After Zhao Yucheng led his army to the Lang Son area, he realized that the terrain here is very conducive to defense and is not conducive to offense. According to reconnaissance, the large and small hills and other places are relatively high, so he can effectively resist the Ming army's attack from a high point.

If the Ming army did not remove all their strongholds, it would be difficult for them to break through the Langsan area and continue to move forward.

There are obstacles everywhere, murderous intent and traps everywhere.

Faced with such a situation, Zhao Yucheng felt very moved.

"If this was in the past dynasties, I would have a headache when I saw this situation, and then I would use my life to pile it up. As long as I pile it down here, Nanyue will be over. That is, we can not have such worries, and we have to thank it for not raining much now, otherwise this will not be easy to do."

Zhao Yucheng sighed at the rapid development of the Ming Dynasty technology, while sighing at the beautiful weather and not raining heavily.

So the Ming army pushed the artillery and began bombardment from one stronghold and one stronghold.

If you don’t need to pile up people’s lives, use guns. If you feel that the efficiency is not too fast, then use it with Thunder God Cannon. Anyway, it is just a firepower to open the way and strike long-range. Before you can hit the strongholds of the South Vietnamese army without any power to fight back, the army should not come forward rashly.

Anyway, Zhao Yucheng made one sentence.

"Boom for me!!!"

On the first day of the war, the Ming army killed eight strongholds of the South Vietnamese Army. On the second day of the war, six more were killed. On the third day of the war, seven were killed.

The artillery opened the way, the Thunder Cannon increased its attack strength, and when there was no movement inside, the infantry pressed up, the musketeers pressed the formation, the spearmen and the sword and shield hands were mainly responsible for the harvest. Although it was an attack on the back, according to this attack mode, the Ming army won the South Vietnamese army base without any damage.

The South Vietnamese army instantly became the turtle in the pot, and they could not escape or fight.

For three days, the South Vietnamese army became the passively beaten side, but the Ming army continued to advance with extremely small casualties and gradually occupied some important strongholds in the Lang Son region.

On the fourth day, when the Ming army was pushing the artillery with the Thunder God cannon to be covered by fire, the South Vietnamese army in a stronghold could not help it. They rushed down the mountain in groups, trying to launch a strong attack on the Ming army at the foot of the mountain with a momentum of unstoppable momentum.

The hand-to-hand combat troops charged forward, and the crossbowmen fired arrows while rushing, trying to suppress the Ming army's firepower with bows and arrows, caught the Ming army off guard.

The Ming army reacted immediately, and the sword and shield hand pushed a line of defensive arrows. The musketeers followed him and raised the musket, ignited the fire, silently waiting for them to rush forward, and then closed their eyes and pulled the trigger.

There was a sound of bang, and white smoke rose into the air, forming a white smoke belt in front of the Ming army, while the South Vietnamese soldiers who rushed closer were beaten to death by lead.

After the three-wheeled musket shooting, the swordsman and the spearman pushed up and carried out a harvest operation against the South Vietnamese soldiers who could still stand and were injured and lying on the ground.

Finally, conquering that stronghold.

Only thirteen soldiers in this stronghold were captured intact. One soldier in the Ming army was shot in the arm by an arrow, and four soldiers twisted their feet, and no one died in battle.

This is the end of the stronghold that takes the initiative.

The Ming army fought for a whole day and encountered three strongholds that took the initiative to attack. The result was the same. They were hit by muskets and were completely unable to break through the defense line of the Ming sabre and shield hands and cause damage to the Ming soldiers behind them.

In the end, he was wiped out his entire army and lost his stronghold. Few people were captured by the Ming army in a hurry.

The remaining ones were still some of the Ming infantry soldiers who were guarding their strongholds and could not go out. After being covered by fire for a round, the remaining South Vietnamese soldiers could not withstand the attack at all. They were all annihilated or collapsed and surrendered.

On the fifth day, it rained when Zhao Yucheng was about to pursue the victory.

Although the rain was not heavy, Zhao Yucheng did not order troops to send troops for insurance, so that the army would focus on moisture-proofing of gunpowder and fuses, and strictly prevent them from getting damp.

Thanks to this rain, Su Xiancheng was able to breathe and finally stopped his strategic retreat and stopped in an important stronghold at the southern end of the military defense point in Lang Sang Mountain.

This was his third emergency retreat in five days. Several previous garrison sites were captured by the Ming army. If he stayed there, he would either be shot or killed by explosives. If he was even less lucky, he would probably be bombarded into a pool of meat paste.

Facing the Ming army's new firearm, he fully felt what powerlessness means.

All the tactical actions he imagined turned into nothingness in front of the Ming army's new firearms. The military strongholds that occupied the dominant terrain should have become the meat grinders of the Ming army, which should have caused heavy losses to the Ming army and fought one by one to win.

Even if it is taken, the Ming army will be exhausted and suffer heavy losses, and will be forced to retreat and give up fighting south.

This is the best ending he imagined and the most important thing to happen.

But the fact is that the Ming army used new firearms to smash the military facilities he had worked hard to set up from a distance.

According to the descriptions of some lucky survivors, the long-range strike weapons he placed in the military stronghold could not reach the Ming army at all, and it was meaningless to roll the wooden stones against the Ming army that did not go up the mountain to launch a strong attack.

However, the Ming army's firearms were able to destroy their strongholds in an extremely violent manner from afar.

The barracks collapsed and the towers collapsed. Nothing could stop the ammunition fired from the terrible firearms. Any defense facility would be completely destroyed in one blow.

Su Xiancheng collapsed and found that he had a second serious wrong prediction, which was almost impossible to occur in military operations and could not be forgiven.

It can be said that it is negligence once, but it is the second time. What else can I say?

The first time it was to destroy 10,000 elite troops, and the second time, the entire Lang Son defense zone and even the entire Liangsan Prefecture were to be destroyed.

As an old minister of the two dynasties with outstanding achievements, this will become the most unlikely defeat that Su Xiancheng has ever been accepted since he became an official, and it can almost ruin all his previous achievements.

Because once Lang Son is broken and Liang Son falls, the Ming army can march straight into Shenglong City, occupying the core of Nanyue's rule, easily shake the ruling foundation of the Li dynasty of Nanyue and destroy everything.

The efforts of the Li Dynasty's kings may be directly ruined because of this.

It was at this moment that Su Xiancheng suddenly discovered the huge advantage of a big country over a small country.

It's not just about military strength and national strength.

But it is about trial and error costs.

A great country has a vast territory and a different core. If you lose a piece of land, there are more other countries to mobilize and fight back. It is almost impossible to be defeated by a war. They have enough time to adjust their strategies and complete a brand new layout, thereby reversing the defeat.

But small countries cannot do it.

For example, if Nanyue loses the Liangzhou mountainous area, the capital will be directly exposed to the Ming Dynasty's military front, and the situation is comparable to that of the Northern Song Dynasty that lost the Sixteen Prefectures of Yanyun and the Southern Song Dynasty that lost Xiangfan. The ending is basically just one word!

If it really comes to that point...
Chapter completed!