It’s all in the longevity!

After the Yongji Pass Ancient Road, there is the Lang Son Ancient Road.

The Lang Son Ancient Trail is not long, only less than 20 kilometers, and there are not many bends. It is almost a straight and broad road.

But why did Guo Kui choose to take a detour rather than go here during the Song-Yue Xining War?

Because it is located between two mountain ranges, like a narrow strip of sky, the Vietnamese army built a fort in the middle and occupied the mountains on both sides. Even 200,000 people, let alone tens of thousands of people, would not be able to break through.

As difficult as the road to Shu.

Therefore, since ancient times, Yongji Pass and Lang Son Road have been the boundary line between the Central Plains Dynasty and the Vietnamese Dynasty. Vietnam occupied this natural barrier and thus avoided the risk of national destruction.

But now, times have changed, little brother.

In the middle area of ​​the Lang Son Ancient Trail, there is a mountain about three or four hundred meters high, which is the highest ridge nearby.

A flat area was cleared on the top of the mountain, and all the weeds and trees were cut down. Three or four meters away from the edge of the cliff, there were rows of large and small gun barrels, shining with a strange silver light in the August autumn sun.

Almost as soon as the artillery position was assembled, the gunners simply pointed the muzzle towards the Ly Dynasty's Lang Son Pass without much calibration, when Di Qing gave the order to fire at the enemy.

Only precision strikes require calibration, while carpet coverage only requires direction.

What's more, the end of the mountain road is full of Li Dynasty camps, so there is no need to aim. As long as the direction is right, you can basically hit the Vietnamese army by firing randomly.

Therefore, Di Qing was too lazy to waste time.

He shouted, "Boom!"

"fire!"

"fire!"

"fire!"

"Beep, beep, beep!"

Several messengers shouted loudly.

Then the whistle blew loudly.

The entire position was filled with the sharp and piercing sound of whistles.

Almost at the moment the whistle sounded, the crew members of both the large and small cannons immediately took action.

Some were stuffing shells in, some were poking plungers in, and some were taking out flints and lighting small torches they carried with them. In an instant, everyone had finished loading.

The next second, the team leader fired the ignition, and the first to fire were the small steel cannon team. Their gun barrels were short and the firing speed was extremely fast. Under normal circumstances, they could fire four or five rounds a minute. Under the maximum output, they could fire ten rounds a minute, which was very terrifying.

"Bang, bang, bang, bang, bang, bang, bang, bang, bang, bang, bang, bang!"

The roar suddenly resounded throughout the world.

White smoke is curling.

Muzzle flames burst out.

At this time, on the mountain ridge above the right side of Liangshan Pass, Guo Shengyi was still watching from the top of the mountain, wanting to see what the Song army, which had been silent for several days, was doing.

He actually didn't quite understand why the Song army persisted when it was obvious that they couldn't break through their pass?

If he was a member of the Song army, he would definitely choose to take the long route through Beifu. Although they also deployed heavy troops there, there were many forks in the road on the Beifu side, some of which even led directly to Ruyue River.

If the Song army went that way, they might have a chance. But if they went this way, not to mention that the Song army only had a few tens of thousands of soldiers, even if it was a 200,000-strong army, it would be defeated.

I really don't understand why the Song army did this.

But it doesn't matter if he can't figure it out. Guo Shengyi thinks that since the Song army is so stupid and chooses this way of hitting the wall, why not do it?

So he stood on a high platform on the top of the mountain and continued to look out, his eyes scanning the Song army camp and the mountain top occupied by the other side.

Why did the Song army leave the camp?

Guo Shengyi saw a large number of Song soldiers rushing out from the pass in the distance and starting to form a battle formation outside the camp.

Are they about to start attacking?

He thought.

However, Guo Shengyi did not immediately arrange troops to prepare for defense.

Because the enemy is so far away, it will take at least half an hour for them to come over. There is no need to rush, so I will just continue to wait and see.

Why do I see white light flashing on the mountain occupied by the Song army?

Guo Shengyi was confused.

Is that a mirror?

He had no idea what was happening on the Song army's side.

The other party acted as if they didn't understand military affairs.

Attack the heavily guarded pass.

Camp in areas with limited water resources.

Still installing a mirror on the top of a mountain?

What's going on?

Guo Shengyi's mind was full of question marks. Could it be that the Song army general on the opposite side was a fool?

He didn't understand what was going on, so he just kept reading.

A few seconds later.

A huge sound was heard, and white smoke rose from the distant mountains.

Immediately afterwards, hundreds of black balls drew a brilliant arc in the air and smashed towards the Vietnamese troops at the pass.

What is that?

Guo Shengyi stared blankly.

This was the only thought that flashed through my mind.

But after only two or three seconds, Guo Shengyi knew what it was.

"Bang bang bang bang!"

Those black balls fell into the Vietnamese camp behind the pass and exploded instantly.

A large number of Li Dynasty soldiers were still taking a nap. They heard a huge roar in their sleep, which scared everyone.

"What's going on?"

"The earth dragon has turned over, the earth dragon has turned over."

"Run, run!"

Various kinds of Chinese are mixed with the local dialect of Annan Jiaozhi and even some unknown language.

But all the languages ​​reveal one meaning - fear.

No one knows what happened.

Judging from the sound alone, it was as if there was an earthquake, filling every Dai Viet Ly Dynasty soldier with panic and fear.

Many of them didn't even have time to put on their clothes and ran out of the camp in a panic. Before they could see what was happening, they felt dust and smoke everywhere, gray fog filled the air, and there was a strange smell in the air.

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