Why was the success rate of the ancient Southern Expedition much higher than that of the Northern Ex

From the perspective of topography, the terrain in the north is high and there are many plains in the south, which causes the southern expedition to be unimpeded, and the northern expedition needs to climb mountains and mountains; From the point of view of rear supply, the south, especially the south of the Yangtze River, is mostly a land of rich fish and rice, and you can take grain on the spot during the southern expedition without worrying about the problem of grain and grass in the rear, while you need to spend a lot of effort to ensure the supply of grain and grass in the rear during the northern expedition.

This was because China's topography was high in the west and low in the east, and there was a terrain difference between the north and the south, so the Northern Expedition was like a flood pouring from north to south for the southern regime.

Because most of the ancient centers were in the north, there were no big forces in the south, so it was easy to go south.

Because the ancient north was an economic, political, and cultural center for a long time, it was easy to appear capable people and had a rich talent pool. On the other hand, the terrain in the north is mostly plains, and the population is densely gathered, and the army uprising can gather a large number of people and materials in a short time, so it is naturally easy to march south.

The south is mostly hilly and plain, with low terrain and easy to fight, while the north is steep and steep, and the terrain is higher and difficult to fight.

In ancient times, the conquest belonged to a kind of military etiquette, implying that the top was against the bottom, highlighting the majesty of the Son of Heaven. In ancient times, the territory of many ethnic minorities in the north was given the contemptuous name of Dijon barbarian. And Van has the meaning of striking and killing, and it is a relatively aggressive word.

It represents the punishment of the unrighteous or the punishment of the sins on behalf of heaven.

Because at that time the north represented the feudal evil forces, and the south was the emerging bourgeoisie, he used the Northern Expedition to describe defeating the old forces and starting a new life, at the same time. Show everyone that your actions are righteous.

Conquest is conquest, war is crusade, and many famous Northern Expedition wars in history are mostly from north to south and are just, while others are in the nature of aggression and conquest.

Because at that time, the area ruled by the orthodox dynasty of China was called the Central Plains region. During the dynasty, the other side was an area controlled by ethnic minorities. The east, south, and west sides of the Central Plains all belonged to the dynasty. Therefore, the Northern Expedition was used to indicate the war against ethnic minorities.

Because ancient China and the north have always been a gathering place of productive forces and population, and it has always been a situation where the north is strong and the south is weak, so attacking the weak with the strong is conquest, and attacking the strong with the weak is crusade.

Because the Northern Expedition generally refers to crusades, without any order from the Son of Heaven, they can only be born with crusades.

Because the center of political power in ancient times was generally in the north, and fighting to the north was generally to overthrow the regime, so it was called "felling", and on the contrary, pacification was called "levy".

The eastern expeditions, the western expeditions, and the southern expeditions will occupy and conquer, and the northern grasslands can only be fought but not occupied.

A crusade against a regime equal to oneself or a regime stronger than oneself is called a crusade, and a crusade against a regime that is inferior to oneself is called a conquest. Cao Cao's attack on Liu Biao and Sun Quan was called Zheng, and Zhuge Liang's attack on Cao Pi was a battle. Felling is a crime, and levying is unacceptable.

The eastern expedition to the west and the northern expedition to the south.

First of all, because the ethnic minorities in the north have very strong troops, which can be comparable to those in the Central Plains. Secondly, after the people in the Central Plains arrived in the north, their combat capability was greatly reduced due to the unadaptability of the environment.

First of all, the gap between the strength of the north and the south is relatively large, in ancient times the north has always been the political, economic and military center, so there is a strength base, and then because of the geographical environment and climate for the north is a help.

Because the north is vast and flat, the soil is fertile, the population is dense, and the climate is dry. In the south, there are many hilly and mountainous areas, inconvenient transportation, poor land, little arable land, scattered population, and a humid and rainy climate.

The fundamental reason for the ancient Northern Expedition was the difference in strength between the north and the south, and because of the geographical form (the north and south were bounded by the Qinling Mountains and the Huai River).

Because the weather in the north is so cold, many soldiers do not adapt to such weather in winter, so they often fail.

Because the Northern Expedition required a long journey, and the climate in the north was very cold, the southerners were generally not well adapted to the environment and temperature, so the Northern Expedition was rarely successful.