The first example is the Northern Expedition led by Pai and Li after the Taiping Heavenly Kingdom made Tianjin its capital. On the way to March, we successfully hit the gates of Tianjin and besieged Tianjin. Tianjin was heavily guarded, and they failed to win Tianjin. So they gave up Tianjin and went to Shandong. But then it was surrounded by the Qing army and local armed forces, and finally the whole army was wiped out. And Li were also captured by the Qing army and executed.

The second example is that Mongolian Khan Mungo led an army into Sichuan, preparing to go down the river from Sichuan to Lin 'an, the capital of the Southern Song Dynasty. However, when the Mongolian army arrived at Hezhou Fishing City, where the three rivers meet, it encountered stubborn resistance from the soldiers and civilians in the fishing city when attacking it. Brother Meng lingered under the fishing city for seven months and never took it down.

At that time, someone advised Meng Ge whether he could give up the fishing city, go downstream and hit Chongqing first. After winning Chongqing, come back to play fishing city. Or after taking Chongqing, regardless of the fishing city, go downstream to Kuimen first. But Meng Ge doesn't agree, and he must win the fishing city. Finally, Meng Ge died tragically at the foot of the fishing city. Although these two examples both ended in failure, they have different meanings. Obviously, the Taiping Army's approach was wrong, while the Mongols' strategy was correct.

In fact, the failure of the dream pigeon under the fishing city can only be said to be an accident. Meng Ge was injured by a stone and died. However, the Mongolian army as a whole was not affected, but had to retreat because of Khan's death. If Mongo hadn't been killed, the Mongols would have taken the fishing city sooner or later. After all, Fishing Town was still an isolated city at that time, and the rescued Lv Wende Song Jun was also beaten back by the Mongols. The gu city ran out of ammunition and food, and naturally it was captured.

The Northern Expedition in which Taiping Army was completely annihilated showed that in ancient wars, if we could not capture a city and bypass it, we would surely fail. Why did the Northern Expedition Taiping Army fail? Or in the ancient war, why did the army around the city fail when it could not capture the city? There are two main reasons. First, grain, grass and other logistical supplies were cut off. After capturing the city, food and grass can't be completely obtained from the city. After all, people may clear the grain in the farmland or burn it. Even if you occupy that city, you are likely to get an empty city.

Like Xiang Yu, "cross the rubicon" to go to war can only say that Xiang Yu is lucky. Once defeated, they will die miserably in this gambler-style play. So when fighting, there must be a supply line. If you can't occupy a city and bypass it, the supply line will be cut off, so you can't get supplies. There were no planes in ancient times, so it was impossible to drop air. You will probably starve to death. One of the major reasons for the failure of Taiping Army's Northern Expedition is the lack of food, which is proved by practice.

Second, it will be surrounded by the enemy. After you go around, there is an enemy checkpoint behind you, and you are equivalent to going deep alone. Fall into the encirclement of the enemy. The city you can't capture is just a rope that binds cloth pockets. Not only will it be besieged on all sides, but it is also impossible to find reinforcements. When the Taiping Army of the Northern Expedition hit the gates of Tianjin, it was blocked and asked Tianjin to send reinforcements. At that time, Tianjin sent reinforcements. As a result, I can't continue to play if I have played Linqing.

Because of the strong interception of the Qing army. If he and Li don't attack the city, but stick to the city, then reinforcements should be easy to arrive. Of course, tactics are flexible and changeable, and we can't say that if we can't attack a city, we can't bypass it. Sometimes, bypassing is a good strategy. For example. When the Mongols attacked Dengzhou, Xu Jin, because Dengzhou was heavily guarded and the Yugoslav capital was strong, Tuo Lei, the leader of the Mongols, could not attack.

So, he simply bypassed Dengzhou and directly attacked Bianjing, the capital city of Jin State. When the defenders of Dengzhou heard about it, they hurried out of the city to pursue the Mongolian army, ready to attack the defenders of Bianjing on both sides and intercept the Mongolian army. However, Tuo Lei didn't really kill Bianjing, but turned back halfway and set an ambush in Sansheng. After all the Jin Jun who came to rescue in Dengzhou entered the ambush circle of the Mongolian army, the Mongolian army suddenly broke out and destroyed the 6.5438+0.5 million army in Dengzhou. This is a tactical arrangement to avoid an invincible city. (Reference:

"History of Yuan Dynasty" and "History of Taiping Heavenly Kingdom")