Yokohama, who had just received an order from Gonbei Yamamoto, hurriedly dismantled the advanced equipment for heavy industry, but before the people in the factory began to transfer materials and dismantle the equipment, the artillery fire of the Third Fleet had already engulfed this industrial area.

Gonbei Yamamoto, who heard the news, did not show any disappointment, and after the enemy shelled Tokyo, it would certainly not be placed in Yokohama, which was on the side.

Fortunately, the main technical experts in Yokohama were transferred in time, otherwise it would really be empty of people and money.

And the actions of the Third Fleet also sounded the alarm for Yamamoto Gonbei that the enemy was already in action.

The transfer is far slower than the destruction, and Yamamoto Gonbei, who is well aware of this, has issued another directive to give priority to the comprehensive rescue of all military industries.

If you want to win the decisive battle on the Japanese mainland, you need the support of industry, after all, this is no longer the era of war with big swords and spears.

It is the heat weapons that decide the outcome of the war, and sooner or later it will be over without guns and bullets.

The Japanese in the major industrial cities and major industrial areas are all busy.

A large number of Japanese took part in the dismantling and operation of the equipment, and many fishing boats were recruited, and mines were loaded onto the fishing boats, even if some of them could only be loaded with one mine.

A few hours later, mine after mine was thrown into the sea, most of which were anchor mines, which were also the main types of mines of this period.

These anchor mines are anchored in about the same position by the anchor, and the mines floating in the water have different depths.

Tactile fuzes, specially measured water depths, are used to arrange these anchor mines, mainly for warships with drafts.

Especially for 10,000-ton battleships, the draft is the favorite position for these anchor mines, not to mention the dreadnought first-class battleships with a deeper draft.

If Fan Yize hadn't chosen to attack Tokyo Bay in the first place, once Tokyo Bay was covered with mines, the Third Fleet would not have wanted to approach Tokyo Bay safely, let alone shell Tokyo.

However, Nagoya Bay and the Kanmon Strait, which leads from Kitakyushu to the Seto Inland Sea, are the most heavily mined areas.

The Kanmon Strait, located between Japan's main island of Honshu and Kyushu, is the only northern shipping route that directly enters the Seto Inland Sea from the Tsushima Strait.

During the Edo period, in order to speed up the flow of goods between the islands of Honshu and Kyushu, a Kanmon Bridge was built in the Kanmon Strait, which connected the Japanese islands of Honshu and Kyushu.

As the Second Fleet approached Kitakyushu at full speed, a number of Japanese ships were also heading towards Ohashi, tasked with blocking the narrowest of straits.

After receiving the news of the shelling of Yokohama, Gonbei Yamamoto immediately thought of the Second Fleet in Sasebo, and immediately thought that the Second Fleet would most likely pass through the Kanmon Strait and enter the Seto Inland Sea.

In view of this, Gonbei Yamamoto immediately ordered the navy, at all costs, to block the Kanmon Strait.

However, it is not easy to blockade the Guanmen Strait, because the narrower the sea area, the faster the deployment of mines, but the faster people will clear mines.

There was simply no time to stop, so the Japanese Navy considered placing mines outside the entrance to the Kanmon Strait.

Kitakyushu faces the Tsushima Strait and is the most stockpiled of any Japanese city, after all, the Russo-Japanese War was opposite Russia.

A large number of mines were loaded from Kitakyushu and put on, and after several hours of preparation, dozens of Japanese ships left the port of Kitakyushu and headed for the entrance to the Kanmon Strait.

At the same time, the Second Fleet had once again entered the Tsushima Strait, and the commander of the Second Fleet, Rear Admiral Guo Shaohua, was aboard the flagship No. 103, waiting for the report of the destroyer fleet.

The faster destroyer was sent out as soon as he received Fan Yize's order.

Originally, the plan of the Second Fleet was to go to Kitakyushu immediately after assisting in the capture of Sasebo.

By the time Fan Yize's order came, the Second Fleet had already left Sasebo for several hours.

It's just that the Second Fleet is not yet clear about Gonbei Yamamoto's series of actions, and it is impossible to analyze the actions of the Japanese side.

When receiving the order from Fan Yize, Guo Shaohua also fully realized the importance of the matter, and immediately asked the destroyer fleet, which was already in front, to go to the Guanmen Strait as quickly as possible, not only to defend the Guanmen Strait, but also to protect the integrity of the Guanmen Bridge.

Because Japan wants to hold the Guanmen Strait and prevent the Second Fleet from passing, there are two ways, one is to place mines at the entrance of the strait, and the other is to directly blow up the Guanmen Bridge.

At this time, the Guanmen Bridge was not a brand-new sea-crossing bridge that was rebuilt decades later, and the materials and steel used were not comparable to those of this era.

The Guanmen Bridge in this era is still a sea-crossing bridge, but the piers and bridge body are very large, and they are not as thin as the bridge decades later.

The waters of the strait where the Guanmen Bridge is located are originally the narrowest and shallowest places in the strait.

Under normal circumstances, battleships can pass through this place, but once the bridge is blown up front and rear and falls into the thick bridge of the strait, this shallow and narrowest waterway will be intercepted, not to mention that the battleship cannot pass, even the cruiser cannot pass.

With this in mind, Guo Shaohua added an order to protect the bridge.

However, the Japanese did not have the idea of blowing up the bridge to block the fleet's access to the inland sea, because the bridge was the only land link from Honshu to Kyushu, and the Japanese army wanted to pass through it and go to Kyushu Island to fight the enemy in a decisive battle.

Therefore, the Japanese only wanted to block the entrance to the Guanmen Strait, and the ships loaded with mines were already close to the entrance to the Guanmen Strait.

In the distance, two destroyers cut through the waves, and at a speed of 32 knots, they rushed towards the Guanmen Strait.

There had to be a race against time, even if it was a few hours before the Japanese, and there was no delay of half a hour.

On the sea near the entrance of the Guanmen Strait, a light rain fell, the sea breeze blew, and the undulating waves on the gray sea were nearly half a meter high.

With this wave height, the destroyer's advance is still smooth, not like a roller coaster.

However, the Japanese ships near the entrance of the strait were different, they were only small boats of several tens of tons, and under the waves of more than half a meter, the ups and downs, coupled with the danger of mines, the speed of the ships could only slow down.

This is fast and slow, as if God is helping the Red Police Corps.

Eventually, however, it was the Japanese fishing boats that were the first to reach the entrance to the strait, and one by one the ships dispersed at the entrance to the strait, ready to start laying mines.