Diaoyu Mountain is located in the middle section of the south side of Diaoyu City. It is the commanding height of the whole city, but the area accounts for only 20% of the whole city. It is a small hill that is three miles long from east to west and two miles wide from north to south.

Moreover, the farmland area in Diaoyu City was originally arranged on the westernmost side of the city and was on the cliff platform near the Jialing River. So once Liu Xi retreated to Diaoyu Mountain, it means that the defenders completely lost the self-sufficient agricultural area and had no ability to replenish and hematopoietic.

The fortifications on the mountaintop are not strong, it is purely because the mountain is too high and too steep, so it is naturally very dangerous - the mountaintop is two hundred meters higher than the plain platform next to it.

It can be imagined that on a hillside that is five or six hundred meters long on the east and west sides, the vertical altitude is 200 meters high, which is almost a steep slope of thirty degrees throughout the journey. A little bit along the mountain road can set up pit antlers and pinnacle fences to disgust you for a long time.

However, these fortifications are just troublesome and not unsolvable. Li Su just practiced the tactic of attacking and pulling the city through layer by layer by layer by layer, so that the troops can better work together, try to use fewer human lives, use more equipment, and completely remove the last nail.

The counterweight catapult cart has been invented for almost half a year. Whether at Jianmen Pass or Diaoyu City, they used to play a role of harassment and did not conquer any city pass. Now that they are about to kick the door, they naturally have to do their best to train their troops.

And taking advantage of this time, Li Su also reported the victory to Liu Bei in advance, allowing the subsequent main army to move south as soon as possible to prepare for the battle here to complete the battle, and then go upstream to take the Chengdu Plain.

Liu Bei's main troops were all northerners. Except for the newly subdued Banyan Man, most of the other troops were afraid of heat, subtropical diseases and miasma. Therefore, in June and July, they had been staying in Hanzhong for two months and did not dare to do anything big.

Even though the substitute troops who had no choice but to switch to Xu Huang's defenses before, there were still many fever and miasma diseases after arriving at the local area. The temporary non-combat reduction increased by hundreds or hundreds.

Fortunately, Li Su insisted that everyone should not drink raw water or excrete it anywhere. He used military orders to strictly restrict sanitary conditions to ensure that more than 80% of people with fever and unacceptable conditions can be saved and will not permanently lose their combat effectiveness or die of illness.

To completely adapt to the southern climate, it is impossible for those Youzhou troops to have a buffer period of two or three years. Neither the strategy nor the medicine at that time solved this problem. This is the law of nature.

When Li Su's prediction message was sent to Nanzheng, it should be mid-August, avoiding the hottest heat in Ba County. Liu Bei rectified the reinforcements and marched to Jiangzhou. It was almost the end of August and early September, and it was just about the end of August and early September. It happened to use the clear and refreshing autumn to expand the territory. If the large army arrived too early, it would also lead to the consumption of military rations on the battlefield on the southern front and the transportation from Hanzhong was not enough, so the more troops they were, the better they had to be adjusted.

Everything went as planned. On August 22, Zhao Yun led nearly 10,000 Youzhou cavalry and the main force of Wuhuan cavalry, and rushed to the battlefield of Diaoyu City first.

Due to the terrain problem in Yizhou, Zhao Yun's cavalry had not fought many decent battles since entering Sichuan. The last time he shone was the battles that lured the enemy out of Yangping Pass at the beginning of last year. Later, he rested for fifteen or sixteen months, and kept eating, training, and maintaining public order.

Now, we are finally going to break through the mountainous areas and enter the Chengdu Plain along the Yangtze River. We can divide the enemy troops in a field and play it out.

On the third day after Zhao Yun arrived, on August 25, the last deadly resisters of Liu Xi's troops were officially completely annihilated, all the camps and cities on Diaoyu Mountain were cleared, and the Diaoyu City Battle was officially over.

After calculation, Zhou Tai and Xu Huang captured a total of 6,000 people during the entire battle, of which more than 4,000 were local soldiers in Yizhou, and less than 2,000 soldiers in Dongzhou.

The total number of defenders in the three waves should be more than 9,000, which means that 3,000 people died. After counting, only about 40% of the defense were killed in battle and injured and lacking medical treatment.

Another 60% are caused by surrounding diseases, miasma diseases, and gastrointestinal infectious diseases caused by lack of firewood. Most of them are Dongzhou soldiers suffering from this disease. Who made Dongzhou soldiers also exiled from Yongliang? They are definitely countless times higher than locals.

All of this has nothing to do with Li Su bribing the traitor to poison Liu Mao. Liu Mao just had diarrhea after eating fish and causing dozens of people who were in close contact with him. It can only be said that northerners entered Sichuan, and they came to the hottest furnace area in the first year. With the sanitary conditions at that time and under the high-intensity war environment, it was normal that only half of them died of illness.

Not to mention the warring troops, even people like Li Su who are so careful about staying at home to prevent exposure have been psychologically shady by the heat of this place. He will never stay in Bajun in the summer, even in Chengdu, and it will be cooler and better.

To put it another way, since Xu Huang's troops were troubled by fever and miasma while siegeing the city, Li Su decisively ordered Xu Huang to move to the campsite and move from the open-air sun-exposed camp in spring to a relatively shaded area.

This is actually a bit risky, because according to the classic "Baoyuanwei and garrison troops while garrisoning is a taboo for military strategists", moving to a shaded place in midsummer is easy to be ambushed by enemy troops and ambushed and attacked by fire.

In the later generations, Liu Bei's Battle of Yiling took place, the area where he took place was from Diaoyucheng in Ba County, Jiangzhou, and crossed the Three Gorges of the Yangtze River. The climate there was not as hot as Jiangzhou, and the latitude was low. Didn't Liu Bei also be the hottest time in June that he couldn't help but move the shade of the village and was burned?

However, Li Su asked Xu Huang to move the camp at that time, but he still kept a backup plan. He also asked Gan Ning and Zhou Tai to lead the southern troops to set up an ambush, which secretly formed a horn. Liu Mao had already been psychologically shady by the two previous sieges of the city by land and water, and he did not have Lu Xun's IQ.

Therefore, I always feel that "Xu Huang must have deceit in the shade of the village". He will not defend without any attempts to attack fire, which will lead to these strategies and attacks and defenses completely fighting against the air with wits and courage. There is no obvious manifestation, and it is not worthy of being a historical record in later generations.

In the entire Diaoyu City battle, the total deaths of the attacking party were more than 2,000, but only more than 1,000 people died in battle, and the rest were also deaths of illness. In terms of exchange ratio, the cost of Liu Bei's army was not high, but the consumption of food and grass was very terrible.

After all, so many troops have such a long-lasting siege, the front line ate nearly 200,000 shi of military rations, and then 800 miles of water transport, the dangerous shoals in the middle have to be reloaded and unloaded and transferred in the land. For a Diaoyu City, at least 300,000 400,000 shi of grain stored in the Hanzhong regime. If the price of grain is converted into money, it will be 1.500 million. If it were just two years ago, it would be possible to buy a few officials. This is a typical waste of food and save lives.

A few days after the battle ended, on August 26th and 28th, Guan Yu and Zhang Fei also arrived at the front line. The armies passed through the gap in the Jialing River near Diaoyu City in turn, breaking through the layers of mountains in northern Yu, and arrived at the city of Jiangzhou on the first day of September.

Liu Bei's army assembled 30,000 main forces, including 10,000 cavalry, 10,000 northern infantry and 10,000 newly attached prisoner reorganized troops, and Banyan barbarians.

When Liu Bei's army entered Sichuan, the total force was only 30,000, so two-thirds of the direct troops entering Sichuan had been mobilized in this battle, leaving only 10,000 confidant veterans to stay at various passes in the north. According to the early warning, after all, Hanzhong's territory is so large, it is not easy to let go of any defensive power.

...

The main guards in Jiangzhou City are military generals Yang Huai, Ling Bao, Li Yi, and civil servant Zhang Su.

Before, Gao Pei and Zhao Wei were also killed by Gan Ning to reinforce Diaoyu City, Zhao Wei was also arrested, and finally surrendered as an internal supporter again. Therefore, the defenders of Jiangzhou really had a decline in talents. Although there were nearly 10,000 people, the morale was extremely low.

After the Han army had 30,000 main force surrounded Jiangzhou City. The next morning, Li Su asked Zhao Yun to set up a formation in the open northwest of the city, tidied up the team, displayed his flags, and strengthened his army's power, so that Li Su could send people to surrender and disintegrate the enemy's morale.

Anyway, Zhao Yun's cavalry unit had to wait a little longer to enter the Chengdu Plain before it could be used. It is still impossible to use it to attack the city, so I will be the guard of honor first to scare people.

Yang Huai and Zhang Su at the top of the city were shocked when they saw the neatly arranged ten thousand cavalrymen below, with bright weapons and distinct armor. The Ba County Governor in the south had never seen so many cavalrymen in Youzhou.

Moreover, according to his own understanding, Zhao Yun specially picked out the white horses, about two or three thousand, ranking at the front, and at least one thousand cavalrymen in the front row were all iron armored, and the iron armored white horses were endless, which was so scary.

"The general's army in the Western Expedition is so magnificent that he cannot even defend Diaoyu City, let alone Jiangzhou?" Zhang Su trembled in his heart, just because he was afraid of being suspicious of his colleagues, so he dared not show his timidity.

Zhao Yun waved his gun and pointed at the people next to him, and then shouted the line Li Su taught him: "Listen to the defenders in the city! This is Zhao Yu, the prefect of the pseudo-Ba County, Liu Yan, who was proclaimed by Liu Yan, who was captured by our army and surrendered! Zhang Su, you are just Zhao Yu's chief minister, why not surrender early?

This is Wu Ban, the son of Wu Kuang, the former Northern Army of the Capital and the left-ranking general Wu Kuang, who also joined the general of the Western Expedition with his father to fight against the rebellion. His brother Wu Yi has abandoned Liu Mao and surrendered in Diaoyu City. Maybe your level of confidence to Liu Mao is comparable to Wu Yi? If you are obsessed with him and resist the court, you will definitely be killed on the day the city is broken!"

One by one, the morale of the defenders on the city was even more relaxed: "What? Prefect Zhao was also arrested and surrendered?"

"The General of the Northern Army of the Capital also came to prove the authenticity of the imperial edict for Liu Bei? Are we really betraying the court and fighting the imperial army?"

Li Su took the opportunity to continue to ask Zhao Yun to lead some scolding soldiers and shout: "Listen to the defenders in the city! Liu Mao was not shot dead while fighting in Diaoyu City. He died of diarrhea after eating fish! He was so weak in his thirties. Others couldn't kill him but died after eating fish. This is a punishment from God!"

"In ancient times, Wei Bao heard from Xu Fu's prime minister Bo Ji and rebelled against the Han Dynasty. As a result, he died and Bo Ji was obtained by Emperor Gaozu. Later, Liu Xin heard that Liu Xiu should change his name to the emperor, so he was killed by Wang Mang. He believed in prophecies and divination and wanted to force the thief who could only seek his own destruction and laugh at the world!
Chapter completed!