If Zhuge Liang had listened to Wei Yan's suggestion to send troops from Meridian Valley, would history have been rewritten? There is still a possibility, after all, the Wei State was still in a chaotic period at that time.
Let's take a look at the situation at that time, the state of Wei was in a period of civil strife, and the king of Wei, Cao Rui, and the powerful minister Sima Yi and other powerful ministers were suspicious of each other. Sima Yi was deposed and returned to the field, and when Zhuge Liang sent troops, the monarchs and ministers were at a loss. They didn't know Zhuge Liang's strength, so they sent Xiahou Mao, who could only talk on paper, to meet the enemy.
Anyone who has read the Three Kingdoms knows that Xiahou Mao is a general who can only talk and has no actual combat experience.
After Zhuge Liang subdued Wudu, Tianshui and other three counties, Wei Yan proposed a strategy that could quickly capture the western capital of Chang'an. He took thousands of people out of the Meridian Valley to march into the army, and unexpectedly went around to Chang'an City, but Xiahou Mao was determined not to be vigilant. Wei Yan had thousands of soldiers and horses to take trouble in the middle, and Zhuge Liang's army was killed from the main road to Chang'an, and the inside and outside took Chang'an in one fell swoop.
Due to Zhuge Liang's cautious nature, he did not adopt Wei Yan's suggestion. It's a bit risky, but it's not necessarily a good one.
Because at that time, the gap between Shu and Wei was relatively large, regardless of comprehensive national strength or military strength. If Zhuge Liang wants to take Wei by surprise, he can only take Wei by surprise and capture Wei while Wei is not ready. When Wei has been defended, the chances of capturing Wei will be slim.
At that time, the Wei State focused on the deployment of defenses in Longxi, Qishan, Wuzhangyuan and other places, and the Meridian Valley was the weak area of the Wei army's defense, and it could directly attack Chang'an. If Zhuge Liang listened to Wei Yan's suggestion and took Chang'an before Sima Yi left the mountain, history would likely be rewritten.
After Zhuge Liang rejected Wei Yan's suggestion, he insisted on marching from the main road, and as a result, he lost the street pavilion. After the street pavilion was lost, there were tears to kill the horse. After Zhuge Liang beheaded Ma Yan, he also lost a spy at the level of Xu Shu, and finally lost his skills.
Although history cannot be repeated, Zhuge Liang's character of suffering from gains and losses, and not daring to take risks with soldiers, what inspiration does it have for future generations?