This famous battle, which has been circulating in rivers and lakes for a long time, took place in the early years of the Northern Song Dynasty. The leaders of both sides are Zhao Kuangyin, the pioneer of the Northern Song Dynasty, and Li Yu, the queen of the Southern Tang Dynasty. The purpose of this campaign is to consolidate its dominant position in the Northern Song Dynasty and eliminate small countries that have surrendered themselves. Due to the disparity in strength between the two sides, the Northern Song Dynasty won with absolute superiority. So why did the army of the Northern Song Dynasty lay the foundation for victory by extraditing tens of thousands of troops by one person? I think there are two reasons.

First of all, the Northern Song Dynasty occupied a favorable geographical advantage. Although the army of the Northern Song Dynasty was facing an siege war at that time, the army of the Northern Song Dynasty built a bridge across the Yangtze River in Caishiji, and it will soon reach Jinling City after crossing the river. From then on, troops and materials can be transported continuously. If we take this place, we can realize the siege plan behind the Northern Song Dynasty.

Secondly, it is also attributed to the cowardice and incompetence of Li Yu, the queen of the Southern Tang Dynasty. As we all know, Li Yu is an excellent poet in the history of China. But he is definitely not a good monarch. He didn't know when the Northern Song Dynasty would hit him, and he didn't react until the Northern Song Dynasty crossed the Yangtze River. However, what he did was to make hundreds of thousands of soldiers devote themselves to their duties, drinking and writing poems in the palace and enjoying their lives.

Therefore, the strength of both sides is not a level at all. Under these two conditions, the Northern Song Dynasty can be said to defeat the Southern Tang Dynasty at any time. Now, just wait for an opportunity to make Nantang disappear from history. After a period of siege, one man broke through a bridge, so the whole army ran along this gap, and the soldiers in Nantang became vulnerable instantly after the city was broken. This leads to the story of one man crossing the bridge to extradite tens of thousands of troops and defeat Nantang. From my own point of view, this is accidental but more inevitable. What will happen to the last emperor like Nan Tang?