A large number of construction steel bars, plus high-specification concrete, have also been quickly poured into the large pit that has been dug at the top of the mountain, and with the shape of the soldiers, one by one deep into the mountain three meters below the ground, about one meter five on the surface of the buried permanent bunkers, has been built. As long as you wait a few weeks, after the interior is completely dry, even if the 155mm howitzer hits directly, I am afraid that it will be able to withstand the one-and-a-half-meter-thick reinforced concrete, plus a two-finger-thick steel plate.

Although they are combat soldiers, they also have a little knowledge of battlefield engineering, at least this kind of permanent defensive bunker with low technical content can still be built. Especially with Liszt's sufficient supply of materials, without considering the consumption of materials, they were designed and built to the extent that they can withstand the direct fire of 203mm howitzers!

Centered on the top hill of Cave No. 5 at the base of the cave, all eight hills within two kilometers of the surrounding area have been built with this kind of bunker. In this complex mountain environment, as long as they have mastered the commanding heights, then it means that they also have the initial advantage. Like a jagged cog, the protrusions and articulation points are defensive pillboxes with heavy machine-gun firepower, not to mention the attacking mountain light infantry, what can even be done with heavy armored troops?

For this world of deformed technological development, Liszt does not have the habit of leaving a back door with good intentions, and these defensive bunkers constructed by one water are really cylindrical. In addition to the bottom of the space, there is a tunnel and a half meters deep four meters below the mountain, and you want to enter this defensive bunker. I'm afraid it's not possible.

There are four floors of defensive pillboxes, namely the firing layer area at the top and the standby layer area at the second part. The rest area of the third section, and the traffic and reserve area of the fourth section. Because there is no passage into the bunker on the back, the access of the entire bunker is completely dependent on the half-meter-deep tunnel on the fourth floor, which is also an important passage to connect with the outside world through the underground tunnel dug out.

The strength of the medium-sized excavator can easily break through the soil layer, and the width of about half a meter has been dug out at the bottom of the hill three or four meters. At the same time, large-scale sewage pipes are common in urban construction work. It has also been placed in it, and after being refilled, it has been used as a ready-made traffic tunnel.

Such a structure completely avoids the total loss of the surface. After retreating to the interior of the cavern base, the outer bunkers also fell into the hands of the enemy. After all, once you can only communicate internally, then even after the surface is completely lost, the firepower points from the bunker can still be contacted through the secret passage. Whether it's to replenish ammunition or to replenish battle-damaged soldiers. It's all pretty easy and fast, and it's absolutely safe and secure!

The numerical superiority and air superiority of the Soviets were inevitable for Liszt, and since he had already made up his mind to build such a high-standard defensive bunker to relieve the pressure on the cave base itself, it was necessary to consider in advance the consequences of once his surface was occupied.

The secret passage is just one of them, a bunker with a thickness of more than one meter. It has also been on the first and second floors, together with four shooting holes in the wall. It can meet the firing in four directions: front, rear, left and right. At the same time, in cooperation with the pillboxes on the surrounding hills, fire suppression and fire strikes are carried out to ensure that there are no dead ends in their own firing area. Even at the bottom of the hill and on the slope of those pillboxes, the unsightly stones and slopes have been filled in, ensuring that the heavy machine gun fire can cover the foot of the hill along the firing hole, and even in the woods in the distance!

Even the interior of the cave base is already undergoing intense and detailed expansion work. Those marines are also using **** and pickaxes to quickly transform the inside of the cave, not only widening and deepening the cave, but even the inner wall of the cave has begun to dig to the outside, forming a tunnel of about half a meter, and at the same time digging a space of less than two meters in the area near the surface of the hillside, just like a defensive bunker, a narrow shooting hole is also dug on the outside of the rock mass, and at the same time, with steel and concrete, all the space inside is poured into the structure. A mountain-based firing position has been formed!

This is not one, the entire cave base, as long as the area connected to the surface has been excavated such a space, and at the same time, a stable space has been built with reinforced concrete to ensure strong fire output. It is impossible for Liszt to defend the bunker alone, even if it is this cave base, it will have to bear part of the firepower output, or even stronger firepower.

The shooting holes inside the cave base are not only the M2 Browning heavy machine guns with a caliber of 12.7mm, but even the 14.5mm large-caliber heavy machine guns have appeared at several key nodes, ensuring that at the critical moment of the defensive line, it can produce powerful firepower, so that the attacking enemy troops feel the pressure and are forced to evacuate.

And Liszt in the cave base, also prepared some backward little surprises for those Soviets who would definitely appear, and there were also no surprises in this world. From the "Call of Duty" system, the Type 92 infantry gun used by the Japanese army on the battlefield of World War II has undergone a little transformation of modern technology.

The Type 92 infantry gun, which uses high-explosive shells, can cause fire coverage to the enemy from a distance of 100 meters to 3,000 meters. And whether it is a direct shot or a curved shot, it can be quickly adjusted, especially in the complex and undulating mountainous terrain of this environment, causing a lethal killing effect to any enemy who feels hidden in the anticline fortifications.

Although Liszt had never built pillboxes and permanent fortifications, Liszt had seen such strategic fortifications developed from trenches in military schools and in reality. The Europe of this world, as well as the Maginot Line of World War I, was even reactivated because of the closeness of the Soviets and Germany, but if you look closely, the Anchorage Line, which is also covered by mountains, can show the credibility of such fortifications.

Especially Liszt, who has memories of his previous life, the Battle of Songshan in Southeast Asia and the Battle of Iwo Jima in the Pacific Ocean in his previous life are all mountain fortifications that can only be gnawed down with human life. Even in the past, the United States was so powerful in military power, but in the face of Vietnam's tunnels and fortifications extending in all directions, it was still helpless, not to mention the current world with backward conventional weapons.

Everyone is busy and nervous, and they are also quietly waiting for the final moment to come. Whether they can survive the Soviet offensive or whether they sink under the Soviet offensive depends on their efforts. Although their numbers are pitiful, they may not be unable to fight because they have already occupied a geographical advantage.

What's more, the current Liszt, who still has more than 400,000 points, can still recruit marines to replenish battle losses at any time. As long as the Soviets can't defeat them with one blow, as long as they fall into a stalemate, relying on the hollowed-out cave base that almost connects the entire mountain, they may not be able to survive, and then live better! (To be continued.) )