There is still a technical problem in the plan to rescue Pang Tong formulated by Lu Bu.

That is, it is easy for their fleet to enter the fat water from Chaohu Lake.

However, if you want to enter Hefei City through the water without disturbing the defenders in the city, it is almost impossible to complete.

Lu Bu thought of this problem and then summoned Zhou Yu and Gan Ning to ask them if they could have a solution.

Gan Ning smiled and said, "Reporting to the lord, a kind of diving boat has been made in the navy. The entire boat sank about half a foot below the water and can't see the diving boat from the shore. We can use the diving boat to sneak into Hefei city."

"After the award is rescued by Pang Tong and Pang Tong's old mother, they will send a warship to support outside Hefei City, which will ensure that everything is safe!"

What?

Now the navy actually built a submersible ship?

In fact, a submersible boat is the prototype of a modern submarine!

Of course, the submersible ships in the navy are definitely not comparable to modern submarines.

But at least it is enough to deceive the shore defenders' attention.

However, what made Lu Bu quite curious was how they thought of making a diving boat.

Because as far as Lu Bu knows, in the original historical trajectory, the launch of real submarines will be postponed to at least 1,340 and half a year later.

But soon Lu Bu remembered that this idea seemed to be provided to the shipyard by himself.

As early as when the shipyard started to build ships, Lu Bu transferred various modern shipbuilding concepts to the shipyard technicians.

Of course, the advanced ideas instilled by Lu Bu are all technologies that can be realized during the Three Kingdoms period.

At that time, it seemed that Lu Bu had mentioned the principle of a submarine.

After that, Lu Bu basically never asked about the shipyard.

Unexpectedly, they actually built the diving boat.

After having the diving boat, they could sneak into Hefei City without knowing it and go to rescue Pang Tong.

However, for a moment, it was really hard for Lu Bu to imagine what the diving boat they built would look like.

Now even Lu Bu is beginning to be curious.

Then, under the leadership of Zhou Yu, Lu Bu personally witnessed the diving boats of this era.

After seeing the diving boat, Lu Bu had to admire the ingenious craftsmen of this era.

The diving hull is very small. After people enter, the internal space is completely closed and can only accommodate four or five soldiers.

The air required for breathing is solved by directly connecting to the water surface through a ventilation hole.

The acquisition of vision is also achieved through a periscope.

Therefore, this diving boat is actually in danger of exposure during the day.

In fact, it cannot be considered a submersible boat in the strict sense.

The power of the diving boat advances is to use propellers with human-powered shaking cranks to complete, and the speed is quite slow.

Under the calm water, the speed is about the same as the speed of ordinary people walking quickly.

At present, the practical effect of the diving boat is very poor.

There are too many disadvantages, very slow speed, very few layoffs, and are easily exposed during the day.

And because we need to maintain the absolute enclosure of the internal space, every entry and exit is a very troublesome thing.

There is still a long way to go to push the diving boat into practical applications.

However, no matter how many shortcomings there are, at least it will be useful when rescuing Pang Tong now.

Originally, Lu Bu was preparing to send soldiers from the War God Camp to rescue Pang Tong.

But in the end, I chose the navy.

Because apart from naval soldiers, the soldiers of the War God Camp did not control the submersible ship at all and had no relevant experience.

In the end, Lu Bu decided to lead the team himself, dispatched fifty navy troops to infiltrate into Hefei City.

...

That night, Lu Bu dispatched a hundred warships and entered Feishui from Chaohu Lake.

Then, ten miles outside the entrance of Feishui entered Hefei City, lifted fifteen submersible ships out of the transport ship.

After all the soldiers entered the cabin and were completely sealed, they were then placed one by one in the fat water.

Then, fifteen submersible boats quietly sneaked into Hefei City underwater.

It took about half an hour for a ten-mile journey.

Then, fifteen submersible boats entered Hefei City with openness from under the noses of the defenders of Hefei City.

Liu Yao had long heard of all kinds of magical legends about Lu Bu, and now he knows that Lu Bu's army has just been driven out by them.

Now the people on earth - uh, the Han people know that the god of war Lu Bu likes to attack the city the most, and he succeeds repeatedly, and rarely loses it.

Therefore, Liu Yao's defense in Hefei City is very strict, and basically used one-third of his troops to defend.

But what Liu Yao never expected was that their enemy had sneaked in from underwater without knowing it.

Entering Hefei City, the diving boats approached the courtyard where Pang Tong was house arrested through the crisscrossing waterways in the city little by little.

The existence of Pang Tong is not a secret in Hefei City, and many people know it.

At least it is not difficult to find out if you are inquiring carefully about the courtyard where Pang Tong’s old mother is under house arrest.

Liu Yao was basically not prepared for this news.

Because he never expected that someone would sneak into the city to rescue them.

Therefore, these news have long been passed on to Jia Xu by the staff of the CIA.

Then, Lu Bu stopped in a very close distance from the courtyard where Pang Tong was placed under house arrest, and the surrounding area was full of water and plants, so he stopped in a rather hidden place.

Then the inner wall of the diving boat will be expanded and the buoyancy will be increased, and the diving boat will slowly rise up.

It took another half an hour before everyone climbed out of the diving boat and leaned all the diving boats to the shore to hide them.

Lu Bu left ten naval troops to take care of the submersible boats, led the remaining forty naval troops to quietly approach the courtyard where Pang Tong's old mother was placed under house arrest.

The defense in Hefei City is also very tight.

However, the strict place was in the governor's mansion, and Liu Yao was afraid that Lu Bu would take a beheading operation.

As for the defense in other places, it is relatively weak.

After all, it was impossible for Liu Yao to send all his troops out and put the entire Hefei city in martial law.

If this is the case, then his soldiers don’t have to want to rest, and they will be exhausted even if they are tired.

Therefore, under the leadership of Lu Bu, they easily touched the courtyard where Pang Tong's old mother was under house arrest.

Through observation, it was found that there were two teams of soldiers outside the courtyard.

The two teams had a total of twenty soldiers.

If the warriors from the War God Camp this time were the best at killing people silently.

It is absolutely easy and pleasant to have forty people secretly dealt with twenty enemy troops.

But now what Lu Bu brought was a navy army and was not good at this.

Therefore, the task of solving twenty enemy troops can only be handed over to Lu Bu to complete.

Fortunately, in order to better monitor, the two teams of soldiers were relatively scattered. Otherwise, it would be difficult to solve so many people alone by Lu Bu.
Chapter completed!