Some people think this plan is clever, because Wei Yan has lived in Hanzhong for a long time and knows the local situation very well. In the case of unequal military strength between Shu and Wei, the weak side should win by surprise, and Wei Yan's plan can achieve this goal.
But some people think that this plan is too risky, and surprise is the key to success. However, tens of thousands of people, more than ten days of military action, it is impossible not to be detected by the enemy. Cao Wei will certainly send many scouts along the way. Once he knows the movement of the Shu army, on the one hand, he will harass and block it in the mountains based on the dangerous terrain, on the other hand, he will mobilize heavy troops to guard the noon and prevent the Shu army from entering the customs.
Even after all kinds of difficulties and great sacrifices, we can't expect to get it right away in the face of this Millennium ancient capital. So Wei Yan's meridian valley plan is not a surprise victory, but a pure military adventure.
However, the party that has always supported this plan seems to have the upper hand. This is because Zhuge Liang did not adopt Wei Yan's battle plan, and the Northern Expedition did not achieve final success. So some people think that if Wei Yan's plan is adopted, it may be successful.
In fact, there are some problems with this logic. The failure of the Northern Expedition is not necessarily caused by the choice of attack route, and even if Zhuge Liang finally chooses a problematic route, it does not mean that taking the meridian valley must be correct.
The art of war is divided into odd and right. Sun Tzu's Art of War says: People who fight a war use the right combination to win by surprise. ? Conventional tactics are positive and surprising. The two must be combined and divorced from the basis of conventional tactics. Blindly surprised may not win.
It is said that Wei Yan's plan is an adventure, because the core of this plan is a long-distance attack, and only 5000 soldiers who can fight can capture Chang 'an. Although it is a strategy, it lacks conventional tactics as the basis and becomes alone.
Although Xia Houmao is not a famous soldier, he will not abandon the city without seeing thousands of people give in. Once Xia Houmao didn't escape, Wei Yan lost more than half of his plans.
In the era of cold weapons, what military strategists were afraid of was not fighting in the field or guarding the city, but attacking the city. Even an isolated city cannot be captured for a long time, and there are countless examples of this. Wei Yan wants to lead 5,000 people to attack Chang 'an, which is almost equivalent to buying lottery tickets and making a fortune.