What's the gap between Woods Valley's ingenious plan and smuggling?

First, the comprehensive national strength and military strength of the two countries are very different. The talents of Shu are dying, and the soldiers will be few; Wei is full of talented people, and the soldiers are stronger than Ma Zhuang. Wei Yan's small army of 5,000 men, even if it succeeds in capturing Chang 'an, will be alone and unsustainable, and will inevitably be surrounded by Cao Wei's heavy troops. Once Wargo's sneak attack is successful, Cao Wei's powerful national strength and strength are behind. Some people say: Wargo is a sneak attack, which has nothing to do with the overall strength, right? Actually, it is not. Wargo walked 700 miles in level tone, bringing only 2,000 troops to Jiangyou, but leaving nearly 30,000 troops along the way. After the attack on Jiangyou, he joined 30,000 troops and surrendered to Jiangyou, which is probably close to the sum of Chengdu's defensive forces.

Then, as fast as lightning, it captured Fucheng County, adding a lot of strength. After Mianzhu was conquered by superior forces, the Shu-Han army collapsed across the board. Without Mianzhu, Chengdu is basically an isolated city. Therefore, Liu Chan had to surrender. Therefore, although Wargo attacked Jiangyou with only 2,000 soldiers, his follow-up troops actually kept flowing, and when he finally arrived in Chengdu, it was close to 40,000. Imagine if Wargo is not superior in strength, but wants to attack Jiangyou with only two thousand soldiers, and then conquer Mianzhu and Chengdu in one fell swoop. Unless the Shu army is made of mud, Wargo will be destroyed by Mianzhu Zhuge Zhan alone.