Short video spoiler history: The beginning of modern warfare

Chapter 12: Defending the Yangtze River requires defending the Huai River

The scene on the sky changed again, and it turned out to be a classroom. There were only two boys and two girls in the video.

In the 15th year of Jian'an, everyone in Nanjun Zhi'an County looked at each other when they saw the desks and the ground were piled with books.

Before, they had seen books made of paper in the sky, and had discussed this matter before, making many assumptions and deductions. One of the conclusions was that later generations improved the papermaking technology, allowing paper to be used.

It now appears that the speculation was completely correct.

Liu Bei rubbed his hands excitedly when he thought of the many benefits that paper promotion would bring.

But what is the direction of improvement?
With doubts, everyone continued to read on.

Pang Tong asked the carpenters to draw the tables, chairs, etc. in the canopy. Due to its simple structure, several carpenters carefully looked at it for a while and easily drew the structure.

This was a simple division of labor after he and Zhuge Liang discussed it. After all, sometimes there were too many things involved in the sky curtain, and the key points needed to be recorded. It was meaningless to record things repeatedly, and it would only waste manpower and resources.

Since the shooting distance is too far, the video has no original soundtrack, only cheerful music and text description.

[In the picture, a boy is holding a balloon and is about to perform magic for the girl in white in the front row.]

[The girl in white first scanned the bottom of the balloon to make sure there was no transparent thread tying the balloon]

[The boy asked the girl to blow into the balloon, and the girl in white did so]

[The boy then takes the balloon back in front of him and rubs it back and forth, pretending to perform a magic trick]

[Then he let go of his hand, and the balloon really floated in the air]

[Girl in white: Ah???.jpg, then called out to the girl in black sitting next to her! ]

[The girl in black turns around: Huh? ? ? ? .jpg]

[The girl in black slapped the table and praised him highly, and the two girls cheered and applauded! ]

[The boy waited for a while before taking back the balloon, and smoothed his hair to act cool. Only his deskmate had seen through everything and smiled without saying anything]

Zhang Fei: Huh???

Liu Bei: Huh???

Guan Yu:? ? ?
Zhao Yun: Huh???

Pang Tong: Huh???

Zhuge Liang: Huh???
Ma Liang: Huh???

The people in Yecheng and Moling were also confused.

Wow, is this really magic?
Someone in the comment section took a screenshot of the girl in black slapping the desk in a bold move and commented on it.

《Oh my, brother!》

《Brother, sister Ao will leave the light on for you! 》

The Man in Black: Oh my, you are so strong, bro

Why can you send voice?

Cao Cao and other camps couldn't understand many of the jokes, but the way they were expressed made them feel familiar, because Yecheng was too close to Yan and You states.

"I thought it was static electricity at first, until I saw the fan"

Everyone suddenly realized what was going on, because at the end of the video the boy made a small gesture with his left hand to take the small fan off his leg.

It turns out that thing is called a fan. As the obvious idea goes, it should be something that can automatically blow air to drive away the heat?
During the Zhenguan period of the Tang Dynasty, the people of Chang'an wiped the sweat from their foreheads and were filled with envy when they heard a literate gentleman guess the function of a fan.

The strong sun in July and August is really poisonous!
Li Shimin was also envious. Although he was the emperor, it was the first time he had seen such a good thing in his life.

It’s just like when people in the south see snow, they can only look at it but not touch it. That would be uncomfortable for anyone who sees it.

It’s not that the fan really has any great use, but this little thing that can automatically fan without human intervention is indeed a clever device, and the way it works is quite curious.

Moreover, with it, there would be no need for palace maids to fan the room when reviewing memorials in the hot summer. If it were to be popularized, it would indeed save a lot of manpower and material resources.

"Study hard and read carefully, 50% understanding + 50% disdain = a lifetime of loneliness, the picture shows the expression of the boy's classmate who has seen through it"

"No, I have to show it to my daughter, so she won't be cheated by the boy [crying]"

"Elementary school student: The balloon is blown up by a fan; middle school student: The buoyancy of the balloon is greater than gravity; college student: There is something dirty!"

"We college students also saw the fan. Okay, we college students are just useless, not blind [covering face]"

During the Hongwu period, Zhu Yuanzhang looked at the words "primary school, middle school, and university" and fell into deep thought. This was obviously the standard for running schools and education in later generations, so he called out the name of Hanlin scholar Song Lian.

Song Lian, who is already in his sixties, is energetic and responds calmly. There is no way to deal with this boss, and no subordinate dares to be careless.

This Song Lian was naturally the one who later wrote the famous ancient Chinese prose "Preface to Farewell to Ma Sheng of Dongyang".

"People who know how to show support are really handsome, okay?"

"It's great to be young!" Liu Bei looked at Zhuge Liang, then at the sky, and said seriously.

The sky screen switched to a blue ball.

As the camera slowly moves forward, the entire topographic map of China appears, with a clear view!
!!!

During the Zhenguan period of the Tang Dynasty, Li Shimin was so shocked that he stood up!
At the end of the Han Dynasty, everyone was so frightened that their faces turned pale!
What we are standing on is a ball?

impossible! Absolutely impossible!
During the Hongwu period, Zhu Yuanzhang was much calmer.

There were many speculations about the structure of the universe in ancient China. The most important theories, in chronological order, are "Gaitian Theory, Huntian Theory, and Xuanye Theory."

The Xuantian Theory is the astronomical theory that is closest to the real structure of the universe. It was proposed during the Kaiyuan period of the Tang Dynasty.

As for Xuan Ye, he naturally knew about it, but that was all he knew.

He had neither the time nor the inclination to take the time to understand, because he didn't care.

[Why is the Yellow River not as effective as the Yangtze River and the Huai River in resisting foreign enemies? ]

As the commentary continued, the camera zoomed in again and marked the Yellow River with a solid yellow line.

[First, if you use the Yellow River as a line of defense, it has two obvious disadvantages]

[1: Easy to freeze]

[Qinling-Huaihe is China's 1°C isotherm in January, which means that the rivers south of the Huaihe River are almost never frozen all year round]

[The rivers north of the Huaihe River basically freeze in winter]

[Once the Yellow River freezes, the so-called defense line will be meaningless] "Isotherm!"

At the end of the Han Dynasty, it was the first time that people in Nanjun heard such a statement. They could not say anything about it and could only bury their heads in copying.

There are also words like temperate zone and subtropical zone on the sky, which are words I have never heard of. I think they were created by later generations.

[Li Bai's poem "Hard to Travel" says: I want to cross the Yellow River but the river is blocked by ice, and I want to climb the Taihang Mountains but the mountains are covered with snow]

[It refers to the freezing of the Yellow River in winter]

[2: There are too few tributaries of the Yellow River]

[The yellow lines on the map are all the tributaries of the Yellow River]

[Then compare the tributaries of the Yangtze River (green) and the Huaihe River (blue). It can be clearly seen that the tributaries of the Yellow River are few and short, and cannot become strategic channels.]

In the sky video, the tributaries of the Yangtze River and the Huaihe River are marked with green and blue lines respectively.

From this we can see that the south is densely covered with water networks.

In the 15th year of Jian'an, in Nanjun, everyone looked at it and was stunned. How to describe this?

In Yecheng, Cao Cao showed a greedy look on his face!
This map can be zoomed in and out, and it also marks mountains and rivers.

And things like subtropics and isotherms.

What a good thing!

[In ancient times, rivers were usually good transportation channels, saving time and effort]

[The Grand Canal of the Sui and Tang Dynasties and the Beijing-Hangzhou Grand Canal are successful examples]

[It is hard for you to imagine that the southern defenders can easily take away their troops and food supplies.]

[When it was transported by water from Wuhan, Jingzhou, and even Nanjing, thousands of miles away, to Xiangyang City]

[What a complicated mood the soldiers attacking from the north had]

[Compared with the tributaries of the Yangtze River, the Huaihe River has a denser network of waterways and is a natural line of defense]

[The crisscrossing water network can effectively block the attack of cavalry]

[Like the Mongolian cavalry that marched westwards and reached Europe, but faced with the Qinling-Huaihe defense line of the Southern Song Dynasty, they were very worried]

As the voice narrated on the sky screen, a huge monster spanning the Eurasian continent was marked with a red block.

Even Li Shimin, who had been invincible on the battlefield all his life, felt suffocated.

The Mongol Empire in the sky spanned Northeast China, North China, Mobei, Tibet, Western Regions, Central Asia, West Asia, Eastern Europe, etc., with an effective area of ​​3300 million square kilometers. (Area of ​​Russia: about 1710 million square kilometers)
The Southern Song Dynasty (presumably a later dynasty) in the sky could only defend the Qinling-Huaihe defense line and tremble in fear.

The difference in their land areas is simply unbelievable, and the disparity in national strength is even more so.

But is this the Europe mentioned in the sky? What is the southern part of Europe called?
Western Han Dynasty, Yuanshou period.

Liu Che looked at the huge red monster in the sky, and even though many years had passed, he couldn't help but break into a cold sweat for future generations.

But at the same time, I was also surprised that the world is so vast!

There is such a large territory to the west. I remember it was said in the sky not long ago that when Qin Shihuang unified China, Europe was still as broken as rubble!
This is Europe!!
There is another vast territory below Europe, which is even more vast than the Central Plains!
it is good!it is good!it is good!
The northern barbarians have evil ambitions and have caused harm for a thousand years. They should be killed!
[If attacking head-on, the cavalry will need to cross many rivers along the Huai River]

[At this time, if the Southern Song Dynasty sent a small group of soldiers to constantly harass and intercept the Mongolian army's logistics, its front line would be tight]

[If you take a detour, there is the sea to the east, Dabie Mountains in the middle, and Qinling Mountains to the west]

[There is an iron-clad Xiangyang City in the middle passage that cannot be taken down]

[Moreover, the Qinling Mountains and Huaihe River defense lines only require very few troops to support the entire defense line]

[That’s why there is a saying that “to defend the Yangtze River, one must defend the Huai River”]

In the 15th year of Jian'an, many generals were shocked.

In this age when having enough to eat is considered a luxury, there are many generals who lead troops to fight, and quite a few who can be called famous generals, but those who can be considered strategists and military advisors are indeed rare.

There is no other reason. There are not many people who can read and write, and even fewer who have this kind of knowledge.

Without the corresponding insights, there is naturally no way to talk about strategy.

And knowledge is either hidden in books or under your feet.

Videos like the one in the sky that uses a country as a chessboard and uses modern high-precision topographic maps to conduct attack and defense drills and explanations are truly eye-opening for them!
The generals of Jiangdong, Nanjun and Cao Wei camps all had more or less their own understanding of the "geographical advantage" in "the right time, the right place and the right people".

"I finally understand why the Southern Song Dynasty always fought in Xiangyang! A map of the Huaihe River tributaries is clear and simple!"

Guo Jing failed to defend Xiangyang and died for his country. The loss of Xiangyang led to the fall of the Southern Song Dynasty.

"In history, it was Lü Wenhuan who defended Xiangyang, okay [speechless]"

"After Xiangyang, the Jianghan Plain to the south is flat and has no strategic locations to defend. We can directly attack the Yangtze River."

"Baldhead thought the same thing back then [doghead]"

Li Shimin was already accustomed to the sharp tongues of later generations. After all, they were a group of "outlaws" who did not even take the emperor and the royal family seriously.

《Him? The whole city wants him. It's hard to be bothered by him. And there are many factions under him.》

"The principal's economy has collapsed, and I am the one who is reaping the benefits [covering my face]"

You should find out what he hasn't done wrong.

"Behind the natural barrier of the Yangtze River is the iron wall of Jiangdong [dog head]"

"I Will Definitely Give You Rave Reviews [狗头]"

《Can this be steamed?》

"This is the thinking during the cold weapon war. In modern warfare, there is no absolute front and rear. The enemy's capital is the front line [dog head]"

Chen Li thought this point of view was quite interesting, and seeing that no one had responded to him, he responded.

"The developed areas are the frontline, and the backward areas are the rear [狗头]"

In fact, what they both meant was pretty much the same.

In the vast space and time, everyone suddenly realized that this was how the discussions in the sky came about, and they were displayed as soon as they were spoken.

Li Shimin was jealous again. How great would it be to use this thing for wartime command?

What a spendthrift!
(End of this chapter)