of the mountain to the back of the mountain, and time passes moment by moment.

The sound of explosions in the direction of Woniugou is still coming continuously.

However, the musketeers, grenadiers, and gunners commanded by Yang Zhen and Li Lu gradually fell into anxiety and suffering from their original excitement.

Especially Yang Zhen himself.

He didn't even need Li Lu's prompting to hear the rumble of artillery in the direction of Woniugou. It was not just the sound of tens of thousands of enemies and soaring cannons.

There was a roar that was both unfamiliar and familiar. Every time it rang, Yang Zhen was frightened.

That was the distinctive loud noise made by the heavy Hongyi cannon when it was fired.

This loud noise was similar to what Yang Zhen had heard at the mouth of Lianshan River before, except that the sound of Hongyi cannon coming from the direction of Woniugou made him even more uneasy.

This shows that Shi Tingzhu has stabilized the situation of the Woniugou ambush battlefield, and has even begun to deploy the Hongyi artillery carried with the army on the spot to launch a counterattack against Zhang Chen and the others.

Of course, Yang Zhen knew that Zhang Chen and the others had not tried their best, and the current situation included his consideration of surrounding the point to provide reinforcements.

But he was still secretly worried that Zhang Chen and the others would not be able to control the situation.

Once Shi Tingzhu led his team out of Woniugou and rushed to Dongguangou along the way, Yang Zhen's plan to mobilize reinforcements against the Manchu Tatar encirclement point would have failed.

But once he encounters reinforcements from Duduo or Haoge while fighting with Shi Tingzhu's white-flag Han army, he will really be self-defeating.

Time passed moment by moment, and the golden light of the setting sun finally disappeared completely from the valley.

It wasn't dark yet, but the bottom of Dongguangou ditch was already dark.

Yang Zhen couldn't help but feel worried secretly. He inadvertently looked up at the hilltop opposite, and saw a tree on the hilltop opposite suddenly falling down.

"Message tree!"

Yang Zhen secretly screamed in his heart, followed by a burst of ecstasy.

This is the method he taught Yu Liangtai to deliver messages.

When Yang Zhen retreated from the top of the mountain, he gave Yu Liangtai the telescope he carried with him so that he could observe the movements at the south end of Dongguangou and even in the direction of Xiguangou at any time.

If reinforcements from the Tatars arrive from the direction of Ningyuan, ask them to bring down a tree on the hilltop opposite.

Li Lu on the other side jumped up from the trench where he was hiding in surprise and joy, and said to Yang Zhen: "Captain, Governor, Yu Dusi knocked down the tree! The Manchu Tatar reinforcements have really come to Dongguangou ditch!"

Originally everything was unknown, but now everything has been determined, and all that's left is to start the fight.

Yang Zhen felt confident and immediately ordered: "Quick, send a signal to Yu Liangtai, and ask him to send someone back to pass my order, and let Qiu Zhenhai lead his team to land and come for reinforcements!"

What Yang Zhen said was very complicated and could not be expressed by ordinary semaphores without prior agreement.

But fortunately, Li Lu and Yu Liangtai had already made an agreement on these matters. When the critical moment came, they didn't need to say a word. They just had to raise a special flag and wave it a few times, and the other party would understand what he meant.

After listening to Yang Zhen's order, Li Lu quickly jumped out of the ditch, raised the flag in his hand, and waved the flag violently back and forth toward the hiding place of Yu Liangtai and others on the opposite hilltop.

At this time, Yang Zhen noticed that not only did he receive Li Lu's signal on the hilltop opposite, but another tree was knocked down immediately, which made him feel a little uneasy again.

According to the previous agreement, knocking down a tree means that the enemy is coming, but the number is less than a thousand.

Once two trees are knocked down, it means that the enemy is not only coming, but also in greater numbers, exceeding two thousand people.

"Captain, the reinforcements from the Manchu Tatars exceed 2,000 troops. Should we continue with the original plan of attack, or should we make other arrangements?"

"Other arrangements? What other arrangements can you make?" Yang Zhen heard Li Lu say this and looked at him in surprise and asked.

"The meaning of the humble position is that, Commander, you might as well move to the top of the opposite mountain. The view from above is wide, so that the Commander can control the overall situation. As for the position at the bottom of Dongguangou Valley, just leave it to the command of the humble commander!"
Chapter completed!