Since ancient times, fighting wars is not just a simple military operation, because of the problem of logistics grain and grass, the variables that appear in this war are many, like we all know that Bai Qi's action to eliminate the Zhao army in Changping, in the later stage, everyone competed with the problem of logistics grain and grass, if the Zhao state grain and grass are sufficient, it is actually able to drag down the Qin army, but the fact is that the Zhao state can not afford to drag down first.
In the Three Kingdoms period, for the collection of military food, Cao Cao's lieutenant Should be the most familiar to everyone, and there are also differences within the Shu Han regime, that is, when Liu Bei was fighting, there was never a shortage of grain and grass, but Zhuge Liang always had this problem, why was this so?
We know that Liu Bei has been in the wandering stage in the early days, there are not many opportunities for independent combat, and his real beginning is after the defeat of Cao Cao here in Chibi, whether it is to obtain the two places of Jingzhou and Yizhou, or to conquer Hanzhong or the Eastern Expedition to Sun Quan, these actions have not appeared because of the lack of grain and grass, which led to the failure of the operation, like the fiasco of Yiling is not a problem of grain and grass, and at this time, the person in charge of the grain and grass problem is Zhuge Liang, of course, he is the role of a military master in the yanyi, In fact, the real Mr. Kong Ming is the most powerful is to govern the country, so the problem of grain and grass has always been responsible for him!
Then, when Kong Ming himself went on the Northern Expedition, he must have understood the importance of grain and grass, so he had to do a good job in logistical work before fighting the war, so why did there still be a shortage of grain and grass? In fact, this matter is also very simple to say, we see Liu Bei fighting in the places are Jingzhou and Yizhou, although the terrain here is also very complicated, especially into shu land is more difficult, but we can not ignore the waterway, fighting in these areas, Liu Bei can transport grain and grass through water transport, this way is not only worry-free, more convenient!
Even if it is the battle in Hanzhong, although the terrain is also very responsible, but here is actually the northern barrier of Shudi, their connection with Shudi is greater, and it is also more aspectal, on the contrary, Cao Cao's army came from the north, and the transportation of grain and grass was actually more inconvenient, which is relatively speaking, Liu Bei had an advantage, so he was able to defeat Cao Cao and gain this place in Hanzhong, and Cao Cao also lost Hanzhong, and finally the hope of unifying the world was shattered, otherwise when Cao Cao occupied Hanzhong, Why was Liu Bei so nervous? The reason is that Shudi wants to defend Hanzhong, which is too difficult.
And the object of Zhuge Liang's marching attack was Cao Wei, naturally it was going to go out of Hanzhong, so at this time the mountain road was rugged, and the march was not easy, let alone escorting grain and grass, and Wei Yan's soldiers came out of the Meridian Valley, why is it that the risk-taking behavior is greater? Let's not say whether the army can pass, even if they successfully reach the city of Chang'an and take the city of Chang'an, but what if the other Shu Han armies cannot keep up? Under such circumstances, Wei Yan was facing the danger of being trapped in the city, there was no sufficient logistics and grass, and whether he could support it was a difficult problem, so this was also a very important reason for Zhuge Liang's refusal!
It is because of the inconvenience of grain and grass transportation that this Kong Ming invented the wooden cow flowing horse, and transporting grain and grass in this way can also be regarded as solving a big problem for him, but even so, did not he later punish Li Yan, who was in charge of grain and grass? Of course, there are also problems that he deliberately did, but it can still reflect that Zhuge Liang's logistics of sending troops do often have problems, otherwise Li Yan's desire for such a reason would not have been possible!