Ren Ran was in a hurry to find Cao Liang, just to discuss the military situation, and the two hurried back to the military tent in the Zhengnan military camp, and Wen Qin and other lieutenants were already waiting in the Chinese military tent.

The matter that Ren Ran asked the people to discuss in the future was naturally a matter of escorting grain and grass.

Although it seems that escorting grain and grass is a simple matter, and no one's field army disdains to do this kind of errand, but logistics and supply are related to the lifeblood of the entire army, and it is absolutely negligent, so as soon as Ren Lan received Sima Yi's military order, he naturally had to consult with the public.

Due to the continuous war in the southeast, the operation of the southeast defense line is the foundation of Cao Wei's state, and the construction of the southeast defense line is not only to station a sufficient number of troops, but also a systematic project, involving many affairs such as tuntian, post station, logistics and transportation, and so on, among which the guarantee of logistics and transportation is particularly crucial.

Although in order to ensure the supply of grain and grass for the front-line army, the Wei State greatly developed Tuntian in Huainan, but due to the many natural disasters in Huainan, either floods or droughts, coupled with the nuisance and destruction of the Wu army from time to time, Wei wanted to make Tuntian meet the grain and grass supply of the Huainan army and civilians, and it was often difficult for Wei to do so.

Moreover, Huainan's army could only meet the general garrison needs in terms of numbers, and once the Wu army launched a large-scale military attack, the Wei army would need to send Luoyang's army to reinforce it, which would undoubtedly increase the burden of Huainan's logistical supply.

Therefore, in order to ensure the stability of the war situation in Huainan, the Wei court can be described as painstaking in logistics and transportation, from Luoyang to the Huainan front, at least more than 1,000 miles away, such a long-distance transportation, relying solely on horse-drawn mules, it is definitely not possible, the ancients often clouds, thousands of miles do not transport grain, because the road is long, the cost of grain and grass transportation is too great, not cost-effective.

In order to ensure the unimpeded transportation from Luoyang to Huainan, Wei opened the Cao Yun, and the cost of Cao Yun was low, so that it was convenient to transport Luoyang's grain and grass supplies to Huainan.

But at present, Cao Yun can only ensure that the materials will be transported to Yiyang or Shouchun, not to say that the waterway is not passable, but if it goes further, it will enter the territory of Wu, and the power of Wu's naval army is naturally known to the world, if the Wei army forcibly opens Cao Yun to Wu, I am afraid that it can only be to send food to others.

Therefore, at present, the grain and grass required by the Wei army are all piled up in Yiyang, and from Yiyang to Jiashi, it must be transferred by land.

This section of the road is not long, it is not short, about 200 miles, because it is close to the front line, it is very easy to be attacked by the Wu army, so Sima Yi thought twice, and only then let the Zhengnan army, which has relatively strong combat effectiveness, take on the task of escorting grain and grass to ensure that the supply of grain and grass on the front line is safe.

After Ren Jian received the order, he did not dare to slack off in the slightest, but summoned all the generals to come and discuss how to handle this errand.

But no matter what the war, the Chinese army was without exception the main force in the offensive operations, the vanguard of the charge, when did it do the task of transporting grain and grass, so when Ren Ran asked the generals, they all shook their heads, to be honest, they really have no experience in this area.

Cao Liang saw that the generals were not angry, so he said: "Escorting grain and grass, compared to charging into battle, is an easy errand, but it seems to be easy, but in fact it is a heavy responsibility, this grain and grass supply maintains the operation of the entire front-line army, once there is a problem with the supply of grain and grass, the army's heart is likely to collapse overnight." During the battle of Guandu that year, Emperor Taizu was outnumbered and the situation was critical, and it was precisely because of the burning of the grain and grass of the Yuan army in Wuchao that Yuan Shao's army collapsed, and Emperor Taizu had the opportunity to destroy Yuan Shao, unify the north, and establish the foundation of the Great Wei. Zhuge Ke is pretentious, naturally he will not stick to Jiashi, and will definitely find a way to sneak attack our army's grain route, in order to cut off the supply of grain and grass on the front line, and force our army to retreat, so this task is not easy. ”

Wen Qin said: "Then according to Cao's opinion of joining the army, what should we do to ensure that the grain road is worry-free?" ”

Cao Liang glanced at everyone, smiled slightly, and said: "From Yiyang to Jiashi, there are two sections, one is from Yiyang to Wuqiangkou, and the other is from Wuqiangkou to Jiashi, these two sections of the road, the first section is longer, about one hundred and eighty miles, but it is a plain, as long as there is a Xiaoqi battalion, the success rate of the Wu army's sneak attack is almost zero. Although the second section of the road is only a few dozen miles, it is full of steep mountain roads, and the terrain is complicated. ”

Ren Ran nodded again and again, the head of Cao Liang's analysis was the Tao, and no one could help but be unconvinced, the Xiao Cavalry Battalion only looked at three thousand people, but in terms of combat effectiveness on the plain, it was ten times that of the Wu army, and he couldn't get close, that is to say, it was impossible for the Wu army to choose the section of the road from Yiyang to Wuqiangkou to launch a sneak attack, and if the Wu army wanted to make a move, it would definitely choose the second road with only a few dozen miles of road.

"Then what is Cao's good strategy for joining the army to ensure that the grain and grass are foolproof?"

Cao Liang said confidently: "If you want to ensure this, it is not difficult, if the Wu army wants to set up an ambush in the area of Wuqiangkou, at least you must grasp the whereabouts of our army, as long as our army can control the plain area, block the road, and put an end to the activities of the Wu army's scouts, so that the Wu army will not be able to know when we will pass through Wuqiangkou, then even if they have the intention to sneak attack, they will not be able to do it." ”

Ren Ran's eyes suddenly lit up, if you want to ambush, you must at least master the whereabouts of the ambush opponent, if you can't even master this, then there is no way to talk about ambushes, and you can't send a soldier and horse to guard the area of Wuqiangkou day and night.

Ambush operations are often carried out behind enemy lines, and if you want to achieve your goal, you must seize the opportunity to make a decisive move, regardless of whether this blow is successful or not, you must be quick when retreating, and you must not fall in love with the battle, otherwise you will be counterattacked by the other side.

Therefore, Cao Liang's proposal to hide the whereabouts of the southern army is still a more appropriate method, and it is not too difficult to block the news in the plain area, as long as there are more sentry posts on the road leading from Yiyang to Wuqiangkou, and the Wu army's spies can be strictly investigated, it will be relatively easy to avoid leaking out.

If he can't get the route map of the march of the Southern Army, Zhuge Ke must not dare to do it rashly.

Ren Ran did not praise Cao Liang's plan, and immediately issued a military order, ordering a part of the army to block the roads and set up more sentry posts, so as to completely eliminate the activities of Wu State spies and firmly control the plain area in the hands of the Wei army.

The main force immediately set off and rushed to Yiyang.