The Gongsun clan of Liaodong made a fortune in Gongsun Du, and this gentleman was recommended by Xu Rong, a fellow villager, and was appointed by Dong Zhuo as the county guard of Liaodong.

Because he served as a county official in Liaodong in his early years, he was despised by the powerful and large families in the county.

Gongsun Du then destroyed more than 100 Haoqiang, and successively attacked, subdued Fuyu, Goguryeo, and went west to conquer Wuhuan, recruited the displaced people to accumulate strength, and dominated Liaodong, when he was the hero of the Eastern Kingdom.

It's a pity that Gongsun Du died in his fifties, and his son Gongsun Kang was even more ferocious, capturing the repeated Goguryeo capital, suppressing Samhan, and setting up Obibang County.

Without waiting for Gongsun Kang to show his strength, he died young, died in the prime of life, and his second son was replaced by his younger brother Gongsun Gong at a young age.

Gongsun Gong was unable to have children due to illness and amputation, and his health was not good, so he could not actively expand to the outside world like his father and brother, and he was a man of success.

Up to now, Gongsun Kang's two sons are gradually getting older, and Gongsun Gong has no children, so the Gongsun clan in Liaodong is on the verge of civil strife at any time.

The Wei State has a system of appointing sons, which is inherited from the Han Dynasty, that is, after serving as an official at the level of 2,000 stone for three years, one of the sons can serve as a Lang official. Gongsun asked to surrender to Cao Wei, and Gongsun Du naturally did not feel sorry for his two young nephews.

Therefore, the eldest nephew Gongsun Huang was a Lang official in Yedu, and the younger nephew Gongsun Yuan stayed in Liaodong.

Now Gongsun Du and Sima Shi led more than 10,000 cavalry to Yedu...... If the news is true, then what really happened there in Liaodong?

Sima Yi also wanted to know why, obviously deceived Gongsun Duyu out, but when his vanguard arrived at the Liao Tunnel, it was already ready for war.

Fortunately, Liaodong's preparations were not sufficient, and the defenders of Liaodong were less than 10,000.

And Sima Yi's six towns of Youyun were the first to mobilize, marching separately, and converging at the Liao Tunnel where they must pass.

The combat style of the soldiers of the six towns of Youyun has the custom of plundering and the tradition of eating the enemy.

In the face of the natural danger of the Liao Tunnel, it is an insurmountable natural danger for the Central Plains system, which relies heavily on logistics and heavy infantry tactics.

Because the area around the Liao Tunnel is a large area of swamps, boats and ships cannot transport grain, and the roads are unstable, so logistics and transportation are very difficult.

In order to capture the Liao Tunnel, it is necessary to continuously transport supplies, which is a great consumption of national strength; If the Liao Tunnel is not captured, the logistics supply line will be stuck by the Liao Tunnel, and other armies will not dare to cross the Liao Tunnel to attack the hinterland of Liaodong.

All this, especially the natural danger of the Liao Tunnel...... It is aimed at the Central Plains military system and tactics that rely on logistics.

But the six towns of Youyun are different, leaving a part of the army to garrison the confrontation, and the main force crosses the Liao Tunnel to attack, plunder, and destroy the hinterland of Liaodong.

Seeing the division of troops in the six towns of Youyun, where did Gongsun Yuan, who was stationed in the Liao Tunnel, dare to trap and defend the lonely city, otherwise after Liaodong was destroyed and lost its supply source, the defenders of the Liao Tunnel could only eat people in the city wall.

As a last resort, Gongsun Yuan, who had not yet straightened out Liaodong, could only go out of the city with extreme anger and try to fight head-on, hoping to defeat this Han and Hu army from afar.

Naturally, Gongsun Yuan's head was placed in front of Sima Yi.

He inspected the harness of Gongsun Yuan's personal guard in detail, and saw that the stirrups on both sides had been installed, but the saddle was still an old-style saddle, which made him feel very anxious.

This militaristic weapon is spreading to the surrounding area at a rapid speed, and the poor areas in the north of the desert are inhabited by nomadic tribes like Ding Ling; What kind of changes will these Xiongnu other tribes bring after they obtain new harnesses and innovate cavalry tactics?

In the north of the Great Xianbei Mountain, there are still many barbarian tribes living in the primeval forest.

The entire Liaodong is at a critical moment of transformation in all aspects, like a quagmire.

If Gongsun Du and Gongsun Kang father and son could each live for more than ten years, and Gongsun Kang could live until now, Liaodong would have been straightened out long ago and become a powerful country in the East.

It was precisely because of their early death, as well as the incompetence and fettered rule of their successor Gongsun Gong, that the Goguryeo, Zhuhu, and Korean natives who submitted to the Gongsun clan acquired the Han iron smelting skills, as well as agricultural and textile skills.

If you want to gain a foothold in Liaodong, you must be prepared for a long-term war in the future; After the Hu, barbarians, and mountain and forest savages are almost cleaned up...... I'm afraid that Beifu has also completed the recuperation of the Central Plains, and then it will have to face the offensive of Beifu.

Sima Yi sat quietly in front of Gongsun Yuan's head and pondered this question, whether he wanted to dedicate the well-run Liaodong to the new dynasty; Or take the population and technology to Yingzhou to win an extraordinary opportunity?

He looked down at his palms and arms, he was more than eight feet tall, his arms were strong and powerful, and his ancestors were also generations of soldiers.

If you hunt demons, swallow the flesh and blood of demons...... There is no chance to fight back to the Central Plains and compete for male and female.

No matter how bad it is, and the remoteness of Yingzhou, it is impossible for the government soldiers to chase after it?

If you don't govern Liaodong by yourself, with the current situation in Liaodong, it is bound to be Goguryeo; It seems to be the best policy to support Goguryeo and make Goguryeo rely on the natural dangers of the Liao Tunnel to fight against the government soldiers to buy time for themselves.

What if Goguryeo doesn't use it?

After thinking about it repeatedly and determining the specific goals for the future, Sima Yi began to write the song "Please Move Liao Tu Shu Discussion": "The Marquis of Chen'an Guozheng Yi, the general Yi, since he and the Marquis of Xiangping raised troops and Qin Wang, he has inspired the three armies to think that he is stamina. I was shocked to hear that the nephew of the Marquis of Xiangping was collaborating with the enemy country, and raised troops to rebel, with tens of thousands of people. Fearing a catastrophe, the country will be subjected to the enemy, so the ministers will send urgent troops, march thousands of miles in five days, encircle the Liao tunnel, and soon be able to completely determine the Liao. ”

"Liaodong has fertile water and soil, and has the salt benefits of the East China Sea. There is a natural danger of Liao Tunnel in the west, and this is also the place of the national society. ”

"Today, the old ministers of the Han Dynasty are worried about the country and are afraid that our fishermen will benefit, so they tolerate it in many ways, so that Chen Gongxin is unprovoked and almost wants to usurp the country. If the country moves eastward, the external troubles will be eliminated, and the country will be in chaos. The people are suffering, and they hope for a new lord as they hope for rain. ”

"In the past, Chen Gongxin said, 'People and lands are gained, and people and lands are saved; Gain land and lose people, people and land borrow and lose', and I hope that His Majesty will make a clear decision. ”

This is a letter to the Imperial Court of Yedu, asking the Imperial Court to forward it to His Majesty the Emperor of Great Wei.

After writing this one, he wrote private letters to Cao Pi and Cao Ei respectively; As a friend, he persuaded Cao Pi to leave a hope for the country to recover, and also to leave a way out for the Cao clan.

To Cao Ei is also to analyze the strength of Beifu in a private capacity, and persuade Cao Ei to plan the back road as soon as possible, it is better to lie dormant in Liaodong in order to plan for the future. No matter how bad it is, you can be lonely in the east, and you don't have to be a prisoner under the stairs, forcing a smile and being terrified.

A letter to Yedu...... Naturally, it will be unsealed by Yedu.

As an old friend, Sima Yi naturally knows that Sun Zi and Liu Fang are good at imitating handwriting; They can completely connect the previous and the next, tamper with the letters, give orders to themselves on behalf of Cao Pi, and can also make suggestions to Cao Pi on their behalf.

Different from the imperial court, Sima Yi and Cao Pi have other news channels.

Just now...... It is more necessary to have the manpower and material resources of the Yedu court.

Only after the three letters were sent did he begin to examine the military merits in detail and make more detailed adjustments to the officers of the various armies.

In addition to daily training, rewarding and establishing favor and prestige, there are three kinds left to control the army: winning battles, killing uncontrolled military officials, and supporting military officials who are friendly to themselves.

He has done all four of these things, and a little correction and modification will strengthen his rule over the six towns of Youyun.

But it is still not enough, there is a lack of enough local military officers and sergeants.

This defect can only be supplemented by Liaodong first.

A solution that is not a solution appears in Sima Yi's mind, which can quickly solve the current problem.

Following the example of the Northern Mansion, the Han servant system was implemented instead.

Arrest the Han people and indigenous Han people who have taken refuge in Liaodong and reduce them to their own slaves and servants!

With the support of sufficient and strong headquarters and the population of their own clan, the officials of all ethnic groups in the six towns of Youyun ...... Naturally, it is convincing and obedient.