From the geography on the sand table, it can be easily found that the boundary between the entire south and north of the country is divided into two halves by the Gobi Desert that fell from the sky.

This curtain stretches from north to south, separating the Mongolian plateau from the Inner Mongolian steppe.

The Gobi, desert and wasteland constitute the mainstream of this region.

But it's not an absolute death zone either.

Otherwise, nomads would not have been able to move back and forth between the south and north of the shogunate for thousands of years.

What changed this was a snow-capped mountain from thousands of miles away.

Wolf Juxu Mountain!

Xiongnu language: wolf dwelling cave mountain!

Gonglu Shui, which originated in the Wolf Juxu Mountain, meandered all the way to the east, bringing the distant snow water to this barren land.

However, it doesn't catch up all year round.

Every winter and early spring, it breaks down.

It wasn't until late spring the following year that the sun melted the snow and brought the river to the desert.

As a result, seasonal oases have been formed.

The cliff plain is just right, located between the Gobi and the desert, at a pass in the eastward valley of the Gonglu River.

Whether it's people from the north of the shoku, who want to go south, or people from the south who want to go north.

It's a must-see.

It is also the most suitable springboard.

There is no need to look at the satellite map, just look at the geography presented in the sand table in front of him, Zhang Yue knows that if he wants to go north to the north of the curtain, it is almost impossible to occupy this place.

Because......

To cross the Han Sea, you must attack upwards along the valley formed by the winding river of the Gonglu Water.

Just like Huo Quzhi did twenty-seven years ago.

First fought in the Cliff Plains, then marched north, crossed the Gonglu River to the south, and captured Nanhou Mountain (now Darkhan Mountain), at this time it had already stepped into the core land of the northern part of the Maku.

As long as the Han army can attack here.

Then, the whole battle situation will suddenly become clear.

Why?

Because, although Nanhou Mountain is not high, because it is the highest point of the Gonglu River Meander.

It is also a perfect strategic place to cut off Yanran Mountain (now Hangai Mountain) and Jinshan Mountain (now Altai Mountain).

Standing on Nanhou Mountain and looking northwest, you can see the direction of the Yuwu River Valley (now the Tula River Valley), which is the lifeline of the Xiongnu in the north of the Muku.

Turning to the north, you will see the upper valley of the Gonglu River.

That is, the road that Huo Qu walked to seal the wolf Juxu Mountain.

Pity......

Now the Guards Corps is like a roadblock on the road of this great expedition.

I want to cross the Gonglu River, cross the Hanhai, arrive at Nanhou Mountain, and follow the journey of the idol back then.

The guards at both ends of the cliff plain and on the banks of the Gonglushui River were Zhang Yue's biggest challenge and obstacle.

His eyes were fixed on the cliffs.

This magical land.

Zhang Yue asked slowly: "According to the opinion of the public, how will Wei Lu and King Guyan arrange their troops?" ”

Xu Xiangru thought for a while and said: "Shizhong Gong, if the last one is Wei Lu, he will definitely only arrange a small number of cavalry in Yayuan for vigilance, and the main force will be arranged on the north bank of Gonglushui!" ”

"Why?" Zhang Yue asked.

"Please look at the ...... in the waiter" Xu Xiangru pointed to the geographical direction of the cliff plain, and said: "The cliff plain is vast and covers hundreds of miles, if the large army is placed here, it will be difficult to control and concentrate the troops to deal with the situation that may occur......

"Not so on the north shore of the Gonglu River, this place is long and narrow, and you can garrison a large army!"

"The most important thing is that it is easy to defend and difficult to attack, unlike the cliff plain, and if it is attacked, it is difficult to react quickly!"

"And husband, north of Gonglushui, the terrain is higher, if an enemy attacks from the south, just like our army, in fact, it is from the bottom up, and the upward attack is advancing, and its own physical consumption will increase!"

"By the time the attack reaches the shore of the Bow Lushui, I'm afraid I'm exhausted!"

"What's more, it is dangerous to hold the bow and water, and any enemy army that tries to cross the river to attack will be severely attacked by the cavalry deployed on the north bank!"

"Attacking halfway is not a unique method in China!"

"Therefore, the last general deeply thought that Wei Lu would inevitably place the main elite on the north bank of the Gonglu River, and treat it solemnly, and only send a small or part of the troops, Tun and Yayuan, as a warning!"

Zhang Yue listened, nodded, and said, "General, so, it makes sense!" ”

"But...... Wei Lu and Xuyan Yan, will they really give up Yayuan? Zhang Yue expressed doubts about this, he picked up his sword, nodded on the sand table cliff plain, and then pointed to the northwest, the part that was not built, and said: "Wei Lu and Xuyan are the elite of the Xiongnu, and they must know much more about the geography and strategic landform of the north and the Xiongnu than we do!" ”

"They will definitely know that if they give up the cliff plain, then if our army does not cross the river, but turns around and attacks east from the cliff plain, and crosses the Hanhai, they can go straight to the ......."

Zhang Yue's sword slashed hard in the air east of the sand table, and three words came out of his mouth: "Yu Wushui!" ”

"And Zhao Xincheng on the bank of Yuwu Water!"

Today's Yuwu water is the Tula River in later generations.

Any one can look at a map and take a closer look at what is around the Tula Valley to see how important this area is!

can understand why Li Guangli is so obsessed with Yu Wushui.

In fact, the decisive battle of Mobei 27 years ago was divided into two battlefields, the east and the west.

Huo Quai, who was sick on the Western Front, sealed the wolf and lived in Xu Mountain, achieving an unprecedented and unprecedented expedition.

And the Weiqing Department on the Eastern Front, in terms of actual strategy, is actually an attack related to the life and death of the Xiongnu Empire.

In fact, during the decisive battle of Mobei, the Huns made strategic deception before the war.

Through frequent mobilization and active display of their troops, they made the Han army believe in the illusion that the Xiongnu were alone in the main force of Gonglushui, but in fact, after completing this strategic deception, Yin Zhixian and Zhao Xin quickly led their main force of the royal court and the main force of the Youxian King to cross the Hanhai Sea and enter the Yuwushui Valley.

At the same time, the main force of his Zuo Xian King concentrated on Gonglu Shui.

It's an old and simple tactic.

Tian Ji horse racing.

Their strategy was to use their inferior horses to drag down the elite ace of the Han army, the cavalry cluster of Huo Qu's sick department.

At the same time, they concentrated all their forces, that is, what they considered to be the superior horses, at the southern foot of Yanran Mountain (Hangai Shannan), waiting for the main force of the Han army's eastern front to be sent to the door.

The plan is not unsuccessful, and the strategy is not unsophisticated.

However......

After thousands of calculations, Yin Zhixian and Zhao Xin both miscalculated one thing.

Wei Qing Department, although there are not as many elite cavalry as Huo Quai's cavalry cluster.

However, Wei Qing's battlefield experience and conducting skills are not in vain.

More importantly, although the army of the Wei Qing Department was not as good as Huo Quai's troops, it was still more than enough to fight the Huns.

Coupled with God's help, a gust of wind suddenly blew when the Huns attacked the most violently.

All the plans and calculations, after all, the bamboo basket is empty.

So the decisive battle of Mobei, the Huns were not only stabbed through the western front by Huo Qubing (this is a blow they calculated and can withstand

）。

The Eastern Front, which was the center of the national war, was also defeated.

If it weren't for Wei Qing's ignorance of the geography of the north of the Makubei at that time, he wouldn't dare to rashly pursue in depth.

Then, Yin Zhixian is afraid that he will be invited to Chang'an as a guest.

Twenty-seven years ago, Yin Zhixian and Zhao Xin were able to use the strategy of horse racing.

And deeply knows, where is its lifeline?

Now, twenty-seven years later, can Wei Lu and that Guyan King Xuyan not know?

Would he dare to give up Yayuan and expose his softest heart in front of the Han family?

Do they dare to bet that the Han army will not dare to force the Hanhai Sea, go straight to Yuwushui, and go to his heart to play?

"What do you mean?" Xu Xiangru asked respectfully.

"If I were Wei Lu...... Zhang Yue closed his eyes and stretched out his hand to rub for a moment in the cliff plain and the Gonglu water basin of the sand table.

The map of the afterlife in my mind gradually coincided with this sand table.

Although two thousand years of geographical changes can lead to the vicissitudes of the sea, the general terrain and the large geographical context are the same.

In later generations, the map of China was in the shape of a rooster.

Near the rooster's neck, there is an N-shaped bulge.

During the Republic of China, on the map of China, there was an N-shaped bulge in this area.

This protruding part is incomparably consistent with the geography of the cliff plain.

However, the current Yayuan is larger and wider than the Darigang Love of later generations, and the location is also biased to the northeast (in fact, the Darigang Ai on the map of the Republic of China is exactly like this...... Well, I can't say more, if you are interested, you can find the relevant content yourself)

After a long time, Zhang Yue opened his eyes and looked at the generals: "If I were Wei Lu, I would first arrange the baggage and elite on the north bank of the Gonglu River, and at the same time, build a pontoon bridge over the river, and send a large number of light cavalry to Yayuan to warn, once there is a limit to find the traces of the Han army, immediately cross the Gonglu Water and seek combat with the Han army in the Yayuan, and at the same time, leave a part of the elite on the north bank to guard the baggage and serve as a reserve!" ”

"In this way, Wei Lu can take care of the defense of Yayuan and Gonglu Water at the same time!"

"You can leave enough time and have enough room to react!"

This is the best way for Zhang Yue to deal with the current situation of cavalry operations after thinking about ancient and modern geography and war examples.

If we do this, we can guarantee that we have the best choice at all times.

Whether it is invading the south of the curtain or retreating to the north, and at the same time giving early warning to Mobei, there is enough time and space.

Even in the face of the attack of the Han army's heavy troops, he had a chance to retreat.

And if he has the opportunity, he can even use the geography of the cliff plain to fight a siege and annihilation battle in the local area.

"If Wei Lu is arranged like this, what will our army do?" Sima Xuan was immediately anxious.

A big traitor and a Xiongnu Shan Yu's younger brother were right in front of him, and if he didn't find a way to eat his stomach, he felt that he would regret it for the rest of his life.

As for the Han army, which is less than 4,000, it will take the initiative to attack more than 9,000 Hun cavalry......

In the Han Dynasty, this was a common thing.

After the decisive battle of Mobei, the Han cavalry often took the initiative to attack the Xiongnu cavalry, which was twice their size, and often won victories.

Almost all the defeats and draws were carried out by the lone army, surrounded and dragged down by the Xiongnu with more than four times the number of troops.

What's more, after the battle of Lu Ze, the Han army has already played with self-confidence.

Don't say nine thousand.

It was 20,000 cavalry, and Sima Xuan was not stunned.

It's a big deal, hold them back, and wait for the Juzhu Army, the Flying Fox Army, and even the county soldiers from Taiyuan to come to help.

And the Han army now relies on the supply of Huxu, Nanchi and Zhushui, and can launch a cavalry battle of more than 50,000 in the area of Gonglushui.