In Chinese history, there were two and a half Dynasties of Nandu, those two were the Eastern Jin Dynasty and the Southern Song Dynasty, and that half was the Southern Ming Dynasty. The reason why it is half is because Nanming has always been a group of people fighting for power and profit, and has not formed a stable central government. However, in any case, the Eastern Jin Dynasty, the Southern Song Dynasty and the Southern Ming Dynasty all had one thing in common, that is, after the southern crossing, the Northern Expedition was never successful. Why is there such a common denominator? Although each dynasty has its own special reasons, from the overall point of view, there are several reasons.
The Nandu Dynasty was considered a regime of exile and was more willing to maintain the stability of the new dynasty in the south
Judging from the history of the Nandu Dynasty, the Eastern Jin Dynasty, the Southern Song Dynasty, and the Southern Ming Dynasty, it is true that they all have the nature of an exile regime.
The Eastern Jin Dynasty established by Sima Rui did not have a jade seal at the time of its establishment, and faced a situation in which the last two emperors of the Western Jin Dynasty, Huai and The Second Emperor, were taken captive by the Xiongnu. The Eastern Jin Dynasty was established with the assistance of Wang Dao, Liu Kun, Wen Jiao and others.
The situation in the Southern Song Dynasty was very similar to that of the Eastern Jin Dynasty, the Jing Kang Revolution, the Jin State abducted Hui and the Second Emperor of Qin, and destroyed the Northern Song Dynasty. Zhao Zhao fled to the south and established the Southern Song Dynasty regime, which is also equivalent to the nature of the exile regime.
Map of the situation of the Sannandu regime
This is especially true in the Southern Ming Dynasty, a group of Ming Dynasty leftover masters who fled to the south to establish a regime, which is more exiled.
These Nandu dynasties all have the nature of an exile regime, and after the establishment of the dynasty, the first thing to do is not to go north to regain the old land, but to stabilize the situation in the south and ensure that the new dynasty they established can survive.
Moreover, the Nandu Dynasty would take into account the influence of the original orthodox dynasty and have the problem of its own legitimacy when it went north to restore the old dynasty. Therefore, Sima Rui of the Eastern Jin Dynasty restricted Zu Ti's Northern Expedition, and Zhao Zhuo also had an ambiguous attitude toward the anti-Jin actions of Yue Fei, Han Shizhong, and others, and Nanming himself could not guarantee that he would not analyze too much.
In the face of the powerful northern forces, the Nandu Dynasty had no way to retreat and was unwilling to fight to the death
Although the southern region occupied by the three Nandu dynasties was different, the confrontation area with the north was mainly concentrated between the Yellow River and the Yangtze River Basin. However, the Nandu Dynasty had greater drawbacks than the northern forces, that is, the southeast direction was the sea, and there was no way back. Judging from the geographical situation, the Nandu Dynasty has no way back, so it does not dare to fight to the death.
Zhao Zhao
In other words, they may not dare to spend all their national strength to confront the North. Once the national strength was greatly depleted, the Nandu Dynasty would be quickly defeated by the north, and there would be no land to continue to flee south.
The Nandu Dynasty did not have the advantage of dealing with the northern forces, and became more and more passive
The northern forces have a back road that the Southern Dynasty does not have, so even if the Southern Dynasty can conquer the Central Plains in the Northern Expedition, as long as it fails to form a large-scale annihilation of the northern forces, it will still face the attack of the northern forces. Moreover, the original northern nomads went south, and after obtaining the abundant materials of the Central Plains, their strength also increased rapidly.
Judging from the situation in the Eastern Jin Dynasty, the Southern Song Dynasty and the Southern Ming Dynasty, after the northern forces defeated the Central Plains Dynasty and occupied the Central Plains region, their strength showed a rapid growth trend. The Five Hu and Sixteen Kingdoms in the North to the Northern Wei during the Eastern Jin Dynasty, the Jin Dynasty in the North during the Southern Song Dynasty, and the Qing Dynasty in the North during the Southern Ming Dynasty all grew more powerfully after obtaining the Northern Region.
The Nandu Dynasty was originally an exile regime, and after the establishment of a new dynasty in the South, ensuring the survival of its own dynasty and dealing with the continuation of the North to the south were the two most basic tasks. And these two tasks, so that the Nandu Dynasty can not develop at ease, this and the other, the northern forces are getting stronger and stronger, and eventually the north is the end of the complete destruction of the south.
Of course, there are not only the three reasons analyzed above, here is only the understanding of the laws of history summarized by itself for three special historical stages.