… From the afternoon of the beginning of the month, the Yu army began the early siege of the city as a collection of artillery Shirenwan passage. Disperse your forces around the city to form a siege. And count the number of enemy towers on the Chang'an city wall, and roughly reconnoiter the layout of the defenders.

Then, all the news is gathered to Sticky, who gathers the generals to discuss possible tactics.

Ma Wu quoted Sun Tzu's strategic thinking before, saying that "ten are to besiege it, five are to attack it, and twice it is to fight" does not specifically refer to attacking the city. Rather, it is about the enemy and us, in the case of a huge disparity in troops. and surrounded him, and surrendered without a fight. It is used in siege, that is, a long-term siege, and when its food is exhausted, it will naturally open the city and surrender; If the disparity in forces is large, then storm and fight a rout. As far as siege is concerned, it is to rush and fight violently, and see who is hard; If the disparity in strength is not large. Then you can only fight a contact war, test the opponent, find out the weak points, fight if you can, defend if you can't, and retreat.

At present, the situation of the Song and Jin armies is nearly 200,000, regardless of the composition of the army, there are so many heads anyway. Since it was several times larger than the defenders, and the Jurchens had to seize Chang'an, they could only storm onslaught. Since you want to attack, you must be swift, not to mention that one blow will be hit, at least at the beginning of the war, you must let the soldiers know that there is hope in this battle, and the city can be broken. In order to achieve this goal, Mu Han decided to let Fu Chang, the commander of the Han army, who was good at siege cities, command the troops.

The Jin army was in full swing to prepare, and Xu Wei in the city was also making the final inspection. Before the war, in a rather tight time, he met with civil and military officials. A comprehensive investigation was made of Chang'an's city defense. Anything that could become a breakthrough for the Jin Army was to be improved.

But there was one place, he always felt uneasy, on the evening of the first day of the first month, after inspecting the defense of the troops, he led Wang Yu and other generals to investigate there.

Here, it is a city gate in the east of Chang'an City. Xu Wei, Wang Yu, Wu Jie, Du Feihu, and relevant officials of the Transshipment Department stood by the city gate. I was looking at the channel not far away. What makes it different from other gates is that it is a water gate, and this aqueduct is called the "Dragon Canal." "In order to solve the domestic water supply in the city, the Sui and Tang dynasties organized the people to dig channels and divert Luo water into Chang'an.

Since the Tang Dynasty, Chang'an City has suffered repeated military disasters. Several aqueducts have been abandoned. In the seventh year of Dazhong Xiangfu in this dynasty, in order to solve the water problem, the government organized manpower and repaired the "Dragon Canal." The west canal makes the water of the Luo River flow into Chang'an again through here. The problem of water supply for officials, soldiers and civilians in the city has been solved, but for the city defense, this can be described as a big flaw. The water gate, it can't be like the general city gate to set up an urn city, put a thick gate, can only use the water gate. Easy to be breached. Despite the fact that heavy troops have already been laid here. set up all kinds of equipment, but Xu Wei was still at ease. It is said that the fall of Tokyo in history was due to the Jin army's breach of the West Water Gate in Tokyo Castle. That is, where the Xu Mansion is located.

Xu Jing thought about it a little, there were already quite a lot of hidden piles, spunlaces, and cable chains here, and even if the ships of the Jin Army could break through the water barrier, they would never be able to sail into the city. Besides, the rear force arranged here is sufficient, and the bow and arrow are strong. Infallible. Zhang Bin of the Transshipment Division said.

Xu Wei shook his head, stared at the water cupboard and said, "It's better to be careful, this place can be said to be the weak point of Chang'an's city defense." The Jin army has accumulated rich experience in attacking the city over the years, and it is definitely possible to attack it here, and turned to Wang Yu, an expert in defending the city, and asked, "In the opinion of the minister." Does the Watergate defense need to be strengthened?

There is no need for Wang Yu to say directly, "It is estimated that the Jin army will not come to attack the water gate, but will directly cut off the water source!" ”

"You're saying, "They're going to block the dragon canal?" Xu Wei asked.

"Yes, others don't know, but Zhang Shen is very familiar with the situation in Chang'an. Most of the time, he would have suggested that Mu Han go to Matoukong to block the weir pond and cut off my water source, so that the moat would become a moat. ”

Xu Wei is not afraid of this, cutting off communications, supplies, and water sources, anyone who attacks the city will do this. Although Chang'an's water depends on this dragon canal, even if it is broken, it will not trap Chang'an. The reason is that since the capital was moved to Luoyang at the end of the Tang Dynasty and Chang'an was abandoned, the water for residents was based on the wells in the city. Later, he came to the present dynasty to repair the water diversion channel, the reason is that the alkali and halogen in this place in Shaanxi are heavy, and the groundwater is salty and bitter, which is not suitable for drinking.

But now the battle is fighting, as long as you can live. What about drinking salt water? You can still drink urine if you are in a hurry! In view of this, at the beginning of the decision to hold Chang'an, the Xuanfu Division organized manpower to re-dig the abandoned wells in the city, and dug some new wells to ensure water for military and civilian use. Not only that, but because of the influx of large numbers of troops and refugees. Xu Wei's commander also kept a register of all the wells. Water is regulated as an important strategic commodity. The army is in charge of which areas and which wells are used, and there are strict restrictions on how much water can be drawn each day, so as to ensure that Chang'an will not fall into trouble due to water shortages.

As for the moat becoming a moat, there is no need to be afraid, the widest part of the Chang'an moat reaches a hundred steps, and the narrowest part of the city gate is more than ten steps. Lower the suspension bridge to pass. The Jin army could still only attack the city through trench bridges.

"Pass the order, let the people in the city get more water, and in a few days, I'm afraid they will be stunned to drink salt water."

As Wang Yu expected, from the second day of August, the water level of the dragon canal and the moat was repeatedly lowered. It turned out that Zhang Shen reported to Jin Jun that Chang'an City relied on the Dragon Canal for water. The dragon canal is to build a weir pond in the place of "Matoukong" to accumulate water. The water flows northward to Changle Slope and is divided into two canals, east and west. At the beginning, during the Dazhong Xiangfu years, only the west canal was repaired, and now the weir pond can be blocked, so that Chang'an has no water available! Dry up the moat! In this way, the hearts of the soldiers in the city will inevitably be shaken!

Han Chang then transferred troops for Zhang Shen to lead. To Matoukong, under the command of the craftsmen of the original foot Yanshuai Division, the weir pond was blocked, the water flow was diverted, and the dragon canal gradually dried up.

Sticky Han was very happy, praised Zhang Shen vigorously, and awarded the craftsmen who commanded the water cut off to be given official ranks, and the treatment was good. In fact, he captured Duyan. The greatest benefit for the Jurchens is not the land, not the city, not the army, but the talent! Especially all kinds of craftsmen! Whether it is building cities, water conservancy, or manufacturing weapons, which one is not urgently needed by the Jin army?

Before the fight began, the defenders' water source was cut off. Hit its morale and morale, and not a single soldier. Good omen, this is an excellent omen, Chang'an will be broken!

Just when the Jin army was rejoicing, Yelu Mawu came out again to pour cold water. You Zhang Shen said that Chang'an relies on the Dragon Canal for water, and this canal was repaired more than 100 years ago, so what did the soldiers and civilians of Chang'an drink before that? You're a fool. Or when we are fools? If you want to know what will happen next, please log in to Yihan. More chapters, support the author, support genuine reading!