The so-called movement defense operation means that the defense is not static but dynamic. Our army not only stubbornly resisted the enemy by relying on favorable terrain and fortifications, but also launched counter-attacks and counter-assaults in a timely manner. Under the circumstance that the enemy has air supremacy and has a great superiority in ground firepower and assault power, it is impossible to resist the enemy's attack by adopting passive and simple defensive actions, and only by combining holding a position with counterattack actions can we enhance the flexibility and vitality of the defensive line.

On February 19, the arrogance of the landing from Inchon after the battle of Topyeong-ri and the panic after being beaten by the volunteers in the early days of the DPRK completely restored the so-called "honor" and "confidence". The "United **" first launched an offensive on the eastern front, and under the continuous resistance of the Chinese and North Korean armies, the progress was slow, and by March 6, it advanced to the line of Yangpyeong, Hoengseong, and Hasonghama to Gangneung on the east coast, leveling the eastern and western fronts.

On March 7, the "United **" launched a large-scale offensive on the Western Front with a total of 14 divisions, 3 brigades, and 2 regiments of 5 armies. Based on the experience of defensive operations on the south bank of the Han River, the Chinese and DPRK armies adopted the tactical principle of emphasizing the allocation of troops in the front and emphasizing the rear, and combining firepower with the emphasis in the front and light on the rear, and implemented a wide frontal and large-depth movement defense. From the 10th, according to the predetermined plan, the armies of the first echelon will be gradually transferred to the north, and the second echelon will continue to carry out mobile defense.

On March 14, the 1st KPA Corps voluntarily abandoned Seoul. On the same day, our 3rd and 19th Corps were assembled in the Andong and Fengyang areas, ready to enter the DPRK immediately. The main forces of the 9th Corps were also preparing to advance to the Jinhua and Pyongkang areas.

On March 15, the "United **" entered and occupied Seoul.

After March 16, the "United **" continued to adopt the tactics of "bringing the main force closer" and "equal development" and "magnetic tactics" to the north, and by the 23rd, it occupied the line of Goyang, Uijeong, Gapyeong, Chuncheon, Warye-ri, and Zhumunjin. The Chinese and DPRK armies have adopted the deployment of key fortifications, echelon deployment, holding key points, and controlling the area with points, and have relied on various means such as blocking and counterattacking, ambushing, and assault to inflict a large number of casualties on the enemy by relying on each position to resist one by one.

The 354th Regiment of the 118th Division of the 40th Army was ordered to hold its position in the Hongchuan River area.

In the trench of the second company and one squad of the third battalion of the 354th Regiment, Shi Chen took a captured American-made M1919A6 light machine qiang, and frantically vented his tongue of fire to the enemy in the tunnel. The bullet casings had already formed a hill around Shi Chen, and he stared at the enemy who had climbed halfway up the mountain with his resolute red eyes, and pulled the trigger. The sound of bao zha was constantly ringing, deafening, and the sound of artillery hit the position and set off a wave of heat, blowing away the dust next to Shi Chen. After a while, the sound of someone shouting could be faintly heard in the sound of artillery fire.

"Squad leader! Monitor! The enemy is coming up soon. Get down! Get down! It was Zhigang, he hurriedly grabbed Shi Chen, and did everything possible to shout his voice to the maximum: "Squad leader, company commander, let's withdraw first!" ”

Shi Chen was already red-eyed, but he still held on to his hand and opened fire on the enemy.

"Squad leader, squad leader! Listen to me, listen to me! ”

Shi Chen finally heard what Zhigang said, and shouted loudly: "What's wrong? ”

"The company commander told us to withdraw, support the 256 heights, and continue to fight!"

"Okay, the whole class! Remove! Shi Chen shouted, but the sound of artillery fire and bao zha was so loud that many soldiers couldn't hear it, so Shi Chen patted his shoulders one by one and made a retreat gesture. The people in the machine qiang class knew what the squad leader meant.

Shi Chen and the soldiers of the Jiqiang squad all withdrew from the trenches. Only then did he realize that the hill of his position had been lowered by four or five meters by enemy artillery fire.

"Quick! 256 Heights! Fast! Shi Chen shouted as he ran.

Heights 256 is actually the direction of the position of the third platoon. Shi Chen froze after running to the three-row position, and only three people were left in the entire three-row who were still fighting!

"Xiao Lin, Xiao Zhang......" Shi Chen looked at the dead corpses of the volunteers in the position and said, many people he knew before have now died heroically! But there is no room for a moment of nostalgia on the battlefield, Shi Chen put Qiang at the firing port and immediately went into battle! When the other soldiers in the squad saw the corpses of their comrades in the third platoon, they were also excited and immediately entered the battle.

The enemy was about to attack, and the warriors all picked up shou liu dan and threw it into the crowd of enemies.

"Boom! Boom! Bang ......" bao zha sound sounded one after another.

The bullets of the M1919A6 light machine Qiang machine Qiang were all gone, so Shi Chen picked up the weapons used by his fallen comrades and continued to fight......

In this way, the volunteers fought and withdrew, exchanging space for time.

By the end of March and the beginning of April, the Chinese and North Korean troops moved to the vicinity north of the "38th Parallel" on all fronts, and the "United **" crossed the "38th Parallel" again.

On April 15, the 3rd and 19th Corps of the Chinese People's Volunteers had entered the DPRK and completed their assembly in the Yichuan, Cheorwon, and Pyongkang areas, as well as the Nanchuandian, Shibianli, and Tushan areas, and the 9th Corps, which had been resting in the Wonsan area, also completed the assembly in the Pingkang, Xipu, and Huaiyang areas. A new offensive is about to be launched.

The "United **" found that the follow-up corps of the Volunteer Army had arrived, and the continuous combat units had suffered serious damage, so they basically stopped the offensive in other areas, except for continuing the offensive in the Cheorwon and Jinhua areas.

On April 21, the "United **" was stopped on the front line of Kaesong, Changtuan, Gaolangpuri, Munhye-ri, Hwacheon, Yangkou, Wontong-ri, and Gongcheng, and the fourth battle ended.

In the four campaigns of movement defense, the 40 th Army organized a 42-day movement defense near the Hongcheon River and the "38th Parallel," withstood the attacks of the 1st US Army Division, the 1st Cavalry Division, the 24th Division, the 25th Division, the British 27th Brigade, and the 6th Division of the South Korean Army in 190 battles, creating favorable fighters for the launch of the Fifth Campaign.

The fourth campaign was carried out by the Volunteer Army in the most difficult supply situation, called the period of "green and yellow", in this case, in the face of the fierce attack launched by the "United **" to the north, the Volunteer Army adopted a defensive approach to block the enemy's attack. With 87 days and 78,000 casualties, the "United **" advanced only more than 100 kilometers. Only then did they capture the area captured by the Chinese People's Volunteers in eight days in the third campaign, and the Chinese and North Korean troops retained their strength and withdrew to the north of the 38th parallel.

After the end of the fourth campaign, the Volunteer Army Command received information. The United States has already increased its troops from the DPRK and two divisions have already been transported to Japan, and three newly formed divisions of the South Korean Army are being organized and trained in Japan. There are all kinds of indications that the US military may repeat the second Inchon landing. And this is exactly what Commander Peng has been worried about. So he began to think about a massive counterattack on the enemy! Baidu takes a look at the latest chapter of "Men's World Masterpiece Literature" to read for free for the first time.