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Although the Germans lost many elite troops in the Battle of Stalingrad, the strength of the Allies skyrocketed again after the landing of American troops in Europe. www.biquge.info The addition of the new American force suddenly made the situation worse for the Soviet army.

The U.S. Army quickly replenished the vacuum area lost by the Germans and led the Allied ** team to block the Soviet counterattack. On the battlefield of the Soviet Union, although the Soviet Army relied on the M28A3 main battle tank and the stabilized tail shelling armor-piercing projectile to severely damage the German Tiger tank, but the Soviet Army lost the same huge number of tanks, if it were not for the German Army's Tiger tank number and insufficient production capacity, the Soviet Army could not defeat the German army at all, after all, the M28A3 main battle tank that the Soviet Army relied on was only a medium tank, and the German Tiger heavy tank was not of the same level, and the advantage obtained by the firepower of the armor-piercing bullet was not enough to maintain it for a long time.

With the departure of the U.S. Ground Self-Defense Force to the Soviet battlefield to participate in the war, the U.S. Army's M4 main battle tank is also a medium tank, its speed, firepower and armor are stronger than the Soviet T34, and the Soviet Army's M28A3 tank is slightly inferior in speed and armor, but the 75mm gun carried by the M4 tank is more powerful than the M28A3 tank.

But that's not the point, what really makes the Soviets sad is that the Soviets think that their tank production overwhelmingly exceeds that of the German army, and that they can win by quantity. However, this will not work for the US military, which has produced more than 30,000 M4 main battle tanks, leaving 10,000 to deal with the Mexican army, and the other 20,000 M4 tanks will be sent to Europe to participate in the war against the Soviet Union. The first batch of 6,000 M4 tanks has already arrived in Europe. This was undoubtedly a fatal blow to the Soviet army.

The U.S. Army replaced the German Army as the main force attacking the Soviet Union, commanding more than 8 million League ** teams to fight against the Soviet Army, and the U.S. Army's armored tanks broke through the Soviet defense line like a flood, and in less than a month, all the positions lost by the German Army during the Battle of Stalingrad were recaptured. ╔╗

However, the U.S. military also has to face an unavoidable problem, that is, the severe cold of Stalingrad, and the U.S. military's M4 tanks also use gasoline engines. The tank's fuel and water tanks quickly froze in the bitter cold of minus 40 degrees Celsius in Stalingrad.

However, the U.S. military had studied the Battle of Moscow before coming to the Soviet battlefield and knew that the mobility of the armored forces under the cold winter was extremely poor, so the armored units of the U.S. army always kept one-third of the combat vehicles unturned until they safely passed the night.

In this way, the attack power of the US tanker unit is not affected, but there is a fatal hazard, that is, the fuel consumption is too fast. Moreover, the gasoline used by the US military has a different label than that used in Germany, and cannot be replenished in Germany. It can only be shipped from the United States. This has caused the U.S. military to attach special importance to maritime supply lines. Often, for a fleet of only a dozen tankers, the US military will send twenty or thirty light cruisers and destroyers to escort the ship.

Because the US merchant ships going to Europe were frequently attacked by the Song-class submarines of the Imperial Chinese Navy, this caused huge economic losses and casualties to the United States, especially in the strategic aspect, the inability of the European allies to receive US assistance directly affected the situation on the battlefield of the Soviet Union.

In the past, US merchant ships and US ** ships did not use active sonar systems during sailing, because if they turned on active sonar systems all the way along a long route, they would undoubtedly be tantamount to exposing their own positions. ╔╗This is because active sonar emits its own sound. Sound travels through the water, and the sound waves are reflected back when they hit an obstruction. It is listened to by the listener, based on the time and intensity of the sound traveling through the water. to determine the size and distance of the target. Since active sonar does not rely on the sound emitted by the measured target, the use of active sonar means exposing one's own position and providing convenience for enemy attacks.

In order to reduce the risk of navigation, US merchant ships and warships basically do not use active sonar on their way to Europe, and rely entirely on passive sonar to detect dangers under the sea surface.

Passive sonar doesn't make a sound, it's just a monitor that listens to movement in the water. However, if the target itself does not make a sound, or if it produces very little sound, then the passive sonar will not be able to detect the target. (The ocean noise floor is about 90db, and if the submarine noise is close to this value, then the detectability is extremely low)

The Song-class submarine of the Chinese Empire has grasped this key, the engine room of the Song-class submarine adopts a soundproof system, the stern adopts a rotating body pointed tail, and is equipped with a hull rudder and a cross-shaped tail control surface, asymmetrical 7-blade propeller and an elongated teardrop-shaped hull design, and other advanced noise reduction technologies, making the submarine's own noise very close to the noise of the ocean environment, making it difficult to identify the enemy's passive sonar.

The shell of the Song-class submarine of the Chinese Empire adopts the most advanced soundproof tile, which imitates the rubber skin of shark skin, which can reflect the detection wave emitted by the enemy's active sonar to the greatest extent, so that even if the enemy's active sonar finds an abnormal sound wave, it cannot accurately judge the true position of the submarine. ╔╗

The Germans themselves had little experience in anti-submarine before (they have always been the object of anti-submarine), so Germany's anti-submarine sonar technology is very backward, using the most primitive mechanical sonar array, and the sonar array itself has a messy noise, which makes it very difficult for the German Navy to use active sonar to find the Song-class submarines of the Chinese Empire.

However, the situation has improved dramatically in the case of the US Maritime Self-Defense Force. The U.S. Maritime Self-Defense Force was an ally of the Anglo-French Allied Countries during World War I, and the advanced anti-submarine technology and experience accumulated by the Anglo-French Allied Countries over the years have always been shared with the United States, so the anti-submarine equipment and strength of the U.S. Maritime Self-Defense Force are very powerful.

Even so, the U.S. Maritime Self-Defense Force suffered a blow during anti-submarine operations in the early days of the Arctic Ocean route, and was beaten to the ground by the Song-class submarines of the Chinese Empire. However, the U.S. Maritime Self-Defense Force soon equipped the U.S. warships with the most advanced sonar arrays, and although passive sonar still could not detect the Song-class submarines of the Chinese Empire, active sonar technology has made phased progress, and great progress has been made in the judgment of echo waves.

Despite this, the U.S. Maritime Self-Defense Force had to turn on active sonar all the way to escort U.S. merchant ships, and the entire route was filled with tick-tock sonar sounds. It was used to scare the submarines of the Chinese Empire in the hope that they would retreat.

It was by virtue of this method that the US Navy was able to relax for a month, and in this month, the United States sent four or five hundred thousand troops and several million tons of military supplies to Europe, thus relieving the urgent needs of the Allies. ╔╗

However, the Imperial Chinese Navy quickly adjusted its combat mode, and after figuring out the escort mode of the US Navy, it quickly organized targeted counterattack operations.

On January 5, 43 years of Guanghua, a reconnaissance plane of the Imperial Chinese Naval Air Force spotted a large American convoy in the North Atlantic. There are as many as 400 merchant ships, cargo ships, troop carriers, munitions ships, and oil tankers of all kinds, and there are more than 60 surface warships and submarines of various types, including five heavy cruisers and 11 light cruisers.

The command of the submarine fleet of the Imperial Chinese Navy immediately made combat deployments, and in order to support the Soviet Union in resisting the invasion of the League**, it was necessary to destroy their logistics system as much as possible, and the logistics of the American army mainly came from the sea supply lines. Therefore, attacking US troop carriers, munitions and oil tankers has become a top priority. At the same time, the Chinese imperialists wanted to further provoke the United States. An order was given to the command of the submarine fleet to allow the attack on civilian merchant ships on cruise ships.

A wolf pack of 45 Song-class submarines followed the sonar of the U.S. military and quietly set up an ambush zone.

9 a.m. With the order of the commander of the wolf pack, 45 Song-class submarines immediately launched an attack.

When the torpedo was launched, it was immediately detected by the sonar system of the American warship. At this time, the US military's sonar equipment had already gained an improvement in performance, and was able to pick up the noise of the torpedo at the first time (after suffering this torpedo for several months, it was obviously able to accurately lock the noise of its underwater launch), and quickly judge the approximate location of the opponent's submarine according to the sound source. ╔╗

U.S. warships quickly launched anti-submarine warfare, and a fierce submarine and anti-submarine warfare broke out.

The Imperial Chinese Navy did not expect that the anti-submarine capability of the US military had been greatly improved. As a result, as soon as the battle began, it was disrupted by anti-submarine torpedoes, anti-submarine rockets, and anti-submarine depth charges launched by US ships, and three Song-class submarines were wounded. For Song-class submarines. If the shell's sharkskin-like acoustic tile is destroyed by more than 3%, the noise will increase. It is easily detected by the sonar system of the American ship. Of the three damaged submarines, two were below this level of damage, and they could continue to fight, only the electric eel submarine was seriously injured, 12 percent of the sound insulation tiles were destroyed, and the noise increased to 130 decibels, which was first locked by the passive sonar of the US ship, and then the active sonar of the US ship called, and the sound scattering ability of the electric eel submarine after the shell was seriously damaged was also greatly reduced, and it was locked by the active sonar of the US ship.

At the critical moment, the Electric Eel urgently dived below 200 meters, and exited the battle sequence, leaving the battlefield as fast as possible and heading towards Iceland.

More than a dozen warships, including the USS Yorktown, chased after the submarine like cats that smelled fish, vowing to sink the submarine. But the more important thing is to expose the underwater conspiracy of the Chinese Empire, so that the Chinese Empire will fall into an extremely passive situation of public opinion.

The Atlantic Fleet of the Imperial Chinese Navy, which received the report, urgently dispatched 11 warships from Scapa Bay to conduct military exercises in the waters near Iceland in order to cover the escape of the Electric Eel.

Although the Song-class submarine was very advanced, the continuous high-speed underwater voyage caused its power consumption to be very fast, and soon had to start the diesel engine to recharge, which caused the speed of air consumption to increase, and at two o'clock in the afternoon, the electric eel submarine was forced to float 66 nautical miles north of Iceland, and the American ships that arrived quickly surrounded it.

Lieutenant Commander Vincent, captain of the Yorktown, boarded the electric eel submarine in a dinghy, and the captain of the electric eel, Lieutenant Commander Wu Gang, received him on the deck.

Looking at the huge electric eel submarine, Vincent was very surprised, stepping on the somewhat soft and slippery hull of the submarine, he could guess that this submarine used high-grade materials to make the US military's sonar undetectable. And when he saw that a large piece of scaly thing had fallen off the port side of the bow of the Electric Eel, revealing the steel armor inside, he guessed that it must have been this part of the injury that caused the submarine to be detected by the US sonar.

The evidence was conclusive, and Vincent said coldly: "Lieutenant Colonel Wu, you can't deny it this time, right?" Your navy attacked our ** ships and merchant ships, and now the people have captured the stolen goods! ”

Wu Gang snorted coldly and said sharply: "I don't know what you're talking about!" You first unreasonably surrounded my submarines, and then slandered me for attacking your warships and merchant ships, I hope you understand that your behavior has seriously violated the right of freedom of navigation on the high seas of the Imperial Chinese Navy, and you are provoking the Imperial Chinese Navy, and you will bear all the consequences! ”

Vincent was stunned for a moment, and then smiled: "I can't help you not admit it, look at your submarine, it's injured, right?" Hit by our anti-submarine bombs, right? In the words of you Chinese, this is called a mountain of ironclad evidence! ”

Wu Gang laughed a few times, laughing so hard that Vincent's hair straightened. During this period, Wu Gang quickly calculated his rhetoric in his heart, so he said: "My submarine was injured, but it was not hit by you, we are conducting exercises in the sea area ahead, my submarine was injured by the anti-submarine bomb of the red side, and it was judged to be sunk and then withdrew from the exercise, and my submarine just left the exercise area and surfaced!" ”

Vincent pointed to the damage and said, "It's just a drill, how can it cause substantial damage?" The drills are just fake shells, you rest and use this to prevaricate me! ”

"That's your country's exercise!" Wu Gang said confidently: "The reason why our Imperial Chinese Navy has been able to sit firmly on the throne of world hegemon is because of real skills, and the weapons and ammunition used in our exercises are all close to live ammunition. ”

Vincent was so angry that he gritted his teeth, and said coldly: "I don't care what excuse you use, now that you have fallen into my hands, I can't help you!" Take! ”

"You dare!"

Wu Gang shouted, and his subordinates also took out their weapons and confronted the American soldiers brought by Vincent.

The two sides are tense, and there is a great posture of triggering.

At this moment, a battle alarm suddenly sounded on the sea, and a fleet of the Imperial Chinese Navy headed towards this side.

Since the Chinese Imperial fleet had one battleship and one aircraft carrier, the overall strength was far stronger than the power in Vincent's hands.

Soon, the main guns of the battleship Hawaii of the Imperial Chinese Navy were aimed at the Yorktown, and the fighters on the aircraft carrier Fanjing Mountain took off and circled Vincennes' fleet.

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[The cruiser, which has always been very lazy, went to the book review area today, and found that some netizens complained about the sonar issue, so this chapter made a special explanation, I hope to be able to solve your doubts, as always, thank you for your support, I hope you will put forward more valuable suggestions! ] (To be continued.) If you like this work, you are welcome to come to the starting point () to vote for recommendation, monthly pass, your support, is my biggest motivation. )