After hearing Zhuge Liang's strange words, Feng Yu said curiously: "What exactly is it?"

Zhuge Liang shook the goose-feather fan and said with a serious expression: "Your Majesty is something that can resist miasma. I have read hundreds of books and thousands of volumes, but I have not found a suitable way to defend against miasma and prevent soldiers from getting infected with miasma.

Some medical books mention them, but at a glance, you can tell that it is nonsense, ghosts and monsters, and some have been tested by Weichen during his southern expedition to Yongchang, which is almost useless. There are still many soldiers infected with miasma."

Zhuge Liang's worries are reasonable. In the battle of Yongchang in the Southern Expedition, more than 10,000 troops reduced their personnel by 4,000 people, only half of which were direct casualties on the battlefield. The remaining ones were infected with miasma and even died.

It is said that the miasma in Hongshawadi is much worse than that in the south-central region, which is also the reason why the south-west border ended suddenly when Emperor Wu of Han opened the south-west Yi and arrived in Yongchang.

In fact, Feng Yu was already aware of this. He was about to mention this issue to Zhuge Liang. Now, seeing that Zhuge Liang took the initiative to mention it, he said:

"I have explained this to Gao Shun. As long as you prepare to prevent mosquitoes, you must boil the water before drinking it. You can prevent miasma to the greatest extent. Do these two points well, the miasma in Hongshawadi will not be much worse than the miasma in Nanzhong."

In tropical jungles, mists that are visible to the naked eye in the early morning due to humid and low-heat environments. Moreover, when people are in it, they will feel stuffy. The smell of rotten animals and plants in tropical jungles will also penetrate into their nostrils. Therefore, people speculate that there is a toxic gas in this environment, called miasma.

But in this environment, people are very likely to get infected with a vicious epidemic. People take it for granted to associate this disease with the imagined miasma and call this disease a miasma. And they are very sure that miasma is caused by inhalation of miasma.

But Feng Yu, who has the original medical knowledge in the world, is very clear about this. The so-called miasma mainly refers to dysentery, not respiratory diseases, and has nothing to do with the so-called miasma. It is mainly transmitted by mosquito bites and drinking water.

After hearing Feng Yu's words, Zhuge Liang stumbled: "But this time in the southern expedition to Yongchang, General Gao Shun asked the soldiers to do what the king said, but in the end, two thousand people were infected with miasma..."

Feng Yu said seriously: "It's because two things are not done well. Think about it carefully, do soldiers drink boiled water when drinking water? Do they order mosquito-repellent mugwort every night when camping?"

Zhuge Liang was stunned for a moment and thought about it carefully. It was true that after the fierce battle, the heat and thirst were unbearable. Many soldiers were less particular, and they picked up the raw water from the nearby water source with bare hands and sent it to their mouths.

Sometimes logistics supplies cannot be delivered, so there is no way to repel mosquitoes when camping. When I woke up the next morning, the soldier was covered with lumps biting by mosquitoes.

He replied to Feng Yu: "These two things are not done in full. I will find a way to let the soldiers strictly follow the king's teachings during this southern expedition to Hongshawaddy."

Feng Yu nodded and continued, "It is impossible to prevent infection with miasma by 100%. For this miasma, there is a special herb that can quickly cure it. I already have the method to grow this medicine. However, the seeds of this medicinal material are in a very distant foreign land. It takes several months to reach it... Alas, it's a long way to go, this is a later story, so I won't mention it for now."

In fact, the herbs Feng Yu mentioned were Jinchona trees produced in South America. In the mission of [Restoring the Han Realm], he received the facility card reward for Jinchona trees planting fields and rubber plantations. However, these two things are wild species, and the facilities generated by the system do not contain their own seedlings. Feng Yu needs to collect them in this world.

Feng Yu paused and continued: "Earlier, Gu had already ordered the pharmacy to make a special ointment applied to his body, which can effectively prevent mosquito bites. He also asked them to develop and produce a portable fragrance that can drive away mosquitoes. These two things were developed when you returned in triumphant times. But a few months later, you can still use them."

...

In the sixth year of Yong'an, during the Mid-Autumn Festival, the long-prepared southern expedition to Hongshawadi finally started.

The Jinsha River is full of ships transporting food, grass and other war materials to Gufu. In addition, there are hundreds of Viking warships.

Of course, these Viking ships were not used to transport troops and cargo, but were directly put into the Hongshawadi battlefield. After they arrived in Gufu, they would be sent to the Dulong River and Nujiang River more than 300 miles away by airship.

Five thousand soldiers gathered in Gufu County have advanced to Buwei City. They are elite soldiers from the 50,000 soldiers of the regular army of Liang Army.

They are mainly composed of spear-throwing guns and shield soldiers, longbowmen, crossbow gunners, baggage soldiers equipped with elephants, and a small number of mountain scouts. In addition, there are hundreds of Viking warships and accompanying Viking sailor soldiers. Due to the geographical terrain and climate environment, this Southern Expedition Legion did not have cavalry.

The most eye-catching thing is that there are 100 giant ape warriors. At present, there are only nearly 300 such giant ape warriors in the entire Liang Kingdom. Feng Yu immediately took out 30% and gave it to Zhuge Liang.

This time, Zhuge Liang tried his best to select soldiers from the south of Bashu among the soldiers. The reason is not difficult to understand. Similarly, when he chose generals, he also chose generals from the south. Four southern generals who could fight were Yan Yan, Zhang Ren, Meng Da, and Meng Huo. Meng Huo had the task of integrating the southern barbarians, so he was excluded.

Feng Yu originally thought that Zhuge Liang would choose Meng Da and Zhang Ren. But in the end, the two generals Zhang Ren and Yan Yan followed Zhuge Liang to the battle. Although Yan Yan himself asked to fight many times, Zhuge Liang's choice still surprised Feng Yu.

In the blink of an eye, it was the early winter of the sixth year of Jian'an. Liang Jun, who had been in Buwei City for several months, finally began to march towards Hongshawadi. However, during these months, Zhuge Liang was not idle. He sent several scout teams to take Viking ships to investigate deep into the hinterland of Hongshawadi.

What Zhu Luo prisoners told me was true. More than a dozen stronghold camps and fortresses were distributed along the banks of the Dulong River and Nujiang River.

The Zhulu people's occupation of Hongshawaddy was actually only based on point occupation. After all, in this vast area covered with smoky forests, it is impossible to completely occupy it with a mere 100,000 people.

In Dulong River, more than 200 Viking ships with armored armor and equipment set sail and went down the river. On the tidal flats on both sides of the river, war elephants were walking in sequence.

Nujiang and Dulong River enter Hongshawadi, the former travels through the mountains, while the latter flows on a dense forest plain surrounded by mountains on three sides. Therefore, the Zhuluo army on the Dulong River cannot directly support friendly forces or cut off the Liang army's retreat, which requires hundreds of miles of vast mountains and primitive jungles.

Therefore, Zhuge Liang did not divide his troops into two groups, but chose to concentrate his troops and attacked south along the Dulong River line with a single sword.
Chapter completed!