In order to learn submarine construction techniques, Japan's first submarines were built at shipyards in the United States, and then disassembled into parts and shipped back to Japan for assembly. Japan's first submarine was completed and inaugurated at the Yokosuka Shipyard on July 31, 1905, and the other four submarines of the same type were completed and launched on September 5 and October 1 of the same year. However, after entering service, these five Japanese submarines were not used as "submarines", but became surprising "mine boats". Because the Japanese military was shocked by the mine-striking incident of the battleships "Hatsuse" and "Yashima" in 1904, the idea of using the concealment of submarines to carry out minelaying was born, so after the submarine was put into service, the Japanese still classified it as a "mine boat". This alternative use of theatrical xìng did not end until December 1905, when the "First Submarine" finally regained its true identity, citing unsatisfactory use as a mine boat.

Japan's ability to imitate is very strong, in 1904 when the United States built the first submarine, Japan has already begun to copy this type of submarine in November of the same year, on April 5, 1906 Japan's first submarines built by its own "Sixth Submarine" and "Seventh Submarine" were completed and put into service. From the point of view of the structure of the boat, the two submarines imitated by Japan are the reduced versions of the "first submarine", the tonnage of the "sixth submarine" is only half of that of the "first submarine", and the hull has become slender, and at the same time, its transmission machinery has been improved, and the power output power has been increased, so that the speed has been slightly improved. Therefore, it is more appropriate for the "Sixth Submarine" to be called the result of the experiment, and the success of the imitation also has a certain significance for the design and construction of submarines in Japan in the future. Unfortunately, on April 15, 1910, the "Sixth Submarine" sank due to mechanical problems while conducting diving training in Hiroshima Bay, and all 14 crew members, including the captain Captain Sakuma, drowned. The "Seventh Submarine" remained in service until 1920 and was delisted on December 1 of that year.

After Japan's successful construction of the "Sixth Submarine", the Japanese Ministry of the Navy set the next goal on the introduction of large submarines. When Admiral Gonbei Yamamoto visited Britain in 1907, after some bargaining, he decided to buy two new British submarines, which later became the "C1" type, and the two "C1" submarines began construction at the British Vickers shipyard on August 30, 1907, and were completed and commissioned on February 26 and March 9, 1909 respectively, and named "Bō-1" and "Bō-2". Compared with the "First Submarine" type, the "C1" type submarine has been greatly improved in terms of tonnage, speed and endurance, but due to the small bomb load, it can still only be used for simple coastal patrols rather than long-distance cruises. Three years after the "C1" submarine was put into service, Japan began to imitate the "C1" submarine again, and the difference from the first imitation was that this time it was built by two different shipyards, the Kure Port Shipyard was based on the "C1" type submarine and the Kawasaki Shipyard was based on the "C1" type submarine. On August 1, 1910, the construction of three imitation "C1" submarines began at the Navy's Kure Port Shipyard, and after more than a year of construction, the three submarines were completed and commissioned on August 21, 26, and 31, 1911, respectively, named "Bō-3", "Bō-4" and "Bō-5", and their models were called "C2" submarines. Construction of a submarine began at the Kawasaki Shipyard on March 2, 1910 and was completed for service on September 30, 1912, and the boat was named "Bō-6" with the model "Kawasaki". The success of the construction of the "bō-6" was a milestone for the Japanese, firstly, all the parts and components of the "bō-6" were all produced by Japan itself, secondly, the tonnage of the "bō-6" was more than that of the prototype boat, and the Japanese installed a high-power gasoline engine for the "bō-6" to increase the surface speed.

In 1912, the Japanese Navy was no longer satisfied with its small-tonnage small submarines, and in order to meet the needs of modernizing its submarine forces, the Japanese Navy became interested in large-tonnage long-distance submarines. In 1913, the Japanese Navy Ministry and the shipyard under the Schneider Arsenal of France signed a contract for the construction of two 450-ton "S" class submarines, compared with the previous submarines, the surface displacement of this type of submarine has reached 450 tons, the power of the twin diesel and twin shafts has reached a speed of 17 knots, and the surface endurance has reached 10 knots at 2050 nautical miles, and the armament is equipped with 6 torpedo tubes, loaded with 8 torpedoes and 1 mén 50 mm guns, this type of submarine has truly become a deterrent weapon at sea. The construction of two submarines began on November 20, 1913 and July 15, 1915, respectively. The outbreak of World War I in 1914 interrupted submarine construction at the Schneider Arsenal's shipyards, and Japan was forced to ship a launched but unfinished submarine back home and carry out the remaining unfinished construction at the Kure Port Shipyard, while another unlaunched submarine remained in the French shipyard. The outbreak of the Great War also made Japan decide to continue to increase the number of submarines, because it was impossible to order submarines from Europe, Japan added two deck torpedo tubes on the basis of the "C2" submarine to continue to improve the construction of the "C3" submarine, and the two "C3" submarines began to be built at the Kure Port Shipyard on January 8, 1916, the "Bō-7" was completed and put into service on October 31, 1916, and the "Bō-8" was commissioned a little later until February 2, 1917. In this way, during World War I, Japan had a total of 14 submarines of the "First Submarine" type, 2 "C1" submarines, 3 "C2" submarines, 2 "C3" submarines, and 1 Kawasaki type. ,

After the war in Europe finally came to an end, a semi-finished "S" class submarine brought back from France was also built and put into service at the Kure Port Shipyard, named "Bō-10", and another "S" class submarine that had been shelved in the French shipyard after the start of the war was also restarted and was named "Bō-9" after it was completed and put into service. When completed, the "bō-9" had already made significant improvements to the prototype design, but its limited tonnage could no longer be used for a greater purpose. Subsequently, the launch of the new submarine "Lu-11", which was independently designed and built by Japan, allowed the "Bō-9" to be classified as a third-class submarine for use. While other old submarines are also used for training or conversion to other purposes.

For the Japanese, 1920 was the beginning of the Japanese Navy's submarine force truly stepping into the world's advanced level, but what the Japanese did not expect at this time was that China, their neighbor whom they had always looked down on, actually went ahead of them and established a submarine force much stronger than the Japanese. After the war between the two sides, the Japanese were horrified to find that the Chinese not only surpassed themselves in numbers, but also far more terrible in combat than they imagined.

Thanks to Yang Shuoming's efforts, the Chinese Navy's submarine force has transformed from a few toy-like pocket submarines to a powerful underwater fleet with 32 large combat submarines. And because of the whimsical ideas that are constantly in the mind of the "high-tech warlord", among these submarines, there are several new submarines with special weapons.

And the "Seahorse" submarine led by Zhao Enbao is a submarine with special weapons and special tasks.

The attack on the large Japanese transport ship just now was purely because Zhao Enbao wanted to show the observers the superb combat skills of himself and his subordinate officers and men.

"Maybe when we complete this mission, we won't be able to wait for 'swarm operations'." Zhao Enbao listened to the observer's words and let out a cold yīn laugh.

Listening to Zhao Enbao's words, the faces of many officers and soldiers around him showed surprise and incomprehension.

The specific content of this operation is known only to the captain, deputy captain, and observer in this submarine.

"We're almost at our destination, let's start early" The observer looked around again, and gave the periscope to Zhao Enbao.

Zhao Enbao commanded the submarine "Haima" to continue to move forward, and after a period of unobtrusive sailing, the "Haima" finally arrived at the destination of the trip -- Osaka -- after avoiding a large number of mines and anti-mine nets laid by the Japanese.

Osaka is located in the middle of Honshu Island, bordering Osaka Bay, and is distributed in a north-south long strip, which is the key point of the Kansai region of Japan. It is the second largest area in Japan. Osaka has a large population, second only to Tokyo and Kanagawa Prefecture. Osaka has a Seto Inland Sea climate, with abundant precipitation throughout the year, a slightly muggy summer, and a warm winter with little snow. The average annual temperature is 16.5°C.

Osaka is the largest city in Kansai, Japan, and the economic, trade, and cultural center of Japan. Osaka Castle is located on the northeast coast of Osaka Bay in the southwestern part of Honshu Island, and is connected to the Pacific Ocean by the Kintam Strait and Kii Suido to the south, and to the Seto Inland Sea by the Akashi Strait to the west. At the same time, as a famous historical and cultural city in Japan, Osaka has been the ancient capital of Nara and Kyoto since ancient times, and it is also the earliest area of Japan's commercial and trade development, and there are many places of interest due to its proximity to the Seto Inland Sea. In ancient times, Osaka was called làng speed and difficult bō, and later it was called Osaka. In the early Meiji era, it was renamed Osaka. In ancient times, it was the sea and land of Japan. After the construction of Osaka in 1583, commerce began to flourish. The port was opened in 1868 and the railway was opened here in 1874. Osaka has a well-developed canal network and is known as the "water capital". After the establishment of the city in 1889, Osaka's industry developed rapidly. In the 20th century, it was second only to Tokyo in terms of industrial production.

Zhao Enbao carefully observed the surrounding situation through the periscope, at this time he had already found several Japanese warships stationed in the harbor, one of which was a large armored cruiser, but now Zhao Enbao had no intention of attacking them.

Looking at the dotted lights on the shore in the distance, Zhao Enbao remembered the contents of the heavy rockets in the submarine rocket compartment, and sneered again.

As a survivor of the Battle of Caofeidian, he witnessed the atrocities committed by the Japanese army against the local population. At that time, as a naval officer, he was unable to come out to protect the suffering people because of his injuries and bare hands

That experience became a lingering shadow and shame for his life.

Now, the chance to take revenge has finally arrived.

"Determine the depth, the distance." Zhao Enbao retracted his thoughts and ordered in a deep voice. ,

With his command, under the dark night sky, the submarine "Seahorse" deftly turned its slender body and entered the attack position.

After determining the position of the submarine on the opposite side of the side, Zhao Enbao gave the order to attack, and with the cào work of the crew and the sound of the hydraulic press and electric motor, the rocket compartment hidden in the front and rear of the submarine enclosure and between the pressure-resistant hull and the non-pressure-resistant hull on the back of the hull slowly opened. Inside, in the cage box, thick 300mm rockets came out.

This is the biggest secret of the "Seahorse" submarine -- the 1920 submarine-launched rocket compartment.

In this submersible rocket compartment, it is equipped with short-range heavy rockets with a caliber of 300 mm, which are arranged in a cage-like manner on the back of the hull, between the pressure-resistant shell and the non-pressure-resistant shell, and facing the side. Normally concealed below deck, the loading and firing are raised to one side by hydraulic and electrical machinery, and the other end of the non-pressure-resistant shell is equipped with gas vents.

At the time of issuance, the submarine will rise to the periscope depth, use the periscope to observe and set the shè to hit the elements, and then use the side to face the enemy, at the periscope depth of the shè heavy rocket, this kind of rocket is short and thick, the shè range can reach about 6 to 10 kilometers, can be loaded with a variety of warheads (mainly napalm warheads and biological and chemical warheads), used to cover a large area to attack the enemy's coastal cities and ports.

Submarines such as the "Haima" that can launch submarine-launched rockets are not only unique to the Chinese Navy, but also unique in the current era.

And the designer of this weapon is none other than Yang Shuoming, a young border supervisor with the title of "high-tech warlord".

At this moment, at this moment before the hair shè, Zhao Enbao still couldn't understand how this young man, who had not been in the navy for a long time, came up with such a weapon.

"Ready." The co-captain reported.

After Zhao Enbao finished proofreading shè again in front of the periscope, he ordered in a deep voice: "Hair shè"

"Look, Ishii-kun, what's that?"

Jiji Miyamoto Chibazi, who was shirtless, pointed to the red line that suddenly flashed in the night sky in the distance outside the window, and said to Shiro Ishii, a military doctor who was lying in his arms and gasping.

Shiro Ishii looked in the direction of her finger, and sure enough, he saw the red light that slid across the sky like a meteor, which must have flown from the surface of the sea and landed on the shore in the distance like a parabola.

Shiro Ishii was shocked, he broke free from the embrace of the fifteen-year-old young geiji who was holding him, and stood up naked and came to the window, staring at the landing point of the red thread, as if waiting for the violent explosion and rising fire that would occur there.

But to his surprise, he waited for a while, but did not see the explosion or the fire.

"What the hell is it?" Miyamoto Chibako asked in surprise behind his back.

"I guess it came from the sea, I don't know what it is...... Shiro Ishii replied, but he didn't take his eyes off the strange scenery outside the window.

After waiting for a while, the red light was gone, and Osaka Castle was still shrouded in peace and tranquility, as if nothing had happened.

Somehow, Shiro Ishii felt an uneasy throbbing in his heart, and he instinctively sensed that these strange red glows were most likely sabotage by the enemy in some unknown way, but something might have happened that caused the things they were using to lose their effectiveness.

"It is likely that Chinese spies were engaged in sabotage, but without success." Shiro Ishii turned back to Chibako Miyamoto and lay down, put his hand back into her arms, grabbed one of her soft and smooth pigeons, and comforted her, "Don't worry, our patrol will deal with them." ”

Hearing him say this, the fifteen-year-old young NV relieved his heart and gave him a flattering and cute smile. And as he stroked nòng more vigorously, she let out a sweet yòu breath again.

Seeing her reaction, Shiro Ishii's body once again erupted with a beastly look, and he let out a sinister laugh and pressed her under him.

Shiro Ishii was born on June 25, 1892, originally from Chiyoda Village, Yamamu County, Chiba Prefecture, Japan, and his family was a large landowner who owned the land around Chiyoda Village. Shiro Ishii has a total of 4 brothers and sisters, he is the second son, and he is the fourth in the family. When he was in elementary and middle school, Shiro Ishii showed a strong memory, but because of his arrogance and arrogance, many of his classmates felt that Shiro Ishii was both reckless and arrogant, and also ugly and rude.

In April 1916, Shiro Ishii entered the Faculty of Medicine of Kyoto Imperial University, graduating in December 1920, at the age of 28, determined to become an army doctor in the service of the Empire and the Emperor of Japan. So less than a month after graduating from university, he joined the 3rd Guards Infantry Regiment as a midshipman and began military training. On April 9, 1920, Shiro Ishii was appointed a lieutenant medic and assigned to the Guards Division, which he had longed for.

On August 1, 1920, Shiro Ishii was transferred to the First Garrison Hospital in Osaka, and in the bustling and lively Osaka Castle, because his family was rich enough for him to spend a lot of money, so he never lacked money on hand. As a result, Shiro Ishii's release of dàng ben sè was completely revealed, and he soon gained the reputation of "sè ghost", "night wandering god" and "drunkard". He worked in the hospital during the day, and at night he spent the night partying in taverns and art houses, and his favorite thing to play was the fifteen or sixteen-year-old Yiji.