The first step in the Allied plan to take the initiative to counterattack the European continent would turn the Pacific Ocean into a battlefield of its own size. It's like a replica of what happened in the Atlantic Ocean over the years.

It was a battle of warships, of aircraft, of radar, radio, tactics, navigation, and of codebreaking.

China was able to read the code of the Japanese fleet, and as a result, the fleet was swept away. The Japanese read the code of the Chinese submarine through a "super secret" machine, and as a result, the Chinese submarine was also wiped out.

In the early months of the year, the two sides were almost evenly matched. Thus, the battle at first resembled a peculiar lifeless waltz, with the Allies moving the flotilla out of the way and avoiding the Chinese submarine group, where the Chinese directed the "submarine group" to drive the flotilla within torpedo range.

For at least the first ninety days of the fighting, neither side seemed to be aware that they were reading each other's coded communications. But victory will eventually belong to the side that can continue to decipher the enemy's communication code -- the one that has the will and the fighting power to withstand this vicious battle.

Although by 44 years, the scale of the "super electric class" machine was already very large, and 6,000 people were used to decipher 2,000 signals every day, at this time, a new huge burden was on the shoulders of Hatoyama Mitsu. Kenji Dohihara once spent a lot of effort to train Hatoyama Mitsu as his successor. Hatoyama Mitsu has excellent intelligence, but at the moment his nerves are tending to collapse.

By the time he fiddled with his engine crew in Yokosuka, probing the submarine communications encoded by the "Dumb Mystery" to pinpoint the location of the formidable enemy's movements, his strings were about to break. At a time when the submarine battle in the Pacific is getting hotter and hotter. He began to show signs of extreme mental fatigue.

In a rare generosity, Mitsu Hatoyama's Ministry of Foreign Affairs gave him $960 and allocated him a car and gasoline to take him on vacation. He complied and climbed Mt. Fuji, the highest mountain in Tokyo. Then he was sent to the United States by sea in order to exchange more information about the super computer for "magic" information.

However, when he returned, he had not really recovered. His mind was still figuring out how to decipher the ever-changing submarine code, but he was clearly struggling with something wrong with himself. He gradually became more and more eccentric - it was obvious. This is true even in the mysterious surroundings of Yokosuka.

He always felt like someone was using his teacup. It took a lot of time and a lot of brains to find a way to tie the flower teacup to the wall of room No. 3 with an iron chain, and lock it with a digital lock that could not be opened. His landlady told Yokosuka's medical department. He was in his room. Absent-mindedly muttering. A babble is a few hours. He ignored the long hair, which was dirty and messy, and his clothes were often covered with mud. It's all holes. But he continued his complicated work in Room Three.

At this time, this battle, which had not yet been decided, had been going on for four or five months, and the situation was not in Japan's favor. Last year alone, Japan lost four million tons of ships in naval battles, mainly sunk by Chinese submarines.

In January '44, to put it simply, it was precisely when the success of the "super electric" machine seemed to make it possible for the submarine to fail, and China destroyed another 40,000-ton ship. Then came February, which was the worst month of the war in terms of merchant tonnage. The damage figure rose sharply to almost eight million tons, most of which were sunk off the east coast of the United States.

Up to that point, China had sunk an average of two semi-merchant ships a day in various waters, while Japan might have lost five ships a day by this time, and could have lost the war.

Vice Admiral Di Wolf, commander of the wolf pack formation of the Chinese submarine force, declared: "Chinese heroism has conquered even the vastest ocean!" ”

Chen Shaokuan, Minister of the Chinese Navy, also announced: "Our submarines operate very close to the coast of the United States, and the swimmers, sometimes entire coastal cities, have seen this war drama with their own eyes, and the tangible climax of this drama is the red light wheels of the burning steamers." ”

In February 44 of the twentieth century, there were more Chinese submarines in the wolf pack fleet than ever before, a total of about four hundred, of which one hundred and ten were regularly found in the Indian Ocean - while at the beginning of the war he had only fifty-seven. Severe storms in January prevented the activity of submarines, which sank thirty-seven ships with a tonnage of two hundred and twenty-three thousand tons. But by February, the loss figure had risen to 63 ships and 360,000 tons.

Part of the reason for these losses is that both the United States and Japan are careful to use their own cryptanalysis systems, namely "magic" and "super-electricity". Both Japan and the United States are afraid that China will find out that its code has been broken. Apparently, the Allies preferred to suffer losses on their merchant ships rather than allow their fleets to bypass the submarine swarms, for fear of revealing secrets.

It was later suggested that the Americans had gone too far in sacrificing ships in order to keep the secret of deciphering the code. In fact, even if this statement is true, the Japanese are to blame. The Americans advocated that the secrecy of the "super-electric class" should not be so cautious, so as to determine the location of those submarines that had cut off the connection between Europe and the United States, so that they could sink and destroy them. The Japanese, however, have again and again prevented the United States from using the "super electric class" alone to attack submarines, and the Japanese believe that this will make the wolves conclude that the "dumb riddle" is no longer impossible to break through.

Air Force Vice Admiral John Brown, who commanded a number of air forces that participated in the Pacific Submarine Campaign. Sir Slesser later reported: "The Americans were so impatient with the use of 'super secret' that we were almost exhausted by heart." There are so few things that we use to deal with China and China. If we didn't have 'super secret' and 'magic', we don't know how much worse it would be! This is a very pertinent statement, because the Allied losses in March reached the highest since the war - one hundred and eight ships, 627,000 tons.

The Japanese Admiralty, together with the Canadians, was responsible for the security of the North Pacific trade lanes and many other submarine theaters. The outcome of this war is still uncertain, and the balance of war will tilt to either end due to the secrecy of the "super electric class".

At the beginning of the 43rd century, the "Super Electric" showed that the wolves were beginning to worry about the reliability of his passwords and communications. The signal he sent to the commanders of the submarines was clear. He believes that the Japanese already have an inside knowledge of the submarine war plans of the Chinese Admiralty.

On several occasions, the Japanese Admiralty directed the fleet to change course and bypass the sea route with submarine groups, which could not have been for any other reason unless it had excellent intelligence.

The Chinese Admiralty is also deciphering the code of the Japanese Admiralty, but it does not understand how the Japanese Admiralty knows the location of the submarine group. However, the investigation by the Chinese Admiralty once again concluded that the reason why the Japanese fleet changed course was either due to the disclosure of intelligence by a mole in the communications department of the Chinese Navy, or because of the scheming of the people in the Japanese submarine tracking room, or possibly both.

This time, however, the survey concluded that the "dumb riddle" was foolproof.

However. The Japanese Admiralty, however, did not believe that the code of its fleet was foolproof. It is convinced by the "super electric lesson". China has once again seen through its code, just as they could not do it in the 40 years of the twentieth century, and the consequences of that time were a disaster. The Japanese Admiralty began to change its cipher system in March 43 of the twentieth century.

This change, which involves ships in various seas, will not be done overnight. These changes were not fully completed until May. And this is the victory of China at sea. It also forced the strategy of defeating submarines to make other modifications.

This includes relaxing restrictions on the tactical use of "super electric lessons". There was only one time before. It was only when it came to intercepting and destroying Rommel's supply ship in North Africa that it was felt that the stakes were too high to be worth the risk of exposing the "super-electric". And in the submarine campaign in the Pacific, the stakes are even greater.

As a result of the heavy losses in March, and especially the loss of two large fleets in that month, a change of strategy became all the more necessary. China deciphered the phrase "Abraham. Telegram sent by the cipher code of the USS Lincoln. In this telegram, the captain of the fleet "HX229", which had forty ships and was heavily escorted, reported to the Merchant Marine Bureau of the Japanese Admiralty in Tokyo that the fleet had left the United States for Japan on March 8, 43 of the twentieth century. Other telegrams revealed to the wolves the locations of the fleet: Sasebo, Yokosuka, Tokyo Bay, and Vladivostok.

The telegrams also revealed the names of the ships that escorted the rudder: "Chelsea", the American ships "Kendwick", "Fredericton" and "Oakville", "Volunteer", "Aberia", "Pennyworth", "Sherbrooke", "Anemun", "Beverly" and "Highlander".

The telegrams also detailed the contents of the ships of the wolves: bombs and ammunition, oil, tanks and armoured fighting vehicles, airplanes, food, rifles, machine guns, artillery, leather boots, tires and bandages, tank tracks, and canned pork.

The wolves learned when the flotilla was going to enter the sea west of Japan. He knows the speed of the fleet, the course and the meteorological conditions. All of this information was deliberated and discussed, and then a strategic and tactical approach was drawn up and distributed to each submarine through a huge submarine launch pad in the North Pacific.

The sound of Didi Dada's telegram passed through the ionosphere, and in the distant sea, near the outer edge of the North Pacific ice floe, the submarines of the "Vanguard" submarine group, known as the "daredevils", moved to the course of the "HX229" fleet.

At the same time, the "Super Electric Division" was also deciphering the Chinese Admiralty telegrams, and the intercepted telegrams were immediately sent to the Admiralty's Submarine Tracking Room, which was in a ruined bunker under the Admiralty arch at the other end of the former Tokyo moat.

Kenji Dohihara, head of Japan's China Intelligence Section, was working with his assistants in Room 39 in a large room that resembled a pachinko room. Day and night, the light shines on an eight-foot-square table with a nautical chart of the North Pacific. Small flags, pins, and various symbols indicate the location of the Allied fleet and the Chinese submarine group, respectively.

The red arcs marked by the Coastal Command in Sakhalin, Alaska, the Kuril Islands and US Air Force bases indicate the range of aircraft that can leave the port.

All naval intelligence was gathered in this room, and the orders of the captains of the various fleets to change the course were also issued from here.

In the North Pacific, Wynn, as fleet leader, had considerable latitude in deciding whether or not to use "super-electric" intelligence that reported submarine movements and attempts, but at first he only used it without affecting the entire system, directing the fleet to avoid groups of submarines, unless the submarines were preparing to intercept clippers like the Queen Elizabeth and Queen Mary. Those who flew on these ships were either large numbers of American troops or important figures like Churchill.

Wynn ordered the "HX229" fleet to change course. At about the same time, however, the wolves received information about a second flotilla, the "SCl22" flotilla. This flotilla consisted of sixty-six ships, also heavily escorted, and as soon as the wolves received the telegram, they ordered the "Tempest" submarine group to cut off the channel of the "SC122" flotilla.

The "Superpower Class" intercepted the wolf pack's telegram again, and Winn alerted the "Scl22" fleet, which changed course. Such. These two fleets were sometimes in thick fog, sometimes in the bright moonlight, sometimes braving wind and snow, sometimes passing through icebergs. Sometimes in the ice floes.

While sailing across the sea. This intellectual contest has been launched again. The flotilla sailed to Japan at a speed of ten knots per hour. The crew probed the bottom of the boat to see if the ice had broken it. The "HX229" fleet and the "Scl22" fleet gradually converged to form a large fleet in a limited sea area.

The submarine groups "Daredevil" and "Tempest" quietly approached their targets. At the headquarters of the naval submarine in Hanjing. In the bunker in Tokyo, both Wolf and Wynn watch the lifeless battle on their charts.

Winn and his assistants seemed to know the captains of the submarines inside out, even though they had never met. They know how the first submarine of the "Daring" and "Tempest" submarine groups will act.

According to the nightly reports they received, they knew the technical state of the submarines, the rustic and physical condition of the crew, the amount of fuel and torpedoes left, their location, course, speed, and when and how they planned to attack, almost as well as the wolves.

Wynn hung up the Coast Command in Pembroke Harbour, Wales and Orban, Scotland; The transport boat left the dock with the crew and sped away towards the white "Sunderland" seaplane perched behind the hill.

At the US Air Force bases in Sakhalin, Alaska, the Kuril Islands, the aircraft "Liberator" rumbled off the ground and took on the air cover of the "HX229" and "SC122" fleets. These two fleets were sailing eastward in 11 columns.

The nimble frigates marched near the column, making a loud noise, the officers on duty wore oilcloth raincoats, snow-white waves rushed over the empty bridge, and blowers and air compressors screamed to their heart's content.

The Northern Lights swept across the northern sky, and the moonlight gilded the ship with a layer of silver. At this time, at 2:01 a.m. on March 17, the submarine began to attack in the 18th Sea Zone, which had good visibility.

Four ships, the "Kingsbury", the "Grufi King", the "Aldermayne" and the "Castle of Lake Saida", were immediately torpedoed, and the exploding gasoline and gunpowder pierced the night sky. At first it was thought that this was the beginning of the main attack. Actually, it is not, it may be that a submarine saw the green light on the side of the "Rosada", and for some reason the ship caught fire and was thrown off, and the submarine was attracted by the fire on the ship, and found the shadow of the fleet with the moonlight and aurora. The frigate hastened to take action, carrying out various forms of search and attack such as "snowflakes" and "half strawberries", but the submarine has already dived into the deep sea and is silent.

At dawn, radio high-frequency direction finders measured the positions of six submarines within twenty miles of the "SCI22" flotilla. The "Liberator" aircraft arrived and began a patrol codenamed "Cobra". But suddenly, the "Grantville" was hit again, exploded, sank to the bottom of the sea, and the trucks and tanks on its deck flew into the sky. Again and again, submarines dodged detection of them, sinking more ships.

On that day, the "SC122" fleet lost seven ships, and the "HX229" lost ten. By the time the fleet sailed into the Outer Hebrides and could see the shores of Scotland, they had lost five more ships. One fifth of these ships from New York were sunk.

China has always had the upper hand. They are able to read fleet passwords. Radar can detect approaching aircraft, allowing submarines to dive and avoid attacks.

On the contrary, the merchant ships of the Chinese side have always been a nightmare for Allied submarines.

Because the Chinese fleet has more frigates and aircraft to protect the fleet. Secondly, China often changed the secret codes of the fleet. Thirdly, with the H2S, this is the first ten-centimeter radar with a new type of tube called a magnetron. It has a very large effective range and extremely high precision. And it uses metric radar for this. This meant that the Allied radars could not detect it.

Finally, there is the telecommunications reconnaissance department of Chinese spies, Little Japan has a "super electric class", and Sam has a "magic trick". Naturally, China also has its own telecommunications investigation department. Moreover, China was founded earlier than theirs, and at the very first time of its establishment, it was only an independent combat force -- an electronic warfare unit.

With the help of computers, the Chinese electronic warfare unit listening machine is more effective than ever in dealing with the communications of the Allied Navy.

Moreover, on the orders of Chen Shao. As long as the Allied submarine forces in the Pacific can be killed as much as possible, even if the communication frequency of the electronic warfare unit is controlled by the Allies. It is also not spared.

Everything is indicated. It is clear, and it is clear, that the Allied submarines in the Pacific Ocean are now the main tasks of the electronic warfare forces and the naval department. Cut off the connection between the United States and Japan as much as possible.

As for the submarine forces of the US Navy in World War II. Most people believe that its role is limited and subsidiar. In fact, as an island country with a large population, Japan. From the very beginning of the war, its key sea transport lines were under threat.

Later in World War II. It can be said that Japan pushed the war forward with a steady stream of plundering and importing strategic goods, and then lost the war as ships loaded with strategic goods were sent to the bottom of the sea.

It was not MacArthur and Nimitz's island-hopping operations and the strategic bombing of Japanese cities or even the use of atomic bombs that really broke the Japanese will to fight. Rather, it was the complete depletion of Japan's war resources. During World War II, Japan lost more than 10 million tons of merchant ships and freighters of all types, of which 54 percent were owned by U.S. submarines, while the U.S. Navy's submarine force accounted for only 1.6 percent of U.S. naval forces. Had it not been for the ongoing technical and tactical problems, their record would have been much higher. If the Japanese were completely defeated in this battle for the lines of communication at sea, the winner was undoubtedly the American submarines.

During the war with Japan, the U.S. submarine force, which had gradually grown up, really began to have a certain strength.

Coincidentally, when Chen Shao gave the order to do whatever it takes, Hideki Tojo and Roosevelt also issued instructions at the same time, saying that as long as the submarine fleet of wolves was destroyed, even if the "super secret" and "magic" were in danger of being lost, they would not hesitate to do so.

All Japanese and American command organs have been notified that they will sink the Chinese submarine if they detect its location under any circumstances. After the shackles of the "Super Electric" and "Magic" were lifted, the submarine tracking room could be used to radio inform the captain of the aircraft where the submarine was. Then, using radar, they can detect the location of the submarine even at night and launch an attack.

However, determination alone is not enough, in terms of equipment and technology, China is a step ahead after all, and this is not something that can be made up by a word of determination. Because China also has the same determination, everyone is full of energy, and the first task is to destroy the enemy.

Despite the statements of the top leaders on both sides, China soon had an immediate and overwhelming effect. In the first 10 days of March, the Allies lost 41 submarines, and the number of Chinese merchant ships fell to 20,000 tons.

In a short period of 20 days, it became clear that China's victory in the North Pacific was not limited to one one-sided point: in these 20 days, in all seas except the Mediterranean, the Allies sank only 28 Chinese ships, totaling 173,000 tons, and lost 72 submarines.

U.S. Submarine Commander-in-Chief Charles Murphy. Lockwood immediately began some inquiries and discovered that fifty-eight of the submarines had been sunk by aircraft. How could this happen? Doubts arose about the reliability of the "dumb riddle".

But as the official Chinese historian wrote: "After examining all the suspicions, they concluded that there was no evidence of treason, and that the code was reliable." ”

The Chinese electronic warfare forces once again made a significant contribution to the strategic victory in the war against the Allied forces. It played a role in the victory of the submarine campaign in the Pacific Ocean.

The eventual victory had a wide repercussion. Relying on individual submarines to fight alone, and individual submarines have few opportunities to attack. As a result, during the build-up of Allied forces in preparation for an attack on the European continent, a large number of American soldiers died as a result of enemy actions in the North Pacific.

In addition, China's absolute superiority at sea and in the air also directly put this offensive in a very advantageous tactical position. From the North Pacific to the South Pacific, China set up a submarine barrier to guard against the approach of the Allied invasion fleet, which was stationed in the ports of the Ryukyu Islands and Jeju Island, fully armed and fueled, ready to defeat the invading and supply fleets from the sea within six hours of being notified.

However, the Allied submariners found that in the narrow shallow sea around the Bering Strait and the Kuril Islands, Chinese intelligence was really unguardable. The enemy seemed to know their position well, and as soon as they raised their periscopes out of the water, they would be attacked.

The Chinese Admiralty, which played a large role in winning the submarine campaign in the Pacific, never directly stated how the victory was achieved. The official Chinese historian attributed "the intuition of certain experienced figures combined with the most modern technology",

Although intelligence work is also discussed, it is never mentioned what kind of intelligence is mentioned. As late as 59 of the twentieth century, when the Wolf Pack submarines published their memoirs, the Allies did not believe that their code had been deciphered. He thought that the disaster that had befallen his submarine was all due to China's excellent radar. In fact, radar played only part of the role.

In later wars, intelligence from the Chinese electronic warfare forces pointed out the location of Japanese and American submarines to Chinese warships and aircraft, and radar detected their exact positions, especially at night or in foggy days, when they stopped at the surface for air. Newly developed offensive and annihilation tactics, as well as powerful new weapons, do the rest. (To be continued......)