After the successful landing of the Marines at Zhennanpu, the 5th KPA Corps, which was stationed on the defense line of the Yalu River, judged that the Japanese army would withdraw. Because even if the Marines could not capture Pyongyang, they had cut off the Japanese army's logistical supply line, and according to the ammunition consumption of the Japanese army during this period, it could also be determined that the Japanese army's ammunition was insufficient, so the attacking Japanese army could no longer continue to fight and could only retreat, and the KPA would also launch a counterattack against the Japanese army.

On the one hand, it prepared more than 300 large and small wooden boats, which could cross the strength of two regiments at one time; on the other hand, it prepared a large number of wooden planks, ropes, and other equipment for building pontoon bridges, and at the same time, it also transferred all the accessories of two sets of steel structure assembled bridges.

After the Marines attacked Pyongyang, the 5th Army also realized that the time was ripe for a counteroffensive, and first launched an attack on the beachhead established by the Japanese army on the west bank of the Yalu River.

In fact, the beachhead established by the Japanese army on the west bank of the Yalu River was deliberately ceded by the People's Army, with the aim of attracting the Japanese army to continuously invest manpower and material resources in order to hold this beachhead and consume the Japanese army. Although the positions of the People's Army are tightly guarded, after all, the number of people is too small, if the Japanese army launches a multi-point attack on the whole front, or even to avoid a new front, the People's Army will inevitably take care of one or the other, so let the Japanese army establish one or two beachheads, so that the Japanese army feels that there is hope for breaking through the defense line of the People's Army, in order to expand the beachhead and launch an attack based on the beachhead, so the Japanese army continues to invest troops in the beachhead, and there is no need to look at other directions, and the People's Army can also concentrate on the target to deal with the Japanese attack.

In fact, as long as the KPA wants to, it can break through the Japanese beachhead at any time, and now is the time. Two KPA 200-mm self-propelled guns immediately locked onto the Japanese beachhead and launched an artillery bombardment.

The Japanese beachhead was mainly a simple fortification made of sandbags, and a small number of trenches were dug up. Of course, the machine gun fire has a good defense, and it also has a certain defense against small and medium-caliber artillery, but it has little defense against large-caliber artillery fire, and a 200-millimeter shell falls into the position and explodes, which is enough to blow up the parapet wall made of sandbags, and the People's Army also concentrated nearly 100 artillery pieces to carry out covering artillery bombardment of the Japanese beachhead, and in less than 10 minutes, nearly 1,000 shells were fired at this area of only about half a square kilometer. By the time the shelling was over, almost every inch of the Japanese beachhead had been turned over, and all the sandbag walls had been destroyed.

When the KPA attacked, there was no resistance from the Japanese army, and when the KPA broke through the position, it was found that the position was full of corpses, and most of them were mutilated, and only a few were still breathing, moaning in pain.

Easily destroying the Japanese beachhead, the KPA immediately launched a river-crossing attack, this time all the artillery opened fire together, and launched a fierce artillery bombardment of the Japanese positions on the east bank of the Yalu River, because the Japanese positions were not on the bank of the Jialu River, but 3-5 kilometers from the shore, so it was just right for the KPA to carry out artillery and foot coordination, and the firepower was extended. So the fighters of the two regiments in charge of the assault put the wooden boats on a large flatbed cart mounted on wheels and pushed them towards the river.

When they reached the river, the soldiers lifted the wooden boat from the flatbed truck, pushed it into the river, and then jumped on the wooden boat and rowed to the opposite bank. In a short time, more than 300 wooden boats were all pushed into the river, and some of the fast wooden boats were almost in the middle of the river. And the workers also rushed to the riverside and began to erect pontoon bridges and assemble steel bridges.

When the People's Army crossed the river and built a bridge, the Japanese and South Korean troops on the other side basically did not stop it, and they did not even fire a few shots, which also made the People's Army a little surprised, although the main position of the Japanese and South Korean troops was 3 kilometers away, but there were their outposts by the river, and although the People's Army estimated that the ammunition of the Japanese and South Korean troops was about the same, it would not be left at all.

Of course, the KPA will not know that the Japanese and South Korean troops in the current position really have no ammunition at all, because all the ammunition has been given to the five elite Japanese divisions, so naturally it is impossible to prevent the KPA from crossing the river.

Of course, accidents are accidents, but the river still has to continue to cross, and the Yalu River is not very wide, and it is now the November season, entering the dry season, so soon there are ships to the east bank of the Yalu River, and the soldiers have jumped off the wooden boats, boarded the river bank, and then immediately set up a beachhead on the shore.

In fact, at this time, the Japanese and South Korean armies had no resistance at all, so the KPA did not need to establish any beachhead on the east bank of the Yalu River.

However, the KPA did not know that the Japanese and ROK armies really had no ammunition at all, and always thought that even if the Japanese and ROK armies were short of ammunition, there would still be a little bit of it, and they could not be careless, not to mention that there were about 250,000 in total in Japan and South Korea, and even if they retreated some, there would always be more than 200,000, and it was indeed a bit risky for the KPA to launch an attack on the positions of the Japanese and ROK troops with only two regiments crossing the river. Therefore, it is understandable that the KPA should choose a prudent tactic at this time, first establish a good beachhead to ensure that more KPA troops cross the Yalu River, or wait until the pontoon bridge is built before launching an attack on the positions of the Japanese and ROK troops.

However, in this way, the KPA was delayed for a lot of time, and Kodama Gentaro had already given the Japanese army an order to retreat, so some Japanese troops took advantage of this time to withdraw from their positions and retreat south.

After the first batch of KPA troops landed, the wooden boats transporting the soldiers immediately turned back, and the second group of KPA boarded the boats to cross the river, until the third group of KPA landed on the east bank of the Yalu River, not only did they not encounter resistance from the Japanese and South Korean troops, but even the beachhead was not attacked by the Japanese and South Korean troops, and at this time, most of the two pontoon bridges under construction had been completed, and the rest of the work could be completed within one hour.

However, although the Japanese and ROK troops did not launch an attack on the KPA, they also sent some reconnaissance personnel to understand the progress of the KPA, and after the KPA had established its beachhead, it also sent scouts to reconnoiter the positions and movements of the Japanese and ROK troops.

Scouts from both sides will inevitably meet, and skirmishes will ensu. Although the Japanese scouts may have a few bullets, they cannot be compared with the KPA scouts, so the engagement between the two sides is basically one-sided, and the KPA not only killed some Japanese scouts, but also captured a few people. After interrogating the prisoners, the KPA learned that the Japanese and South Korean troops did not even have any ammunition.

The scouts immediately reported it to the regimental headquarters, and the regimental headquarters did not dare to draw conclusions about such a major incident, so it was reported to the command of the 5th Army. After all, the Japanese and South Korean armies do not have many ammunition, so it is also a suitable choice to concentrate the remaining ammunition and ensure the combat effectiveness of several elite troops, after all, from the beginning of the People's Army to launch the crossing of the river to the present, the Japanese and South Korean armies have indeed not reacted at all, and this can only be explained if there is indeed no ammunition.

At this time, the KPA had already crossed six regiments of troops, and there were quite a few of them, and although the heavy weapons had not yet crossed the river, each regiment was also equipped with a lot of mortars and machine guns, and the firepower was not bad, so the command of the 5th Army decided to leave two regiments to continue to defend the beachhead, and the other four regiments launched attacks on the positions of the Japanese and South Korean troops from four directions.

Originally, Kodama Gentaro had ordered before leaving, ordering the Japanese army to immediately retreat from the position, leaving the South Korean army to guard the position as cannon fodder to cover the Japanese retreat, but in addition to the 5 elite divisions, the Japanese army still has about 100,000 troops, so many troops want to retreat from the position, and it is not possible to complete it in a short time, although due to the caution of the People's Army, the Japanese army has been given a few hours to retreat, but the withdrawn army is less than 20,000 people, and the rest are all left in the position, and at this time the People's Army launched an attack on the position of the Japanese and South Korean troops, so they can not withdraw if they want to, and can only meet the People's Army together with the South Korean army。

As a result of this attack, the four regiments easily captured their own attack positions, basically did not encounter any resistance, and captured a large number of prisoners, and there were almost no casualties themselves, not that the Japanese and Korean troops did not want to resist, but that they could not resist, although Kodama Gentaro ordered the Japanese and Korean troops who remained behind to wait for the KPA to enter the position and engage in a white-knuckle battle with the KPA after the KPA entered the position.

But the People's Army will not stupidly wait for the Japanese and South Korean soldiers to rush to the front, after several rounds of continuous shooting, the Japanese and South Korean army's charge has also been beaten by most of it, and the rest will not be able to hold on and scatter in a hurry, and even if the two sides start a white-knuckle battle, the Japanese and South Korean soldiers are not opponents, because the Japanese and South Korean soldiers who go to war are just selected from ordinary people, and neither training nor combat experience can be compared with the People's Army, not to mention that now the People's Army has experienced several major battles, and the ability of white-knuckle warfare has long been overdue, even if it fights with the elite of the Japanese army, it will not fall behind, and it is naturally effortless to defeat this rabble。

And the most important thing is the result of this wave of attacks, and it is finally determined that the Japanese and South Korean troops are really out of ammunition. Moreover, at this time, the two pontoon bridges had been completed, and the speed of the KPA crossing the river was greatly increased, so the KPA completely let go and launched a full-scale attack on the positions of the Japanese and South Korean troops.