Outside the Fanglin Gate, three thousand elite knights stood on top of the war horses, the whole area of black pressing, faintly able to see the appearance of some weapons, the scene was silent, and occasionally the war horses made a clattering sound.

Wei Chi Jingde was at the front of the queue, and the three thousand elites were all carefully selected from various branches of the military in accordance with Li Yuanji's requirements.

Li Yuanji was still riding the white war horse, wearing forty or fifty pounds of silver-white armor, and what he was holding in his hand was another horse lance, the original one had been given to Yu Chi Jingde.

Beside him was Ma Zhou, who was dressed in cloth, and was shocked by this majestic and murderous scene, and almost couldn't even control the war horse under his crotch.

Ma Zhou never understood, why did Li Yuanji take him? Why didn't he even bring his two doglegs? Why?

"Your Highness, do you really want to pull out the camp?" Yu Chi Jingde was a little surprised, the dark night covered up his bewildered expression, but he still couldn't hide Yu Chi Jingde's surprise.

"The soldiers are very fast, if you wait until tomorrow to pull out the camp, I am afraid that it will be the Turks and cause Weishui." Li Yuanji nodded, the news of Duan Zhixuan's defeat came back in the afternoon, so the time of defeat was most likely this morning, or it was likely yesterday afternoon.

But no matter what time it is, if the Turks do not stop, but continue to go south, they will be able to reach Weishui tomorrow at the earliest, and when the Turks arrive in Weishui, what is the point of them not being able to get through? It was necessary to cross the river before the Turks reached Weishui.

Rushing at night is not uncommon for Li Yuanji, for a later generation, as long as he does not fall asleep, he can travel 24 hours a day, and he waved his hand: "Pull out the camp!" ”

"Your Highness, it is not easy to march at night, many soldiers can't even see a few steps away, such a march, not only can not speed up, but will make the soldiers tired, even if you cross Weishui before dawn? How can the soldiers have the energy to fight again? Judging from the last general, it is better to order a rest first, rush to Weishui before dawn, and cross the river at dawn, so as to ensure the speed of the march and the energy of the soldiers. Wei Chi Jingde hurriedly dissuaded.

Nyctalopia?

Li Yuanji subconsciously remembered the word night blindness.

Night blindness is not a disease, but it is really fatal, when the light is insufficient at night, it is not even possible to see clearly a few meters away, and the march of the army, the most taboo is the blind, a large group of blind people take advantage of the night to hurry, a little wind and grass, it is possible to bomb the camp, as for the consequences, do you need to think about this?

And I forgot such an important thing, the ancients, no, to be precise, should be twenty years after the founding of the country, night blindness has always accompanied the Chinese nation, and even most people in this world.

It wasn't until the economy got a little better and nutrition gradually caught up that the Chinese people got rid of night blindness.

But in this era, most soldiers except for officers have night blindness, and it is not easy for the army to launch a night attack, more often it is still lurking in place during the day and waiting until night to attack.

"How many soldiers can see ten paces away?" Li Yuanji asked, there is no time to delay any longer, and he must set off tonight.

Yu Chi Jingde shook his head, these three thousand people were transferred from other places, and Yu Chi Jingde was only familiar with a few hundred people.

But soon, the voice of an officer gradually sounded in the dark night, and in a short time, about 100 people appeared in front of Li Yuanji.

The ratio is close to thirty to one, which is a bit scary, but not to the worst.

"Divide five people to explore the way ahead, the rest of the soldiers are in a group of thirty people, the predecessors hold the reins of the descendants, left and right are staggered into a column, each of these soldiers is responsible for a group, in front of the team, responsible for controlling a group of directions and advance and retreat, each group is ten steps apart, except for the leader, the rest of the soldiers only need to hold the reins, and they can rest on the horses." With a wave of his hand, Li Yuanji directly solved the problem of marching at night.

It doesn't matter how fast they go, even if the war horses advance at the usual speed, at most it will take an hour to reach the edge of Jingshui, and as long as they cross Jingshui, they can arrange for the troops to rest and recuperate.

"No!" Seeing that Li Yuanji had made up his mind, Wei Chi Jingde didn't say anything more, and directly asked people to deploy according to Li Yuanji's arrangement.

In less than a cup of tea, the three thousand people were divided into 100 teams and slowly advanced towards the north.

There was silence in the procession, except for the sound of horses' hooves colliding with the ground, and nothing else was heard.

The military discipline of the Tang Army was severe, so severe that when marching, no weapons were allowed to make a collision sound, and when the formation was in formation, no sergeant was allowed to act privately, let alone turn heads and ears, and be cowardly.

As the battle formation advances, the pace should be uniform, and with each instruction given by the officer, the soldier will make a single move. When you charge, the battle formation must be more neat and well-organized, and when everyone runs out ten steps, you run eleven steps, or eleven steps away, then you will be beheaded.

Soldiers do not need to train too many items on weekdays, queues and strength, this is the training subject of ordinary infantry, it is also worth mentioning that the Tang Army is equipped with bows and arrows is relatively sufficient, each infantry is an archer, and there is no need to be too precise when shooting arrows, just do it neatly.

"The terrain here is gentle, close to no shelter, and there is no danger to defend, which is suitable for large-scale corps operations." With the help of the faint moonlight to explore the surrounding environment, the calm terrain, Li Yuanji couldn't help shaking his head, turned his head to Ma Zhou and said, "Write it down!" ”

"Write it down?" Ma Zhou was suddenly stunned and said in surprise.

"How?"

"Subordinates, let's record it!" Ma Zhou shuddered violently, took out the brush from the horse's back, dipped it in a wooden barrel, and then also recorded it on the horse's back with the help of the faint moonlight.

Thanks to Li Yuanji, Ma Zhou's food has improved greatly, although night blindness also exists in Ma Zhou, but it is not like others who catch blind when it gets dark.

The crooked handwriting made Ma Zhou hate to throw it away directly, so he could only secretly make up his mind to copy it again after the team stopped.

"Most of the soldiers have night vision impairment, this king suspects that it should be a nutritional problem, and after dawn, ask the soldiers who lead the team one by one to see what they eat on weekdays, and try to find out the rules to solve the night blindness of more soldiers." Li Yuanji continued, although he knew the reason, but in order not to make people feel too shocking, he still didn't explain it directly, anyway, it must be himself who summed it up in the end.

"This shouldn't have anything to do with eating, right? I think it has something to do with the weather, what do you ...... on a summer night? Wei Chi Jingde scratched his head, he also has night blindness, but it belongs to the lightest type, and in the summer, it is the lightest, and there is not even night blindness, but in winter, night blindness will appear again. Year after year, it also made him feel that it should be related to the season.

"Night blindness!" Li Yuanji reminded.

"Yes, it's this night blindness, it's much better in the summer, and it will reappear in the winter." Wei Chi Jingde nodded hurriedly.

"What's the difference between a summer diet and a winter diet?" Li Yuanji asked by taking advantage of the situation.

Wei Chi Jingde thought hard about it, and then shook his head: "It's no different, it's all the same bird." ”

"This king knows, it's greens, and the only difference between summer and winter is greens, write it down!" was lazy to talk nonsense with Wei Chi Jingde, and Li Yuanji directly explained the reason.

Green cabbage does not refer to the name of a certain vegetable, but the general name of all green cuisines, but everything that can be eaten is called green vegetables, regardless of greens, rape, spinach and the like.

The diet of ancient people was relatively simple, and if you really want to talk about the difference, there is only such a difference, because you can't see vegetables at all in winter.

Wei Chi Jingde had a ghostly expression on his face, such a simple question, I didn't expect it for Mao Yu? Could it be that this bird night blindness really has something to do with eating?

Forget it, whatever you want, as long as you can cure this night blindness, for the army, it will be a lot of money, an army without night blindness can basically be regarded as invincible on the battlefield.