It is a very esoteric knowledge, and it is also a trick that has been proposed early in the art of war.

"The Art of War: The Passage of Use" has a special commentary on it.

In thousands of years of history, the word spy has never been severed. As far as the Ming Dynasty is concerned, the most conspicuous ones are Xu Zengshou (Dingguo Gong) and Li Jinglong in the Battle of Jingjing.

Li Jinglong, who once led an army of 500,000 to conquer Zhu Di, became the first hero of Jingnan after the war. Every major event discussed in the imperial court, Li Jinglong is at the head of the train, isn't it ridiculous?

However, time flies, and by the end of the Ming Dynasty, the Ming Dynasty, which claimed to be a civilized person, was repeatedly defeated by the barbaric Manchu Qing Dynasty in wars.

When the old slave, Houjin was not good at attacking the city, every time he took the big city, he took the details first, first hid the details, and attacked the inside from the outside, Fushun, Qinghe, Kaiyuan, Tieling, Shenyang, Liaoyang, and Guangning were all the same. Its emphasis on meticulous work is far above my Ming. It is reported that only one day after the slave soldiers conquered Shenyang, they sent meritorious spies to Liaoyang, and some gentry in Liaoyang had something to do with Jiannu, and brought slave spies into the city in the name of domestic servants. As a result, when Jiannu attacked the city, there was a fine work that detonated the powder magazine of Xiaoximen, and fires broke out everywhere, and the city became chaotic, and the city fell.

This has to be very emotional. At the end of the Ming Dynasty, whether the quality of those civil and military officers was high or low, and did those scholars and doctors who were in charge of military power really read the book in their hearts?

And after Zheng Zhilong fought with the Manchu Qing Dynasty, the Zheng family had already become a thorn in Dolgon's side, not only in Jinmen, Denglai and other places, but also in Quanzhou in Fujian, and now I don't know how many people are lurking.

Outside a small alley in Jinmen City, a middle-aged man who was selling chaos at the mouth of the alley would hug him in a low voice while looking for change for customers: "The merchant has already walked by, if it's good, the news should have spread." ”

The middle-aged man kept silent when he spoke, but it was the guest who grabbed a handful of copper in his hand and whistled softly. There was a sound of loud footsteps, and people who had not known to be hiding there before poured out, twenty or thirty people.

"Get to work!"

It's not the first time he's done arresting someone. Each of the twenty or thirty people behind him was experienced. A group of people quickly blocked the front and back of a nondescript mansion in the alley. And then unceremoniously break in!

The screams and chaotic sounds were loud and loud, but in the time of half a burnt incense, the people in the house were captured.

How difficult it is to completely eliminate the details of the Tsumen.

However, Jinmen Castle has its own unique location, it is a military town, and internal and external information is not smooth. You can't clean it internally, but what about externally? As long as you pay attention to the passages that can be accessed by the outside world, sooner or later you will be able to find out the pests.

When Zheng Hongkui received the news of the Black Ice Terrace, he smiled unconsciously. It's better to focus the attention of the Tartars on Yanjing, so that it will be much easier for them to go to Shanhaiguan.

The latter is no longer Wu Sangui's lair.

After the Ming Dynasty's Ping Xibo surrendered to the Tartars, the Manchu Qing gave him great preferential treatment, and the entire Liaoxi Corridor fell into the control of the Guanning army like a fief. And Shanhaiguan naturally fell into the hands of the Tartars.

Is this an exchange?

One or two hundred thousand Liao people who were relocated to Luanping by Wu Sangui have returned to their hometowns.

It seems like everything is so good.

Although it took a bit of time, Mandahai really took control of Shanhaiguan in the middle of last year.

However, this Liaoxi Corridor is really not a treasure of feng shui, there is Juehua Island on the side, in order to deal with the threat of the Zheng army, Wu Sangui left nearly 20,000 soldiers here.

This is Dolgon wanting to borrow the Wu family to resist Zheng Zhi's dragon army, but it is not Dolgon borrowing the Zheng family's hand to suppress Wu Sangui.

Zheng Zhilong can't see Wu Sangui's dog head. But he felt that it was necessary for him to fight in the Liaoxi Corridor, and at the same time to see if he could take Shanhaiguan.

The latter's unique topography gives it all the conditions to become a fortified fortress. And close to the sea, logistics are smooth. As long as it can be taken and cleaned up a little, this place can become an impregnable fortress.

It is more able to make a good cut of the tartar inside and outside the gate!

Zheng Zhilong has been aiming at this place for a long time, but he used to play chess pieces in Jinmen and Denglaib, so it is always necessary for these two places to be stable before he can have the spare strength to run other places, right?

"In that case, I will set off (Zheng Zhipeng), then I will set off." Zheng Hongkui said a word, and didn't look back. Only Zheng Zhipeng was left behind him with envious eyes.

In the end, they are siblings, but they are different. Zheng Hongkui first had the merits of sitting in Fujian, raising the people, supplying military supplies, and giving food and soldiers, which can be compared with Xiao He's merits. Although Zheng Hongkui is facing a situation that is many times better than Xiao He doesn't know.

And now as soon as he leads the troops, it is 30,000 people, 100 warships, 100 auxiliary ships, and it is mighty.

The first battle was to fight Shanhaiguan, or to play raids, and even to take advantage of the weakness.

If such a war can still be defeated, Zheng Hongkui is really not as good as a pig.

A few days had passed in the blink of an eye, and the Manchu Qing Dynasty received the news that Zheng Zhilong had gathered the cao ships in Jining at the same time as receiving the information from Jinmen. Although they felt very absurd, Turai, Turg and others still raised the possibility of preventing Zheng Zhilong from going north along the canal.

It was followed by the news that Zheng Hongkui led the sea and land army to kill Jinmen.

Zheng Zhilong also led the army north, connecting the men and horses brought by Zheng Hongkui, as well as the original soldiers and horses of Jinmen, which really cannot be underestimated.

If Azig's horse army still stays in the Central Plains, and the soldiers and horses outside the pass are still stationed outside the pass, and Zheng Zhilong leads the army to attack Yanjing, then Yanjing's soldiers and horses are really difficult to resist.

But is it time to draw Azig and the soldiers and horses outside the gate? Isn't that child's play?

When the combat effectiveness of its own soldiers and horses could not have an advantage on the battlefield, the Manchu Qing Dynasty now also realized Zhu Ming's discomfort at the beginning.

Every time you fight against an enemy who is far inferior to your own in numbers, you must maintain absolute superiority over the enemy's forces, so that you dare to come forward to fight, this is really a quick repayment of the debt in June.

Now it's the Tartars' turn to gain and lose.

"Outside the gate is our ancestral land, the imperial court moved south, and the land of thousands of miles is already empty, if the troops are transferred again, and the Zheng army comes to harass by boat again, how can Prince Li withstand it?"

"The surplus of ten miles (land) outside the gate is not as good as the benefit of one mile inside the gate. Where to go, at a glance! ”

"It has been several years since the Qing Dynasty entered the customs, is it possible that there are still people who return to the customs to drink wind and snow in order to salvage a sum of money?"

In Yanjing City, there were discussions again and again, and Dolgon couldn't come up with an exact method. Therefore, when Zheng Hongkui led the army to kill outside the Shanhai Pass, Azig's army was still in Kaifeng, and the soldiers and horses outside the pass were still outside the pass.

Dolgon made the wrong choice, but made the right choice.

However, the cornerstone of the victory or defeat of the war is the real strength of both sides, and in the Shanhaiguan area, the Manchu Qing Dynasty even had eight banners and green flag soldiers, and there were only 5,000 people in total. The artillery at the pass was also dragged away, how could they be the opponent of the 30,000 Zheng Army and the Land Division?

"Send someone to tell Shi Fu to let the plywood ship come forward. Smooth out the cannon of Ninghai City for me. ”

Zheng Hongkui led the ship straight outside Ninghai City very domineeringly, which is also known to later generations as the old dragon head. It is a small city in the easternmost part of Shanhaiguan near the sea.

The huge scale of Shanhaiguan is called a pass, but in fact there are as many as seven cities before and after. From the Bohai Bay in the east to the Jiaoshan in the west, by the mountains and the sea, with the Great Wall as the main line, with the Guancheng as the center, including many acropolis, passes, dozens of city platforms, enemy platforms, beacon towers, etc., is a complete military defense complex.

To the west of Ninghai City is the South Wing City, and then to the west is the square Shanhaiguan City, and there are East and West Luo Cities in the north and south of the Guancheng, and you can completely regard the latter as the outer city of Shanhaiguan City. There is also Weiyuan City in the north of the city, a small fortress, standing on the Joy Ridge.

Between Ninghai City and the South Wing City, there are two sentry cities.

The so-called sentry city refers to the independent small fortress outside the city.

And the Guancheng of Shanhaiguan is further west of the North Wing City and Jiaoshan Pass, and even the Yudao Pass and the Flood Pass that go further west, Zheng Hongkui doesn't care.

Because he doesn't have to care about those. Is he ready to divide his troops to seize those places, he just needs to take the city and clean up the two Tartars here, and everything will be complete?

In the south of Ninghai City on the coast, on that flat open space, a wharf that has been abandoned is once a point of the Liao army's seaborne grain.

Now Zheng Hongkui has also taken a fancy to this and is ready to use it as a dock for the army to land. And as long as the few artillery pieces at the head of Ninghai City are swept away, the Tartars will not help even if they hoard more soldiers and horses in Ninghai City.

Bows and muskets can't reach the harbor.

The three large plywood ships are clearly happy to show their skills here.

The captains of the three warships all laughed loudly when they heard the same order, they loved the war to death.

Unfortunately, since the war with the Dutch, they have not faced a real opponent. As for North Korea and Japan, it's just a petty fight.

As there are more and more large plywood ships in Zheng Jun's sequence, they are less and less useful, either stopping at the port wharf or going to patrol and patrol in the South Seas.

This time, with the fleet going north, it was only used as a deterrent - against Jinling, and they were rarely used. Wouldn't it make them happy to be able to hold a fight now?

"Brethren, all of you move, all move. Let the other brothers see our majesty. ”

No one looked at the few artillery pieces in Ninghai City. The Manchus transported most of the artillery at Shanhaiguan, and the rest of the artillery, that is, was concentrated in Ninghaiguan, and it could not withstand the number of guns carried by any of them.

The head of Ninghai City, which is three zhang high, is densely covered with soldiers, and the flag is displayed. Especially at the fort, the third-class Meljang Jingzhuo Butai personally sat in the town, and the flag was erected high at the top of the city.

As Aobai's younger brother, Zhuo Butai is very proud of his brother.

Before his death, Ao Bai was a famous warrior of the Manchu Qing Dynasty.

Zhuo Butai knew that he could never match his brother Aobai by force, but he had a heart that was no worse than Aobai.

The sun completely dispelled the morning mist, the sea surface was sparkling and scaly, seagulls swept by from low altitude, and in the distance, you could see the white sails that rose and fell with the wind and waves, and the shadows were full of shadows.

"Master! The Zheng thief sent three foreign ships. ”