Not to mention the elders of the Xianbei clan, even Tian Yu, who had been with the army for many days, every time he saw Zhao Yun take out this map, compare it with a ruler, measure it, and draw new content, his heart felt as if he was boiling a pot. ※※

In this era, armor, especially full-body iron armor, has always been known as a weapon of militarism. The minister secretly hides some big knives, guns, spears, bows, crossbows and arrows, the emperor usually doesn't care, the Han Dynasty has a strong martial style, this little thing is not to make a fuss at all, but if anyone dares to hide hundreds of pairs of iron armor at home, it will definitely die when he sees the light.

So Wang Kuang smashed 500 strong crossbowmen out that day, but he didn't have the intention of building a heavy armored foot soldier, not because he couldn't afford it, but because he regarded himself as a loyal minister, and he couldn't store that kind of thing at home, and it was too late to build it temporarily.

However, iron armor is not the most sensitive thing, the most secretive, and the most likely to attract death is the map, especially the military map.

There is no need to elaborate, as long as Zhang Songxian map is cited as an example, it can be explained very simply. Zhang Song's dedication to the map is equivalent to the significance of the land of Xichuan, because the map is one of the top secrets in the military in this era.

Without a map, the aggressor can only grope his way forward, and if he is not careful, he will go astray. The more detailed the map, the higher the level of secrecy.

For Wang Yu, of course, the map of Youzhou will not be a secret, but the map of the grassland, even in the hands of Gongsun Zhan, the general of the border Saisu, is only the most sketchy kind - only marked with mountains and rivers such as Baishan and Qinshui, and then dotted with important places such as Danhan Mountain, and then there is nothing.

Road? There was no such thing on the grassland, how could there be one on the map?

Detailed distance? Terrain changes? Have any tribes gathered, or have they ever gathered? None of them, with that kind of map to be able to march on the steppe, and to point to where to fight where to fight. Throughout the ages, there is only one Huo Qu's disease. Others...... Even Li Guang has lost his way, do others still need to talk about it?

How did Huo Qubing travel across the grassland and never get lost, no one has an accurate answer, it is a mystery for the ages. It is said that he is very good at capturing captives and leading the way, but there is a problem, how can he catch the prisoners he needs every time?

You know, even the old shepherd on the steppe. You can only rely on experience to identify the places you have walked, and although the tribes of the steppe are nomadic all year round, they also have a relatively fixed range of activities. Within this range, it is not difficult to grab a few captives and ask for directions. But when Huo Qu was sick and swept across the grassland and desert, the range of maneuver was usually calculated in thousands of miles, did he have to ask while walking? If so, how could he keep his march secretive and make sure he never made a mistake?

Another way of saying it is more mysterious, it is nothing more than Huo Quai's illness is the star monarch descending to earth, the talent of the heavens and the like.

Tian Yu is a very assertive person. Of course, he will not take the above statement seriously, he believes that the secret of Huo Qu's illness is nothing more than two possibilities. One is that the young marshal has an unusual intuition about direction and distance, which is not something incredible. Many famous generals have similar talents, so it is said that those who are generals must be familiar with astronomy and geography, otherwise it will be difficult to move an inch.

There is another kind. Even Huo Quzhi also has similar skills as Wang Yu...... Or the other way around. Many of the skills shown by Wang Yu are related to Huo Qu's disease. And these two are both hussar generals who are young marquises, which makes people wonder if there is something that implicates the two together.

Anyway, he watched Zhao Yun draw the map with one pen, using a magic weapon called a sextant.

Tian Yu really couldn't find any other words to describe that thing, a thing the size of a copper tripod, can measure the current location out of thin air...... It is only in myths and legends that you can find utensils with similar functions.

Zhao Yun had patiently explained the principle to him, but the fierce generals of the three armies of Yongguan had limited knowledge in this regard, and when he heard it, he knew that he was reading from the book, and everyone was like him, and what kind of sun angle or something like that sounded completely unreliable.

The explanation is not powerful, if Tian Yu hears it, then he will really see the ghost.

Anyway, he knows that this thing can measure the range, and when it is perfected in the future, it can be positioned out of thin air, and the fleet of Qingzhou Dongdu relies on this treasure to ensure that it does not get lost. Zhao Yun also said that this thing was not good enough, and the hussar general was not very satisfied, saying that if the measurement distance was too far, there would be an error of hundreds of steps or something......

Tian Yu was speechless when he heard it, look at General Gongsun's pure stream of consciousness map, and then look at this in General Zhao's hand, the error of a few hundred steps is a hair!

Anyway, he knew that with this treasure, the miracle of Huo Qu's illness would no longer be impossible to replicate, and if Li Guang had an accurate map in hand, he would not have died with regrets.

Anyway...... It's just amazing!

Tian Yu didn't know Murong Duo's plan, but he thought of this possibility, luring the enemy, exhausting the enemy, and using the terrain to counter-encircle and kill, which was originally the best trick of the Xianbei people.

If it weren't for Zhao Yun's ability to draw maps, he would know that it would be useless, because he couldn't determine when and where the enemy would counterattack. To be honest, on the first day after the pursuit, he was already dizzy, and the Xianbei people kept changing direction, intent on confusing the Han army.

If Tian Yu led the troops himself, he would be worried.

If he continued to pursue, he would risk being ambushed, and he could not always be on guard, if that was the case, he would not need the enemy to fight, he would have dragged himself down first, and it would be a pity to give up the pursuit.

In fact, this problem has been encountered by many generals in the Central Plains, except for the supply and transportation, it cannot be positioned, and it is the second major problem in the Central Plains to use troops on the grassland.

Now with the map, it's simple.

Combined with the analysis of the battle situation, there are only a few places where the Xianbei people can set up ambushes. It can't be too far from the border fortress, because Xianbei's army is in Daijun and Shanggu, and if you want to pose a threat to the wind cavalry, you can only transfer troops from Guannai. At the same time, there should be terrain nearby that can hide the large group of people, and there should be a campsite.

Although the escape route of the Xianbei people has been changing, the overall situation is that they first flick a shot to the west and south, and then to the north, and then to the east. Although the Xianbei people deliberately carried out two night marches in order to prevent the Han army from exploring the direction, they chose the cloudy and snowy weather, and even the stars were not allowed to be seen by the Han army.

But these were all in vain, because Zhao Yun had another magic weapon in his hand, that is, the compass.

Xianbei people desperately feint and made a lot of feints, but with only these two magic weapons, Zhao Yun was already invincible. And Zhao Yun's military intuition may not be as good as Huo Quai's, but in this era, it is the top level, and it is indeed more difficult for Xianbei people to ambush him than to ascend to the sky.

"How?" Qin Feng didn't think as much as Tian Yu thought, he asked with his hands in a hurry.

The Xianbei people fled east and set up an ambush, and they would definitely divide the forces in the pass, but they could plan on their own side, and they would not delay by beating the rabbit with grass. The Xianbei people ran away, Danhan Mountain lost its meaning, and there was an opportunity to emulate the sages, Qin Feng was very sorry, if he could annihilate the hundreds of thousands of people in the Xianbei King's tent here, the meaning would not be much worse than that of Feng Wolf Juxu.

"How about sending reinforcements first?" Tian Yu also gathered his mind and proposed.

The morale of the tribal alliance has fallen to the bottom, if they are allowed to see reinforcements, maybe there will be a repetition, if they preemptively knock out the reinforcements, these hundreds of thousands of troops will not be far from collapse.

On another level, the threat of reinforcements is greater, and even some losses in the battle against reinforcements will not affect the overall situation.

"The problem is that we can't determine the exact location of the reinforcements." Qin Feng frowned.

The sextant can only determine the approximate distance, and the specific terrain still depends on people to survey. The Hu people are obviously more familiar with the nearby terrain, and there are warnings from falcons or something, if they probe around and are discovered by the Hu people, they will lose their unexpected effect at least, and it is not known if they are designed in reverse.

Therefore, sending reinforcements first is a suggestion that sounds beautiful, but it is difficult to do.

"It's not all." Zhao Yun also disagreed: "Xianbei, these hundreds of thousands of people, are a lot of tribal alliances together. If their hope is completely cut off, they will indeed collapse, but not necessarily in the way our army expects......"

Zhao Yun fought with the idea of completing the whole battle, and the combat effectiveness of these troops was far inferior to the 100,000 Hu cavalry in Daijun and Shanggu, but with them, the Hu cavalry had hope of recovery and continuation.

Therefore, what he is most afraid of is the proposition of Tuoba Lin. It doesn't matter if the Xianbei people completely collapse, in this kind of weather, the three or five people who left the tribe basically had to die of cold and starvation. If the tribes scattered and fled, he could at most divide his troops into two ways, seize a few key points and chase and fight fiercely, and the rest could only be helplessly let go.

In that case, this battle will only play a prestige and reputation, and it will not play a fundamental role in weakening the strength of Xianbei.

"What then?" Tian Yu didn't mean to be stubborn, thinking that it made sense, he spread his hands and said: "Now that the tribal alliance has formed a group, maybe those elders are already announcing the arrival of reinforcements...... It couldn't be beaten before, but now it's only going to be harder. ”

"You can't beat hard, and it's not cost-effective to fight, the lord handed over the brothers of the Hurricane Army to Yun, just to believe that a certain will not act recklessly." Zhao Yun bowed slightly, and replied with a smile: "Fortunately, the opponent is Hu Ren, not a famous general in the Central Plains, and there is still a good chance to cheat......

"Where did the plan come from?" Seeing that Zhao Yun looked confident, Tian Yu's eyes also lit up.

"It's very simple, just think about it from another perspective, if Brother Guo Rang is the commander of the Xianbei Army, what should he think about now?"

"Well......" Tian Yu groaned slightly and replied: "Of course, it is a decisive battle as soon as possible, so as not to completely crush morale." ”

"Then, if ......" Zhao Yun smiled and said something, and the second deputy general nodded his head when he heard it, and it was rare for General Zilong to cheat once, and now the Xianbei people would be unlucky.