"Comrade Commander, thank you very much for your help!" Bangs said, "But there's one more thing I want to ask you for!" "Say anything, we can help you, we will definitely help you!" Su Huizhen's brother said. "I would like to ask you to send a group of air defense units with real combat experience to help us in air defense operations! I'm very accurate, but I'm not proficient in the tactics of air defense, and I need your help! Bangs said. But this matter requires the permission of Comrade Stalin, and I can report your request to Moscow, as long as the great Comrade Stalin agrees, I have nothing to say! Su Huizhen's brother spread his hands and said. Well, then please let me know, even if it's just a few experts! Liu Hai said: "When I go back, I will also propose it like our central government!" ”

Liu Hai and Su Huizhen brought back anti-aircraft guns and a large number of other supplies from the Northeast directly to North Korea, and Liu Hai planned how to use these weapons when he was on the train! This batch of anti-aircraft guns is divided into three types, light, medium and heavy, a total of 510 anti-aircraft guns, 200,000 rounds of various shells, about the shells, Liu Hai knows that these 200,000 rounds are not enough, fortunately, before leaving, Liu Hai and Marshal Onolov said that there will be 1 million rounds of anti-aircraft shells of various calibers in the follow-up assistance, but it will take some time to prepare, and the Soviet side will try to deliver all of them within half a year. What Liu Hai is thinking about now is how to arrange these hundreds of anti-aircraft guns!

"Dear Hai, I knew that your value was immeasurable, but I never thought that you would be so valuable, five hundred anti-aircraft guns, hehe!" Su Huizhen came up and said. "What kind of money is it, when the time comes, I have to work for the big brother, at most he is a long-term worker, but the owner pays the wages first!" Bangs laughed to himself. "Look at what you said, if you are willing to go to the Soviet Union now, the Soviet Union is probably willing to take another 500 anti-aircraft guns!" Su Huizhen said. "These 500 anti-aircraft guns can only play a defensive role, and it is not enough to deal with thousands of American aircraft!" Bangs said with some worry. "That's better than nothing!" Su Huizhen said. "What I'm thinking about now is, how to get the most out of these 500 anti-aircraft guns! What about a 400-kilometer supply line! Bangs said. Don't rush, take your time! Su Huizhen said.

"I remember the last two times you were in charge of the transport line, you did a good job! Why are you so worried this time? "Su Huizhen brought a bottle of vodka!" This time is different, the last two times to put it bluntly were opportunistic, the Americans suddenly did not adapt to it, let me take advantage of the loopholes, now it is the overall planning and arrangement of the whole line, I am not particularly proficient in air defense matters, I have to prepare well! Bangs said. There is no problem, you just need to arrange it well, you have made the artillery coordination of millions of the Democratic Alliance Army at the beginning, and there are only a few hundred guns, no problem!" Hehe," Liu Hai smiled, "That's what I'm afraid of, it's cold in high places!" ”

The bangs were worried all the way, thinking and meditating, but fortunately, Su Huizhen comforted along the way, but the bangs still didn't come out at all. When Liu Hai and the others returned to the logistics headquarters of the Korean battlefield, Hong Xuezhi was already looking forward to it, and when he watched the train full of anti-aircraft guns coming, he burst into tears with excitement. "Master Liu, you're finally back, have you negotiated the agreement? How many anti-aircraft guns are there? Hong Xuezhi asked excitedly. This time there were a total of five hundred anti-aircraft guns, and this was the first batch of one hundred and twenty! Bangs said. Great, great! That's great! "Hong Xuezhi is crying and touching these anti-aircraft guns!" Comrade Liu Hai, I have already received a notice asking you to take full command of all the anti-aircraft artillery, and it is up to you whether our logistics and transportation can have a safe sky! Hong Xuezhi said excitedly. That's what worries me the most! Bangs looked at a train full of anti-aircraft guns!

"Aren't you a cannon god?" Hong Xuezhi poured a glass of water for Liu Hai: "Why are you worried like this with hundreds of cannons?" "How can you not worry?" Liu Hai sighed: "In the last two air battles to defend the transport line... "You're doing a good job!" Hong Xuezhi said. "What's good? The last two times were clever tricks, but now it is a full-line anti-air defense, and it is necessary to have a special anti-air defense strategy and special tactics, and I am not very proficient in this aspect! Bangs said, "I'm afraid that this is good, if you do it wrong, the sin will be great!" "You don't have to be so unconfident, they should all have the same thing as a cannon!" Hong Xuezhi said. "Minister Hong, can you ask the Central Committee to ask the Soviet big brother to send an air defense force to help us, even if it is only a few experts!" Bangs said. "I can apply for this matter, I believe the central government will agree, and besides, the Soviet troops are coming, we can arrange for them to protect the Yalu River or the hydropower station or something!" Hong Xuezhi said. "I've already said hello on the Soviet side, as long as our side is applying, it should be fine!" Bangs said.

In the following time, Liu Hai devoted himself to the placement of anti-aircraft guns and the arrangement of anti-aircraft operations. "On the 400-kilometer-long transportation line, there are more than a dozen important points and key points, which need to be strongly defended, and air defense is also needed along the way, especially those dangerous sections and viaducts, these 400 anti-air guns are definitely not enough in terms of quantity!" Bangs said, looking at the map. "I think we can use heavy trucks to carry out some mobile air defense points and carry out mobile defense in various needed areas, which can increase the effectiveness of anti-aircraft guns!" Su Huizhen said beside her. "In the previous air defense operations, I have found a problem, that is, we cannot make reasonable arrangements for our already insufficient anti-aircraft firepower, and if we block the channel of the enemy plane, we will not be able to attack the enemy plane, and if we attack the enemy plane, we will not be able to effectively block the channel. Bangs said. "Then what to do, there are only a few cannons!" Su Huizhen said. "I have some ideas about this problem, and I'm still sorting it out, so try my best!" Bangs said.

"Comrade Liu Hai, our Central Committee has put forward a request for air defense to the Soviet side, and the Soviet side has agreed to our request, and an air defense unit at the battalion level has reached the Yalu River, and from tomorrow they will take over the air defense task of the Yalu River Bridge!" Hong Xuezhi ran to tell Liu Hai excitedly. "Great, I'll go see it now, I'm sure I can only see it once!" Liu Hai stood up excitedly and said. On the same day, Liu Hai took the car back to the bank of the Yalu River and found the empty position of the Yalu River.

"Hello, Captain Slov!" Liu Hai met the commander of this air defense unit, Captain Slov! "Hello, Division Commander Liu, are you here to visit our air combat?" Captain Slov said. "Yes, I'm here to learn!" Bangs said. "But there are no enemy planes now!" Captain Slov said, looking at the sky. "With the frequency of sorties by the US military, it is not difficult to find opportunities!" Bangs said. Sure enough, half an hour later, five American bombers flew over in the sky, and Captain Slov's troops immediately began to shoot! However, when Liu Hai saw that the plane had not yet reached the distance of the air defense, Captain Slov ordered to shoot, and many artillery pieces turned the sky red, although they were all possible dives of the US plane, but it was too wasteful to fight like this, but the US plane did not give up, desperately looking for a gap in firepower, but at this time, the medium-caliber anti-aircraft artillery of the Soviet anti-aircraft artillery battalion was firing at the US plane! Liu Hai knew the power of large-caliber anti-aircraft artillery, these guns were not played with hits, but killed with fragments, medium-caliber anti-aircraft guns, with fragmentation coverage of more than 20 meters. Looking at the battle in front of him, Bangs seems to understand something, but it still needs to be improved!

"Captain Slov, it's a waste for you to fight like this!" Bangs couldn't help but say. "Nope! Division Commander Liu, we can only carry out an effective anti-aircraft counterattack by completely covering the enemy's attack surface, and the role of suppressing artillery lies in this, and the attack on enemy aircraft is responsible for special anti-aircraft guns, if I damage the bridge because of concentrating fire on enemy aircraft, it will be worth the loss, after all, my task is to resolutely defend the bridge, not to shoot down how many enemy planes, can you understand? Captain Slov said. I understand! Liu Hai suddenly realized that his idea of air defense was a little off track, and Captain Slov was right, the role of anti-aircraft guns on the transport line is to defend the transport line, not how many enemy planes are shot down! The bangs, who got the revelation, immediately returned to the logistics headquarters!

"Minister Hong, I already have a plan! I'm going to lay out a whole set of anti-aircraft fire on transport lines! Bangs said. Okay, good, just say what you need! Minister Hong hurriedly asked. I need to be able to deploy engineering units to build anti-aircraft fire points at various points, and at the points that need to be defended, a small number of light anti-aircraft artillery and a large number of anti-aircraft heavy machine guns form a low-altitude blockade of enemy aircraft, and then medium-caliber anti-aircraft guns are used to fire at enemy aircraft, and those heavy large-caliber guns are placed in the most important places, such as Pyongyang! It is also possible to arrange a heavy anti-aircraft gun every few tens of kilometers to surprise the Americans! As for the large number of light anti-aircraft guns, they were scattered along the railway! In addition, we will try to build the road close to the railway in the future, so that we can use artillery as much as possible! Liu Hai said his arrangement in one breath.

"Good! Just do as you say, I will immediately transfer the engineering regiment to build the fortifications, you write a specific plan, and we will do it immediately! Hong Xuezhi said. No problem, I'll write it now! Bangs said excitedly. Liu Hai said to do it, in a day and a half to make a detailed plan for the use and arrangement of all anti-aircraft artillery, and handed over to Hong Xuezhi, according to Liu Hai's arrangement, the volunteer army of the engineer unit after a lot of efforts, Zheng Yu completed Liu Hai's plan after half a month, Liu Hai's plan greatly improved the combat efficiency of air defense, and also effectively reduced the combat efficiency of the US Air Force! However, the Americans were not willing to be defeated, and under the organization of Van Vliet, the US Air Force began a harsh strangulation war against the logistics supply lines of the volunteers on the Korean battlefield!