A tour of Japan's Warring States Period

The originally lively shogunate was now completely deserted. The samurai who had been arguing fiercely began to think about the feasibility of Kodaira's strategy of killing Nirasaki and cutting off the water veins. This is not yet an era when there are millions of warriors across the country and pheasants can be equipped with swords. Most samurai have been passed down from generations to more than a dozen generations, and they have basically read and recognised, and have a basic ability to think.

"Nrasaki Castle relies on the wells dug in the city to obtain daily drinking water. Apart from this, there are no other water collection measures. Even if it rains in spring, it will not be able to absorb much rain. This is the biggest flaw in the entire Nirasaki city at the moment. Our army can make good use of it.”

Koheita left his seat and walked to Yamauchi Yoshiharu and his colleagues, holding a bamboo stick in his hand. Pointing at the mountains and rivers and geography outside the tent, he started talking.

"I just left the camp and observed the direction of the Fuefuki River in Nirasaki Castle along the river. The river here has a small bend due to the existence of Mount Nirasaki. The accumulated water washed away, and there must be a siltation under the Mount Nirasaki. The water veins here are the source of drinking water in Nirasaki Castle.”

"Everyone, it is a deep well that can be dug as deep as ten people. It is difficult to dig a well from Mount Nirasaki with hands and shoulders, soil and stones. If the water veins are extremely deep, it will definitely be difficult for the Takeda clan to build the city. Dig out the water source.”

"So, the water veins under Nirasaki Castle must be very shallow and easy to find!"

"As long as our army finds the water veins and cuts them off, Nirasaki will be destroyed without attack!"

Xiao Ping was very vocal.

"Let's go and check it out with me." After listening to Xiaoheita's analysis, Yamauchi Yoshiharu believed that seeing is believing, so he didn't say any nonsense. He stood up and left without any hesitation.

When Yamauchi Yoshiji moved, the other Yamauchi samurai couldn't stand still. They stood up and left the camp. The attendants hurriedly handed over the horses to the Yamauchi clan's samurai retainers.

"Drive!" Yamauchi Yoshinori's horse was so fast that he galloped out of the camp. The others did not lag behind and rode their horses to catch up.

"Heita-chan, do you know how to find water veins?" Yamauchi Yoshikatsu deliberately slowed down his horse and walked with Heita-chan just to find out in advance.

"I understand a little bit, I understand a little bit." Xiaoping replied coquettishly. He had wanted to say this for a long time (in those movies, everyone knows a little bit about everything, hahahaha.), but it's a pity that he never had the chance to pretend this time. Bi, now he finally seized the opportunity, and after saying that, he rode away on horseback.

Yamauchi Yoshikatsu thought to himself, you are a brat, you are just a superficial brother, and you are secretive when talking to your own family. He quickly caught up with Xiao Pingtai and asked him thoroughly and clearly.

Everyone arrived not far from Nirasaki Castle. The city was still heavily guarded, with flags and watchtowers towering high, and there were ashigaru patrols on the city walls, not counting them. Yamauchi Yoshiharu did not come to observe the formation and the city, so he naturally did not look at the Nirasaki Castle that was waiting for the formation. Instead, he observed the water situation across the Fuefuki River.

Xiaoheita jumped off his horse and pointed at the surrounding terrain with a bamboo stick to explain one by one. He combined the reason why water flow may form water veins under Nirasaki Castle with geographical knowledge to analyze one by one (I won’t go into details here, I am an A in high school in Jiangsu Province). I have returned all my Grade 1 geography scores to my teacher. I can’t tell you anything (1, 2, 3, 4, 5, 6). I convinced everyone on the spot.

Yamauchi Yoshiharu is also an action man. Now that the strategy has been decided, he immediately recruits his entourage and recruits the miners and oremen from Shinano Mashino Kanayama.

Xiaoheita was still immersed in the great success of the pretend competition. When she saw Yamauchi Yoshiharu calling someone, she came to her senses and quickly said no to him and stopped the attendant who was about to go back to deliver the order.

"To find the water veins, we don't need to go back to the mountains to fight. All we need to do is mobilize the Jinfu servants and dig a long trench along the Fuefuki River and Nirasaki Castle. The remaining ministers will have their own ideas." Xiaoping was full of confidence.

Seeing that Xiaoheita was so confident, Yamauchi Yoshiji had nothing to say, so he immediately mobilized left and right, gathered tools and mobilized various teams to dig long trenches.

Yamauchi Yoshikatsu saw the opportunity and got involved again, asking Xiao Pingtai what he could do. Xiao Pingtai could only dismiss him by saying, "The mountain man has his own clever plan." Just because he didn't tell him how to dig out the water veins made Yamauchi Yoshikatsu angry and wanted to punch him.

In just one day, a long trench close to 200 meters and two meters deep was dug. Thousands of people from each team were mobilized to do such a simple job. If there were not too few tools, it might be faster.

Koheita got a lot of straw from Hokkaido University, and the remaining part was bought from nearby private houses or robbed openly. It was worthless anyway, so it didn't matter. He also ordered the soldiers to go to the fields to collect dead branches and leaves. It is not easy to obtain fuel in early spring, so get as much as you can, just in case.

Then they arranged for the soldiers to spread straw fuel in the ditch and light a fire. A burst of fire burned through the north wind. Xiaopingtai arranged a person to observe every three to five meters, and soon discovered the strange phenomenon.

Due to the cold weather, the water temperature naturally existing in the outside world is relatively low, and the temperature under the ditch of more than two meters is naturally not much higher. But after setting a fire with straw, the fire's high temperature of hundreds of degrees penetrates the ground. When it encounters shallow water veins, the upper part of the groundwater will gradually boil. As we all know, water evaporates when exposed to heat, and gaseous water passes through thin The thin soil layer will condense into small water droplets when encountering the cold air of only a few degrees outside.

Soldiers can immediately determine the specific location of underground water veins by observing where water droplets appear on the mud walls of the entire long ditch after the continuous fire.

After a while, a soldier shouted. Koheita and Yamauchi Yoshikatsu hurried over, and sure enough, many small water droplets condensed on the wall of this section of the ditch.

Xiao Pingtai immediately ordered people to dig deeper here. Seven or eight warriors dug hard with shovels. The excavated soil flew in all directions, but they dug more than one meter deep, and the rolling river water continued to gush out from the bottom of the pit.

"It's really yours. How did you do it?" Yamauchi Yoshikatsu punched Xiao Pingtai, extremely excited. The samurai ashigaru from all sides also gathered around to watch the gushing river water.

How did Mrs. Xiao Ping explain to him the three states of water and the principle of evaporation and vaporization at high temperatures and liquefaction and condensation when cold. The problem of the three states of matter is just an ordinary junior high school chemistry application question in modern times. It is not difficult, but in ancient times it was difficult to explain it clearly. So Xiaopingta just smiled and pretended to be incomprehensible.

Seeing that Mrs. Xiaoping didn't want to say more, Yamauchi Yoshikatsu stopped asking.

He was just happy to inform his father that he could send people into the city again to persuade him to surrender. The water veins in the wells in the city had been completely cut off.

Please brother, please arrange it for me as much as you like!