PS: Thank you for the 2 monthly tickets ^_^ voted by the book friend "Fu Liang".

Although AWACS aircraft are expensive to build, even the United States can't build too many and can't cover all sea routes, but since the Americans know that the teardrop-shaped submarine is very slow in the state of the snorkel and cannot pursue, and if it does not stretch out the snorkel, it will not be able to drive far underwater, and at the same time, because the speed on the water is very tragic, the drop-shaped submarine cannot risk floating and pursuing like the old ship-type submarine, so the technical personnel of the US Navy believe that the merchant fleet as long as they do not panic after being attacked, Adjusting the course and speeding up can quickly get rid of the threat of submarines, so that although it is still impossible to completely avoid losses, it will generally sink at most one or two ships at a time (if only one submarine is encountered), which is much better than the previous loss rate.

However, the technicians also warned the merchant ships not to change their course or turn around and flee, because according to their analysis, the most likely attack method adopted by the German submarine was to ambush in the direction of the merchant fleet, so if the course did not change, in most cases it would be equivalent to hitting the muzzle of the gun, which was no different from seeking death; In addition, some experienced German captains may choose to let the merchant fleet go before attacking from behind, because human behavior and habits will subconsciously flee in the opposite direction when attacked, so it is just right to send it to the door to give it a chance to expand the victory, so it is also very dangerous for the merchant fleet to turn around and flee after being attacked.

Therefore, the technician's suggestion was to change the vertical direction of the original course, and after driving 50 kilometers, it could be ensured to get rid of the pursuit of the submarine, and then it was enough to go around in a circle and turn back to the original course. And because the snorkel is afraid of wind and waves. Therefore, it is much safer when the sea conditions are bad, and this can be taken advantage of

However, the merchant navy learned to escape only to treat the symptoms, and if you want to cure the root cause, you have to find out the German submarine and kill it, so the key is to rely on the submarine to hunt the fleet, and the captured German wire-guided torpedoes at the same time have also been analyzed and used by American technicians, which has played a great role in the completion of the submarine hunting mission.

U.S. Navy technicians found that wire-guided torpedoes, although much more likely to hit than direct-course torpedoes, had a shorter range and limited speed. At the same time, the submarine had to float to a very shallow position before launch. Moreover, the submarine could not move at all after the torpedo was fired, which provided a good opportunity for the submarine hunting fleet to destroy the German submarine.

In particular, it should be noted that once a US anti-submarine plane accidentally missed a search in the past, it was very likely that it would fly directly to a distant place to look for it. The result is naturally impossible to find. Instead, the German submarine was given a chance to escape. Now that it is known that it is impossible for German submarines to run far, the pilots will only fly their planes to search for them repeatedly in a small area, and it will be difficult for German submarines to escape.

And ordinary people should have had such an experience in their lives: "I couldn't find something before." Once you know where the specific scope is, you can often find it at a glance. And the same is true of the anti-submarine search of US aircraft and ships. Therefore, after they knew that the German submarines would not be too far away, the effectiveness of the US anti-submarine was simply rising in a straight line, so that the German Navy later only equipped each submarine with a wire-guided torpedo, which was not easily used in peacetime, and only used it desperately when it was impossible to escape

After analyzing so much information and putting forward targeted countermeasures, the technical personnel of the US Navy also compiled a new "Anti-submarine Manual" for the Allied submarine forces to study, so that countless Allied officers and men whose quality is not particularly outstanding have achieved unimaginable anti-submarine achievements, although because the survivability of drop-shaped submarines is far stronger than that of old ship-shaped submarines after all, the Allied forces in this time and space have not been able to completely bankrupt the submarine warfare of the German Navy as they have done in history. But it still succeeded in reducing its effect to a tolerable level, but that's another story

Germany's submarines could not be fully utilized, and after the new defeat of the surface fleet, they did not dare to sail to the east coast of the Americas, which was now basically completely controlled by the United States. As for Japan, not to mention that the relationship between the two countries was not close before, the Japanese have always cared only about themselves, and the main force of the Japanese Combined Fleet was still far away in New Zealand at this time, so it was impossible to rush to the rescue in time at this time.

In other words, Argentina could only deal with the US Pacific Fleet, which had increased the number of capital ships to 10 at this time, and after the US military easily captured the Malvinas Islands, which Argentina had not long "recovered", the Argentine government quickly lost the courage to continue fighting, and finally succumbed to the pressure of the Allies, announced the reorganization of the government and withdrew from the Axis camp, and the US government also "magnanimously" stated that it would not hold senior officials of the Argentine government accountable. And Argentina, a big country, couldn't hold on, and Chile, another Axis member in South America, couldn't hold on, and immediately took the initiative to declare neutrality without waiting for the US troops to arrive, and said that they could provide ports and supplies to the Allied forces

At this point, the United States has completely restored control of its own backyard, and it is stronger than before. As a result, the US military has not only freed up several hundred thousand mobile troops, but may also obtain a large amount of cannon fodder from Latin American countries in the future. And after taking full control of the Strait of Magellan, the reorganized US Pacific Fleet also opened the door to the Pacific Ocean, and the day of revenge has finally arrived

However, for the Western European continent trampled by the German army, even the United States, which now has tens of millions of troops, does not want to clash with the powerful German army too early, and pits more hopes on its ally the Soviet Union, but the Soviet Union is now in an unprecedentedly bad situation, and there is no hope of a counteroffensive at least in 1944.

While the retreat from Moscow succeeded in preserving the last remaining mobile Soviet forces and bringing out millions of civilians in and around Moscow, it left Leningrad's flank unprotected. In this case, although the mustache thought that the southern front was more important, he failed to convince the generals of the Wehrmacht, and he had always been eager to occupy Leningrad, a city of special political significance, to sell good to the international financial oligarchy, and use their influence to make peace with the West and end the war that could not be ended, so he finally agreed to concentrate all the forces that could be mobilized to besiege Leningrad, and the most tragic battle in the history of the world - the Battle of Leningrad broke out (to be continued......