Landmines were actually used in warfare in the Song Dynasty and played a great role in the battle of Shaanzhou with the Jin army, but at that time, the mines only ignited the line of fire and caused an explosion when they found that the target had entered the ambush area, so they had to be supervised by someone and could not be 'smart'. Pen Fun Pavilion www.biquge.info and Zhao Hao's improvement made the mines uncontrollable, self-firing, simplifying the combat mode, reducing the risk of casualties, and also giving the enemy huge damage, but he thought that it was more of a psychological injury, which made it difficult for the reinforcements to instigate the capital, and he did not dare to take a step easily.

Thinking that after arriving in this world, he only copied some weapons that had long been eliminated by history, but he still exerted incomparably great power in battle, changing the way and outcome of the war, until it affected the course of history, and Zhao Hao couldn't help but sigh that the 'craftsman' changed the war. And he also knew that the Mongols were better than themselves in the role of craftsmen, they had changed the world with the help of craftsmen, and they were still latecomers compared to them.

When the Mongols destroyed the Jin, on the eve of the fall of the Jin State, their wish to 'defend the success' was more than that of the Southern Song Dynasty, and the large-scale battles were not wild killings, but sieges and villages. At that time, the Jin State had become a de facto great power in the Central Plains", basically ending the nomadic state. They are also comfortable in the city, so why go back to the open grassland wilderness and hunt nomadism?

When Genghis Khan first started his army, he always regarded the Jin people as his strongest opponents, and it is well known that the nomads are characterized by flexibility and mobility, and they are good at fighting in the steppes and plains, but not at attacking cities. At that time, the Song and Jin countries formed a tug-of-war, and there was also a reason why the Song army was good at defending the city. Nomads are offensive armies, and since they are attacking, they have no choice of battlefield. So the siege is a pass that they have to cross.

However, in the battle of Juyong Pass, the Mongol army fought with the Jin soldiers, and the Jin soldiers were defeated and collapsed. The Mongol army, which could reach the hinterland of the Central Plains, suddenly dared to attack the city, and became good at attacking the city again. Because they have ladders, crossbows, and artillery. This made the Jin and Song countries defending the city very unbearable. They were surprised to find that in addition to fighting on horseback, the Mongols had acquired weapons and skills for siege warfare. A steppe tribe suddenly has ladders and artillery for siege. The level of military science and technology has advanced by leaps and bounds, where does this mysterious power come from? This mysterious external cause mainly comes from within the Central Plains - the technical assistance of the Han people.

The reason why the Han people were willing to carry out technological 'export' was that at that time, because the Jurchen Jin State occupied the northern region of China, the center of civilization of the Huaxia people, and adopted a very cruel oppression of the Han people, so the Han people under the rule of the Jin State were eager to fight the Jin State, and many Han craftsmen brought the manufacture of ladders, crossbows, and artillery to the Mongolian military camps.

On the other hand, as the leaders of the Great Song Dynasty, who suffered from the anger of Di Yi, they first stabilized the Khitan with the silver of the year, and then fed the Jurchens to the eldest and jointly destroyed the Khitan. But they found that the Jurchens were worse than the Khitans, and when the Mongols appeared, they helped the Mongols kill the Jurchens. Before the Mongols destroyed Jin, the Southern Song Dynasty asked for money and goods, and the Southern Song Dynasty was still able to lead the four countries in military affairs with weapons and technology.

As far as military technology is concerned, the Song Dynasty was leading in military science and technology due to its huge military expenditure and strong scientific research strength, and the equipment of the Song army at that time was also the most advanced, it was the first army in the world to be equipped with a large number of firearms, as well as a large number of gunpowder weapons of all kinds, from "rifles" to "mines", and even "gun grenades" and "flamethrowers". When the Song army and the Mongol army jointly destroyed the Jin State, the firearms of the Mongol army were completely provided by the Song army.

This kind of technical assistance has been complementary in the process of Mongolia's rise, and has played a mysterious foreign aid. So that this cavalry has the 'martial arts' of field warfare at the same time, it also has the 'weapons' to win all the cities in the world. Later, Genghis Khan occupied the central capital of the Jin Dynasty, and the Jin people had to pay tribute to him until the death of the country, and they did not encounter much fierce resistance, and they were a little more obedient than the Song army, because they could not fight and could not hold it.

The Mongols, who had obtained the military technology of the Central Plains, were like tigers and cultivated to become the world's martial champions, and by the thirteenth century, the Mongol army was no longer a simple steppe light horse. The gunpowder weapons of the Han people, the Mongolian war horses full of endurance, and the heavy armored cavalry of the Jurchen tribe were all gathered together, so that the military force of the Mongol Empire reached a point that made the world stunned and helpless, otherwise it is unknown whether the Mongols could rise later.

It took only more than 30 years for the Mongols to conquer Eurasia, but the subsequent Song-Mongol War lasted for 50 years. In fifty years, there were three large-scale wars. In the first two times, the Southern Song Dynasty won one and drew one. However, due to the lack of internal affairs in the Great Song Dynasty, a large number of rebel generals such as Lü Wenhuan and Liu Chuan appeared, which caused a large loss of military technology, assisted the Mongols to establish a powerful naval army, and made the Southern Song Dynasty completely defeated in the Third Song and Mongolian War. The reason why the Song were able to fight a protracted war with the Mongol army was not only that they had a stronger desire to defend than the Jurchens, but also that their 'defending the city' kung fu and the leading military technology were more effective......

When he first came to this world, Zhao thought that he could compete with the Mongols and save himself and the Great Song Dynasty with his cursory knowledge of this period of history and the 'strategic schemes' known in his previous life. But after a few years of hard work, he felt that the profession of 'craftsman' helped him more, so that he could restore the leading position of the Great Song Dynasty in military technology in some aspects, and gain the ability to win a decisive victory on the ocean and change the appearance of Qiongzhou, so that he could have a foothold.

In the face of Quanzhou, a 'fortified city', Zhao Yu could not carry out a time-consuming and laborious siege battle, nor could he afford to fight a siege war with huge casualties, and at the same time, he could not destroy the city and lose the original intention of this battle. Now the only solution is 'technical unlocking', first open the city defense facilities in front of them and enter the city, and what he is doing at the moment is to configure a key to break the city as soon as possible.

Now the mine warfare has achieved initial results, the most powerful instigation of Quanzhou in the future to block the periphery of the battlefield, but the situation is still very tense, Xinghua and Fuzhou reinforcements are also rushing to Quanzhou, then they must divide most of the troops with simple fortifications to help, then they will lose the advantage of troops in the siege war, and if they can fight according to the city, it will be much easier, much more comfortable, may help him only these strange weapons in front of him are hurrying to build, I hope to be able to fight with this...... (To be continued.) )