Gong'an City was originally a small city, but since Liu Bei used it as his administrative center, he has spent a lot of manpower and material resources to expand it.
Liu Bei's specific expansion measure was to build four tall city walls again a few miles outside the original public security city wall.
Therefore, Gong'an City is actually guarded by two tall walls, and is divided into an inner city and an outer city by these two walls.
After Guan Yu came to rule Jingzhou, he also adopted the methods of his good brother and expanded Jiangling City like a public security city.
After Liu Bei's expansion, the area of the Public Security City was twice as large as the original. Not only that, Liu Bei also focused on the expansion of the moat outside the Public Security Outer City.
The moat, also known as the moat, is mostly a manually dug river surrounding the city wall.
It is mainly used for defense and can effectively prevent enemies or animals from invading.
Under Liu Bei's expansion, the moat surrounding the entire Public Security City was huge, with an average width of forty meters!
Mi Yang stood by the moat outside the east gate of the Public Security City, looking at the wide moat that spanned between him and the Public Security City Wall.
For the first time, he felt a little small.
Not only did he feel a sigh of relief in his heart,
This is a river.
In her previous life, Mi Yang watched ancient war movies. The moat in the movie was very narrow, so narrow that it seemed like an adult could cross it in one step.
At that time, he had doubts.
This can't be called a river, but it can be called a ditch.
Did ancient people rely on these simple protective measures to protect their homes?
When he came to ancient times, he discovered that it was not the ancients who were stupid, but later generations who simply failed to take pictures of real moats.
A moat was built around the city, but it was not equally wide on all sides.
Because the east city wall is adjacent to Lukou, a strategic military town in Jiangdong, the moat on the east side outside Gongan City is
At a glance, Mi Yang saw that it must be at least fifty or sixty meters wide.
Although it is winter now, the whole land of Jingxiang is in the fresh water season, so the water in the moat outside the Public Security City is not deep.
But the average depth has also reached three meters.
Only this is worthy of the words "Jincheng Tangchi, Deep Ditch and High Fort".
The reason why Mi Yang came here specifically to inspect the moat outside the Public Security City today was because of Yu Jin's suggestion.
I saw Yu Jin, who had a majestic appearance in the past, now squatting on the ground like an old farmer in the countryside.
He carefully picked up a handful of loess on the ground, put it to the tip of his nose and smelled it carefully.
After smelling it, Yu Jin took another spear and stabbed it into the ground under his feet several times.
I saw that under Yu Jin's huge force, the sharp tip of the spear was just a little bit deep into the ground.
Seeing this scene, Yu Jin, who awakened his farmer skills, finally had a satisfied smile on his face.
Mi Yang looked at Yu Jin's gesture of planting rice seedlings, and Zhang Er was confused.
Even if we need to transplant rice seedlings, the season has already passed.
Is it possible that this guy hasn't recovered from his madness the day before yesterday?
After Yu Jin finished everything, he came to Mi Yang and said to him,
"The person responsible for expanding the Public Security City is really talented!"
"May I ask the chief clerk who was in charge of the construction of this new public security city?"
Yu Jin seemed to admire that man very much, with a look of admiration on his face.
If you were someone else, you might think that Liu Bei was responsible for building the Public Security City.
But Mi Yang's identity was unusual. He knew that Liu Bei only had the idea of rebuilding the Public Security City.
But the person who actually executes and is responsible for the overall construction work,
Actually it was Zhuge Liang.
Mi Yang saw that Yu Jin greatly appreciated the person who presided over the construction of the public security city. He looked up proudly and replied,
"He is my master, Duke Zhuge of Wolong."
Mi Yang's statement that Zhuge Liang was his mentor was not an empty lie.
When Mi Yang was in Chengdu, Liu Bei felt deeply that his eldest son Liu Chan was growing up.
In order to help Liu Chan enrich his wings and make Liu Chan successful in his studies,
Therefore, Liu Bei appointed several great sages of the time to be Liu Chan's teachers, including Zhuge Liang and Fazheng.
As the second generation of the Yuan Cong sect, Mi Yang, Guan Xing, and Zhang Bao were appointed by Liu Bei as Liu Chan's attendants.
In order to study together with Liu Chan.
Under this relationship, after rounding off, Zhuge Liang can be regarded as half of Mi Yang's teacher.
When he heard that the person in charge of building the new public security city was Zhuge Liang, Yu Jin's face showed a look of surprise.
It turned out to be him. No matter how well the public security city was built, it was not surprising.
As the number one hero who assisted Liu Bei's golden scales to transform into a golden dragon, Zhuge Liang's name has long been known to everyone.
After hearing that Mi Yang was actually Zhuge Liang's disciple, Yu Jin couldn't help but feel better about Mi Yang.
A sudden realization dawned on Yu Jin's face, and the clever Mi Yang discovered something. Why did Yu Jin praise Zhuge Liang without hesitation after inspecting the moat of the Public Security City for a week?
Is there any secret in it?
Mi Yang was not ashamed to ask. He asked Jin,
"Is there any ingenuity in the new public security city built by our division?"
"I hope Wen Zegong will not hesitate to teach me."
Yu Jin was surprised when he heard Mi Yang calling himself Wen Zegong.
In the past half month of following Mi Yang, the most polite thing Mi Yang has done is address him by his first name, but he has never addressed him respectfully.
Yu Jin looked at Mi Yang with interest.
This kid is finally pleasing to the eye.
Yu Jin thought that if he could not return to the north in the future, staying under Mi Yang would be his best choice.
So the sooner Mi Yang grows up, the better for him.
With this in mind, Yu Jin is very willing to be Mi Yang's teacher for once today.
Yu Jin said to Mi Yang,
"Since ancient times, attacking the heart has been the top priority, and attacking the city has been the bottom priority."
"Due to the Lord's generous act of kindness and trust the day before yesterday, there is no need to worry about guarding against the enemy's attack."
"The top priority is to be prepared for how the enemy will attack the city, so that we can strike first and be prepared for everything."
"There are many soldiers in Jiangdong and there are many generals, and Lu Meng is a famous general with many years of experience. I predict that his first step in attacking the city will be
They must send out a large number of soldiers to surround the public security city, cut off the inside and outside of the main office, in order to disrupt the morale of the main office's army. "
"The chief has a fortified city to rely on. If we attack by force, the Wu army will suffer heavy losses.
Therefore, according to my experience, Lu Meng will first build mountains and camps, and secondly, secretly make tunnels to facilitate his attack on the city. "
"And if we want to prevent Lu Meng from succeeding, the key lies in the moat."
"The moat is wide, so Lü Meng's efforts to carve out mountains and barracks and attack the city with rain of arrows will greatly reduce the effectiveness."
Mi Yang understood what Yu Jin said after thinking about it.
Building mountains and hills, and having his soldiers climb high and shoot arrows to kill the city wall defenders were common siege methods in this era.
But now the average width of the moat outside the Public Security City is more than 40 meters.
Moreover, the moat is thirty meters away from the city wall, which means that even if the Wu army camped beside the moat,
You have to be more than 70 meters away to shoot an arrow at the city wall.
One step in the Han Dynasty was about 1.3 meters in modern times, so a length of more than 70 meters was approximately equal to more than fifty steps in the Han Dynasty.
In the Han Dynasty, when the enemy's bow and arrow were fired more than fifty steps, its lethality was actually greatly weakened.
Therefore, it was said that the efficacy was greatly reduced at the end of the ban.
