Although the logistical supply of the Shu army was slightly better than that of the Wei army, it was only a little better, and there was not enough supply.

More than ninety percent of the grain and grass of the Shu army are reserved in the two cities of Hanle, which is also the capital of the Shu army to stick to Hanzhong, but the grain of the two cities of Hanle can only meet the needs of the garrison army in Hanzhong, and now the Shu army has 50,000 troops plus Jiang Wei's 30,000 troops, and the number of troops has far exceeded the original Hanzhong defense force, so the supply of grain and grass is inevitably stretched.

In order to make up for the shortage of military food in Hanzhong, Fei Yi ordered to transport grain from northern Sichuan to Hanzhong, so the Shu army, like the Wei army, faced the difficulties of grain and grass transshipment, the difference was that one was transferred from south to north, and the other was transferred from north to south.

After the battle is stalemate, logistics supply has become the key to the victory of both sides, and if anyone wants to drop the chain at this time, then who will likely be knocked out.

Therefore, in the matter of escorting grain and grass, neither side dared to take it lightly, and both sent heavy troops to protect the grain route to prevent the other side's sneak attack and sabotage.

The Wei army stationed troops and horses in dangerous places in sections along the entire Fu Luo Road, and sent heavy troops to escort the safety of the grain wagons throughout the process.

To transport grain on the Qinling Valley Road, ordinary baggage vehicles are completely impassable, and they have to rely on a large number of mules and horses to transport them, as well as the wooden oxen and flowing horses invented by Zhuge Liang.

In order to solve the difficulties of transporting grain during the Northern Expedition, Zhuge Liang deliberately invented a kind of wooden ox flowing horse, that is, a special wheelbarrow, a cart can carry hundreds of catties of grain, as long as it is a place where people can pass, wooden oxen and flowing horses can pass.

The wooden ox and flowing horse can be said to be an important invention of Zhuge Liang, and its appearance has solved the problem of the difficulty of grain transportation in the Shu army to a certain extent.

In the process of the Wei army's war with it, there were many captures, and later a lot of imitations, the Wei army transported grain on the plain road, using carts, and on the mountain trails to transport grain, but also used wooden oxen and horses.

Before Cao Shuang set out on the expedition, he had appointed Xiahou Xuan to propose to do a good job of grain and grass, the soldiers and horses did not move, and the grain and grass went first, which was the primary condition for marching and fighting, and in a war with a difficult road like Shu, the preparation of grain and grass was obviously the first.

Xiahou Xuan also did not have high hopes, and with the help of Cao Liang, he successfully completed the matter of raising grain and grass. In terms of transshipment to Hanzhong, Xiahou Xuan specially arranged for the thoughtful Ren Lan to supervise the transportation of grain and grass, and Ren Lan prepared sufficient mules, horses and wheelbarrows to transport the grain and grass from Guanzhong to Hanzhong in a steady stream.

Although it is said that the Wei army's grain and grass on the Hanzhong front line are tight, but it can barely be maintained, but the army has no grain in stock, once there are special circumstances, such as flash floods, landslides and other natural disasters, it is likely that the supply of grain and grass for the Wei army will be in trouble.

And the prevention of the enemy's sneak attack and sabotage is the top priority, all in all, the Wei army, whether up to Cao Shuang or down to the ordinary soldiers, knows the importance of grain and grass transportation, is highly valued, and it is impossible to give the Shu army any opportunity to take advantage of.

But despite this, Jiang Wei still had the intention of making a move against the supply line on which the Shu army depended.

After the battle situation in Hanzhong entered the stalemate stage, the situation was deadlocked, and it seemed that no one could help anyone to move anyone.

Xingshi Mountain is the eastern gateway of Hanzhong, and the terrain is extremely dangerous, if it were not for Cao Liangmiao's fire attack, the Wei army would not have had a chance to cross this natural barrier.

Today's Xingshi Mountain, from the foot of the mountain to the top of the mountain, is all bare, and now it should be the season when the grass grows and the warbler flies, and the whole Xingshi Mountain can not see a little green.

Fei Yi, as the commander of the three armies, expressed concern about the Shu army's delay in taking the momentum and Chisaka, and the war was extremely unfavorable to the Shu army.

Although the two sides are now in a kind of equilibrium, Fei Yi knows that the strength of the Shu army is now the limit that can be mobilized, and the Wei State has not yet done its best, if the battle is not decided for a long time, the Wei State is likely to increase the troops in Hanzhong again, and the pressure on the Shu army will be even greater, because the Shu State has no reserve troops to call.

Therefore, the Shu army must expel the Wei army from Hanzhong as soon as possible, so as to ensure the safety of the Hanzhong defense line.

But Fei Yi thought about it left and right, and there was nothing to be done, the Wei army was strong in Xingshi Chisaka, and it was very rare for the Shu army to succeed whether it was a strong attack or outwitting.

At this time, Jiang Wei threw out a bold plan, that is, to attack Fu Luo Dao and cut off the Wei army's grain road, as long as the grain road is broken, the Wei army will be in chaos without a fight.

However, although Jiang Wei's plan was explosive, the reaction of the generals was extremely bland.

Sneak attack on the grain road, this kind of combat can be imagined by individuals, but in the same way, if you can imagine it on your side, the other party will not think of it?

There is no need to send scouts to investigate, and it is also known that the Wei army attaches great importance to the protection of the grain road, and the entire Fu Luo Road is in the rear defense of the Wei army, if you want to attack it, you must bypass the current position of the Wei army, and in the face of the well-defended Wei army, the possibility of smuggling is almost zero.

Therefore, once Jiang Wei's plan was proposed, no one in the generals was cold to him, and they only felt that Jiang Wei was a little whimsical.

Fei Yi shook his head lightly and said, "Boyo, your idea is naturally good, but it is extremely difficult to implement, the Wei people attach great importance to its grain route, how can they give you the opportunity to sneak attack?" ”

Jiang Wei said confidently: "This matter has been carefully considered, although I dare not guarantee 100% success, but seventy or eighty percent certainty, after all, there is something, and I also ask the general to give an order, and I should lead the people of the headquarters and go all out." ”

Fei Yi said worriedly: "Seventy or eighty percent sure, are you overestimating Boyo?" Go deep behind enemy lines, fight alone, and if you don't pay attention, the whole army will be destroyed! ”

Jiang Wei said: "The art of war is cloudy, put it to death and then live, now the battle situation is deadlocked, the situation is extremely unfavorable to our army, if we can't expel the Wei people from Hanzhong as soon as possible, when their reinforcements arrive, Hanzhong will have great difficulties." Therefore, after thinking about it again and again, we must not sit still like this, we should take action, only cutting off the grain route of the Wei people is the only way for our army to win, and I hope that the general can allow it. ”

Fei Yi hesitated, and Zhang Yi stood up and said: "General, the last general thinks that General Jiang's words are reasonable, the situation is so unbearable, if you don't have the courage to break through the cauldron and sink the boat, how can you retreat from the enemy?" ”

So Fei Yi agreed to Jiang Wei's request to fight, but in order to ensure that nothing went wrong, Fei Yi sent Zhang Yi and Liao Hua to lead 10,000 horses each to meet Jiang Wei from the left and right wings.