In more than three years from the 16th year of Yanxi to the present, Jiang Wei has launched three consecutive attacks on Longxi, an average of once a year, and the scale of the attack is also larger than that of once a year.

Jiang Wei also closely monitored the situation in the Central Plains. The defeat of Sima family and the rise of Cao Liang made the situation in the Central Plains chaotic. This undoubtedly made Jiang Wei feel the arrival of opportunity. The more chaotic the Central Plains, the situation was more beneficial to Shu. Therefore, Jiang Wei used troops so frequently and intensively, wanting to take advantage of the chaos to seize the power, occupy Longyou in one fell swoop, and lay the foundation for attacking the Central Plains.

But Jiang Wei's opponent Guo Huai is really too experienced. If Jiang Wei changed his opponent, he might have succeeded. However, Guo Huai has been defending Guanlong for more than 20 years and knows the land of Guanlong. Although Jiang Wei's offensive is aggressive, Guo Huai always defends this move, keeping the dangers and keeping it alive without fighting. Although Jiang Wei won a small victory, in the end, he could only withdraw his troops and stop fighting because the food and supplies could not keep up.

The majestic and steep Qinling Mountains provided a barrier for Shu, allowing Shu to use a state to check and balance the powerful Wei State. However, everything has a favorable side and a disadvantage. Whether it is Zhuge Liang or Jiang Wei, the biggest difficulty after sending troops was not how powerful the enemy was or whether the strategy and tactics were appropriate, but a question of logistical support.

The small scale of the troops sent is difficult to pose a threat to the Wei army. The large scale of the troops sent, and the transportation of food and grass supplies became a fatal key. Tens of thousands of people went to war, and the daily food and grass consumption was very amazing. Therefore, the Shu army was conducive to quick battles but not to last. Once the war entered a stalemate stage, the supply of food and grass from the Shu army would definitely be lost, and eventually had to withdraw its troops.

Even if he is as wise as Zhuge Liang, he can never come up with an effective solution. Even if he creates a stunning Trojan horse to transport food and grass, he cannot completely solve the problem of food and grass supply. The road to Shu is difficult and difficult than to reach the sky. This sentence is really not something he can say casually.

In terms of defending against the attack of Shu, Guo Huai was in line with the tricks used by Sima Yi. He was not greedy for merit or aggressive, nor did he seek quick victory. They just wanted to use hard work to beat the Shu army to death.

Jiang Wei was also worried about this. He could not solve the problem of food supply. The Shu army could not show off its strength in the Guanlong area, let alone defeat the enemy.

After Jiang Wei failed to attack Di Dao in the 19th year of Yanxi, he decided to settle down and solve the problem of grain supply. At present, most of the grain and grass needed for the Shu army's northern expedition came from Shuzhong. The Shuzhong plain is known as the country of Tianfu, with abundant resources. However, the journey from Shuzhong to the front line is long and difficult to transport. Since ancient times, there has been a saying that there is no grain transport for thousands of miles. Transporting grain from thousands of miles can not withstand the consumption on the road. Therefore, transferring grain from Shuzhong to Guanlong front line has always been a shortcoming in the logistics of the Shu army.

When Zhuge Liang was alive, he had already noticed this issue. He went to Hanzhong personally to urge the Shu army to farm in Hanzhong, and provided funding for the Hanzhong people to increase their enthusiasm for farming. Then the biggest difficulty in Hanzhong was the population. When Cao Liang was defeated in Hanzhong, he moved most of the population in Hanzhong, resulting in a sharp decline in Hanzhong's population and barren land. Although it had been more than 20 years of development, it was still relatively slow. The Hanzhong area alone could not provide sufficient supplies for the army to fight the Northern Expedition.

Therefore, before each northern expedition, the Shu army would accumulate a large amount of food and grass resources in the Hanzhong area. As the saying goes, before the troops move, food and grass will take the lead. The senior leaders of the Shu army have been extremely concerned about the supply of food and grass. The transportation of food and grass has become a top priority that cannot be ignored in the war.

But despite this, every time the Shu army attacked, they almost fell into the dilemma of food and grass scarcity. Although they won many battles, they were always a fatal shortcoming in the area of ​​food and grass supply. After winning the battle, they had to withdraw their troops.

Jiang Wei learned from his mistakes and realized that if the problem of food and supplies cannot be completely solved, the Shu army would not be able to turn victory into victory. Even if he tried his best, no matter how many victory he won, it would be in vain. As long as the enemy adopted a drag-on technique, the final result would still be destined, and the Shu army had to retreat because of the food.

To solve this problem, it is impossible to solve it by transporting grain from Shu alone. On the far distance, the transportation consumption is too great. Now, the road is difficult and difficult to transfer, so even if the whole country is devoted to it, it may not be able to support the long-term war.

If you want to truly implement food and grass worries, you must achieve the front-line supply of food and grass. Cultivating land and reclamation on the front line is probably the only solution to this problem.

Jiang Wei did not choose to farm in Hanzhong, but chose Dazhong, which is closer to Longxi, to farm in Dazhong, which is separated from Longxi by a mountain. Jiang Wei has frequently used troops in Longxi in recent years, so Dazhong has become the first choice for Jiang Wei to farm in the first place.

Since withdrawing troops from Longxi in the first month of last year, Jiang Wei has been calming down to carry out military farming, concentrating more than 100,000 military and civilians. Even the Qiang, Di and other Hu people who moved from Longxi to Shu were summoned by Jiang Wei to the military farming team and made every effort to reclaim wasteland and farming. In two years, he obtained more than 2 million hu of grain, laying a solid foundation for the next Northern Expedition.

Next, Jiang Wei was waiting for the right opportunity. Although he had not obtained any land in the past few years, Jiang Wei also accumulated rich experience. Jiang Wei believed that the power of the Shu army alone was not enough to compete with the Wei army. When the situation in Guanzhong was stable, he was almost ineffective. Only when the chaos in Guanzhong was in chaos and he sent troops at that time could he be sure to win.

So this time Jiang Wei was not in a hurry, but patiently waited for the opportunity to come. He knew very well that he had been too eager to achieve success in the past. Haste would not achieve it and waste his troops, money and food. So this time he must be steady and make complete preparations, and wait until the right time to send troops. In this way, the success of the Northern Expedition would become very great.

In June, Sima Zhao abolished Wei and established Jin, and changed the dynasties. The news spread to Dazhong. Jiang Wei was very excited. For example, changing dynasties all represented turmoil. Moreover, when Sima Zhao became emperor, he did not have the advantage of dominating the world. He just used the land of Yongliang to divide the emperor and was in a corner. Such a Jin country obviously had a congenital deficiencies. Jiang Wei believed that his opportunity to send troops would soon come.

However, Jiang Wei did not act rashly at this time, but sent a large number of spies to sneak into Guanzhong to find out the news about Guanzhong. Only the real turmoil in Recent is the best time to send troops.
Chapter completed!