Fortunately, the frequency of Chinese large-caliber artillery is very slow, and only a large-caliber shell will explode violently near the road every five minutes or so, which gives the chaotic Soviet troops on this section of the road a chance to escape.

Although a single shell exploded, all Soviet troops within a radius of more than 20 meters would fly into the sky, and even tanks weighing more than ten tons would be thrown far away, but because the frequency of shelling was too low, the casualties caused by the shelling to the Soviet troops were not large. On the contrary, the panicked Soviet troops ran over and crowded and stampeded their own vehicles, which caused great casualties to the Soviet troops.

It wasn't until twenty minutes later that the Soviets left the stretch of the road where hundreds of bodies lay and a dozen trucks, tanks, and carts that had been turned over to burn.

This shelling, far beyond the range of ordinary artillery, was undoubtedly the masterpiece of the 240-mm naval gun located in the fortress on the top of the hill. It's just a pity that the terrain in this area is complicated, even in the main fort on the top of the mountain, only a small part of the road can be observed, and the best place for shelling is only this section of less than a kilometer, otherwise it will cause more casualties to the Soviet army.

However, due to the huge power of the naval guns, the psychological pressure on the Soviet troops was very great, and from then on, the Soviet troops did not dare to pass through this section of the road during the day.

In fact, the Soviet air force had long regarded the main fort of the fortress group located on the top of the mountain as a key bombing target, but this main fort was built too strongly, and hundreds of aerial bombs were used for more than ten days of bombing, which only made it lose a layer of skin. This made the Soviets regret not bringing large-caliber siege mortars.

In the ensuing tentative assault on the fortress group, the Soviets soon discovered the weakness of the giant cannon, which was that it had dead ends. The Soviets quickly adjusted the direction of the attack and launched a fierce attack on the fortress group.

The Soviets suffered heavy casualties in the first day of the attack, losing more than a thousand men and being blocked out of the first tunnel fortification circle.

The main reason for such heavy casualties for the Soviet army was that there were almost no open trench fortifications in this fortress group, and all the soldiers of Gao Zongbao's 39th Army were hiding in underground sheltered fortifications, and the casualties caused by Soviet artillery fire were very small.

Unless a heavy artillery or aerial bomb repeatedly hits the top of the tunnel, a section of the tunnel can be opened. The Soviets attempting to break into the blown up tunnel would be killed by cross-fire from both the nearby tunnel and the fire support point behind the first tunnel, making it difficult to get close to the tunnel. The defenders will soon be back through the underground passage and recovering their ground positions in the blasted tunnels.

In particular, the artillery and mortars of the 39th Army, which were hidden in the mountain cols, would suddenly appear at any time and launch a fierce bombardment on the attacking Soviet troops, and the dense artillery fire would cause the Soviet troops to lose one or two hundred men each time.

Fortunately, there were groups of Soviet planes circling in the air, and as soon as the opponent's artillery positions were discovered, dozens of planes would dive and strafe and bomb, and by the afternoon, in addition to the occasional mortars, a few shots would come out, and the Soviet troops had completely suppressed the artillery fire of the fortress group.

On this day, the Soviet tanks participating in the offensive also lost more than a dozen units, all of which were hit by the battle defense artillery in the fortifications.

The next day, the Soviets changed their tactics, no longer bombing the fortifications indiscriminately, but concentrating hundreds of heavy artillery pieces to bombard the anti-artillery fortifications and fire support points behind the tunnels that appeared in the battle on the first day. Then, the infantry was charged at several points under the cover of the tank, and after the tank approached the tunnel fortifications, the Soviet army tank guns and 37mm anti-aircraft guns fired directly at the tunnel firing holes.

Although the Soviets found that the 39th Army's anti-aircraft guns not only had a long range but were also powerful, and the Soviets suffered great losses in the counter-firing, the Soviets had a large number of tanks and anti-aircraft guns, and after losing more than a dozen anti-aircraft guns and a few tanks, they still rushed into the pit by the blown up tunnel fortifications and successfully occupied the tunnel fortifications several hundred meters long. The casualties of the 39th Army, from this time on, also began to rise rapidly. …,

However, that night, the 39th Army launched a fierce night attack on the tunnel occupied by the Soviet troops through the underground passage, and the artillery of the 39th Army, which had almost disappeared during the day, was also resurrected and launched a fierce interception fire on the Soviet reinforcements.

The firing range of the various sections around the fortress had been measured long ago, and the artillery of the 39th Army, even if it was not calibrated, would be very accurate in firing at night, keeping the Soviet reinforcements firmly out of the artillery blockade area.

Although the Soviet artillery was larger in caliber and more numerous, it could not find the artillery positions of the 39th Army in the col at night, and could only return fire according to the approximate position indicated by the air force during the day. However, the 39th Army's mountain artillery and mortar preset positions were large, and the artillery bombardment at night was not on the positions exposed during the day, and the Soviet artillery bombardment did not pose any threat to them.

After a night of fighting, the positions occupied by the Soviet troops during the day were recaptured by the 39th Army at night.

After dawn, the embarrassed and angry Soviet troops, with the cooperation of aircraft and heavy artillery, once again launched a fierce attack on the positions of the 39th Army, not only regaining the positions lost during the night, but also occupying a larger section of the position. Then, during the night, the two sides again fought for position. However, although the Soviet troops, who had been prepared for a long time, lost most of the positions they had occupied during the day, they still managed to hold part of the fortifications that had been blown up and occupied the next night.

In such repeated battles for positions, casualties on both sides were heavy.

Although the 39th Army relied on tunnel fortifications to defend, the Soviet artillery fire was too fierce, with tanks to help the battle, and there were hundreds of planes bombing and strafing in the sky, as soon as the artillery positions of the 39th Army were discovered, they would swoop down in droves. Although the artillery positions of the 39th Army were well protected and hidden in strong anti-artillery holes, if they wanted to shell the Soviet attacking troops and provide artillery support for their own side, they had to push the artillery out of the holes, which became the target of Soviet aircraft.

Although the Fourth Route Army paid great attention to air defense, and the 39th Army was equipped with a lot of anti-aircraft machine guns, and even shot down a Soviet plane, the artillery and anti-aircraft fire losses were very large, and now it can only support the infantry at night.

According to the battle report reported by Gao Zongbao, in the past week since the Soviet army launched an attack on the No. 1 fortress group, the Soviet army has lost 24 tanks, shot down a Soviet plane, and killed and wounded more than 5,000 Soviet troops. The 39th Army suffered 4,872 casualties and more than half of its artillery.

"The Thirty-ninth Army suffered nearly 5,000 casualties?"

As a defender with a well-established position, the battle loss ratio with the attacker was close to 1:1, which not only surprised Song Zhewu, but even made him feel a little puzzled......

There are more things to do these days, so I will send a small chapter today, and I will start to send them in a row tomorrow.

Thanks to the "chopin8586" book friends for their tips ......,