"Project North Light"
After our army conquered Lao Shan, the Vietnamese army was not reconciled to its defeat. The 2nd North Vietnam Military Region ordered the front-line troops to retake Lao Son at all costs. Under this pressure, after a short period of preparation, the 313th Division of the Vietnamese Army, with the strength of an infantry regiment and with the help of the heavy fog in the sky, attempted to sneak attack the positions of our main peak, but was severely damaged by our troops and retreated in disarray.
At 2:45 a.m. on 9 May, the 7th Battalion of the 818th Regiment of the 314th Division and the 1st Company of the Special Combat Regiment attacked the 1072nd Heights and No. 75 and No. 76 positions guarded by the 4th Company of the 120th Regiment of the enemy, relying on dense fog and dark cover of night. Our artillery fire immediately launched a surprise attack on the enemy and routed him.
After adjustment, the Vietnamese army attacked with a small force and was repelled by our 2nd squad with grenades.
Then the enemy's 1st company carried out a strong attack with the support of artillery fire and anti-aircraft machine guns, and the deputy commander of the 4th company rushed to the 1st platoon position to direct the battle despite artillery fire. Bazooka players Wang Zhanyou and Chen Chuang fired three rockets at close range of the enemy group, disrupting the enemy's battle formation, and then the enemy was repulsed under my fierce counterattack.
The enemy was unwilling to be defeated, and attacked again with two companies, and the company commander promptly called for artillery fire to suppress it. 4 consecutive battles At 4:05, they defeated 8 enemy attacks in a row, killed 44 enemies, and firmly held their positions.
At about 3 o'clock in the morning of 11 June, the 14th Regiment of the enemy's 313th Division dispatched two battalions, with the cooperation of the 1st Special Forces Regiment of the 821st Special Forces, to secretly approach the positions of the 1st Battalion and 2nd Company of the 119th Regiment in the direction of our Laoshan near Nala, and advanced to the southwest side of Heights 146 to strike mines. Liu Kailiang, commander of the 2nd Company, immediately ordered all positions to prepare for battle, ordered 60 mortars to fire at the front of the minefield, and reported to the battalion headquarters the enemy's attack.
At this time, more than 40 enemies continued to move upward, and more than 10 people in front had already touched the front of the position of the 3rd squad and were repelled by the fighters of the 3rd squad with grenades. The enemy then relied on Heights No. 142 and used two antiaircraft machine guns to cover and once again attacked the 3rd squad. The other two platoons of the enemy approached Heights No. 146 along the north side of Heights 411.
The 2nd Company waited for the enemy to enter 30 meters before the first trench and suddenly opened fire to push him back. The enemy retreated to the south side of Heights No. 146 and occupied favorable terrain to confront us.
At 3:35 a.m., the enemy's in-depth artillery and forward-facing direct-aim artillery fiercely attacked our positions Nos. 145 and 146. The infantry took the opportunity to rush to the position of the 2nd company and 3rd squad. The 3rd squad responded to the battle with the support of friendly neighbors, and repelled the enemy 3 counterattacks. The enemy retreated to the southwest side of Position No. 146, and after adjustment, launched another attack, but was pushed back to its original position by us.
Fifteen minutes later, the enemy charged again. At this time, the command post of the 2nd Company was hit by the enemy's recoilless guns and bazookas, the company commander was killed, the walkie-talkie crew was wounded, and the communication between the company and the battalion was cut off. The 3rd squad was forced to withdraw to the top of Heights 146. After the enemy broke through the position of the 3rd squad, they captured the 145th high ground along the valley on the west side of the 146th height.
The platoon commander of the 2nd artillery platoon, the acting company commander, continued to direct the battle. Under the order of the command post of the 119th Regiment, the 3rd Company and 1st Platoon cooperated with the 2nd Company to carry out a recoil and recapture the lost position of the 3rd Squad.
Chen Keyuan, the commander of the 2nd platoon of the 1st Company, was ordered to lead the 4th and 5th squads out of the No. 145 high ground, and the platoon commander died in the enemy. Guo Huazhong, the leader of the 5th squad, Zheng Wenshu, the leader of the 4th squad, and Wang Xingrun, the deputy leader of the 5th squad, formed a surprise group and led the two squads to continue to engage the enemy.
The reconnaissance detachment of the 40th Division, which had come to Heights 146 to carry out the task of capturing prisoners, took the initiative to cooperate with the 2nd Platoon to take advantage of the enemy's confusion to carry out a counterattack, and recaptured Heights 145, killing 4 enemies and capturing 1 enemy.
At 8 o'clock, the deputy commander of the 1st Battalion led the 3rd Company, supported by our artillery fire and the fire of the No. 146 heights, to fight fiercely for two hours and recapture all the lost positions. However, almost all of the 2 companies defending the position were killed, and the 1 company that was reinforced later also suffered heavy casualties. The enemy retreated to the front line of heights 411 and 251. The 119th Battalion of the 1st Regiment stepped up efforts to replenish food and ammunition and repair fortifications.
Seeing that the attacks had been frustrated one after another, Pei Ni, deputy commander of the 313th Division of the Vietnamese Army, hurriedly ordered the commander of the 14th Regiment to go to the front line to command.
At 15:15 on June 11, under the guidance of the 1st Battalion of the 821st Special Forces, the 1st Battalion of the enemy moved along the west side of the Qingshui River Suspension Bridge to the 227th Heights, and was discovered by our 1st Battalion. The 119th Regiment immediately organized 100 mortar artillery to carry out artillery fire to block it, killing and wounding more than 20 enemies.
At the same time, the enemy prepared artillery fire at positions No. 150 and 151 in the direction of Inara and covered the deployment of one reinforced company and special detachment of the 14th Regiment. When our artillery waited for the enemy to reach the front line and the minefield was ready to open up a passage, it carried out artillery fire to block it, and the shells accurately fell into the enemy group, causing the enemy to cry wolf.
Under the leadership of acting platoon commander Feng Guangguang and squad leader Xiong Dingren, our 1st Company, 3rd Platoon, and 8th Squad, who were guarding Heights 169, fought tenaciously. Heavy machine gunner Ran Guiming pulled out the machine gun from the collapsed fortifications and fired a long shot to blow up the enemy's rocket opener, causing chaos among the enemy. Soldier Shi Zhuhai used a rocket to destroy 1 enemy heavy machine gun.
Twenty minutes later, the enemy attacked again on heights 150, 151, and 169, and our 1st Company, relying on favorable terrain and with artillery support, used grenades and submachine guns to push the enemy back.
■ Blocking the enemy's attack, Zhai solid position.
At 20:40, about one company of the enemy's 14th Regiment moved from Qingshui to Heights 146, but was stopped by the fire of our 119th Regiment's artillery group. From 21 o'clock onwards, at intervals of half an hour, the enemy continued to attack the No. 146 heights defended by our 2nd and 3rd companies with the strength of two companies, but each time they could not get close to the position, they were covered by our artillery fire and were crushed.
At 21:35, the enemy suffered heavy casualties and the attack was hopeless, so he took advantage of the darkness to withdraw to the area south of the Qingshui River.
On 19 June 1984, the Second Military Region of North Vietnam, with the strength of two infantry regiments and under the cover of artillery fire, launched a large-scale attack on our Songmaoling defensive position, in an attempt to open a gap on the eastern front of the first line of defense of our Lao Mountain, and then launched an attack on the main peak of Lao Son along the national border of Song Mao Ling. In the end, under the stubborn resistance of our army, the Vietnamese army's offensive suffered another crushing defeat.
After the Lao Son and Bali River Dongshan areas were successively defeated by our troops, the gateway to the Qingshui area was opened, and the vast area northwest of the Ha Giang was directly under the control of our army, and the Vietnamese army's several tentative attacks at the regimental scale failed again, and the Vietnamese army's high-ranking commanders were very frightened by this.
On 19 June, Le Trong Xun, chief of the General Staff, Le Ngoc Hian, deputy chief of the General Staff, Vu Li, commander of the Second Military Region, and other senior commanders of the Vietnamese army held the second "Beiguang Conference," adopted the Second Military Region's determination to fight, and worked out a campaign plan for the "MB-84" to regain positions point by point together with Soviet military advisers, and ordered the front-line troops to recapture Lao Son at all costs. Since the combat meeting was held in a small mountain village called Beiguang in Hekou Province, Viet Nam, it was called the "Beiguang Plan."
The Vietnamese army immediately set up an artillery command post for the front command of the Second Military Region, supplemented the 313th Division, and transferred the headquarters of the 356th Division, the main force of the 153rd Regiment, the 149th Regiment, the 150th Artillery Regiment, the 821st Special Regiment, the 1st and 3rd Battalions of the 168th Artillery Brigade, and the 2nd Battalion of the 368th Artillery Brigade.
The 174th Regiment of the 316th Division, the 141st Regiment of the 312th Division, the 66th Regiment of the 10th Division, one tube of the 198th Special Service Regiment of the First Military Region, one battalion of the 312th Division of Artillery, and two battalions of the 10th Division of Artillery were also transferred to the Hajiang area.
The total strength of the army reached 10 infantry regiments, 14 artillery battalions, and 2 special service regiments, totaling more than 40,000 people. There are 8 regiments in the front-line combat area, with a total of more than 18,000 troops.
The Vietnamese army immediately replenished a large amount of combat materials, dispatched one engineer brigade and two companies to rush to repair the forward roads, and stepped up the construction of the command system fortifications. At the same time, frequent reconnaissance was carried out against us, and signs of large-scale attacks became increasingly obvious.
At the same time, it is aimed at "6 · 11. "In the course of the battle, we summed up our army's operational characteristics, summed up experience and lessons, revised and adjusted our deployments, studied new means of warfare, and conducted repeated training in a vain attempt to break through our defense line and regain lost ground in one fell swoop in the second phase of offensive operations.
It is said that at that time, our intelligence officers paid a high price to buy back the name of such a plan from intelligence traffickers, but they did not know the specific contents.
Subsequently, although our intelligence department used all reconnaissance methods, the Vietnamese army did a very good job of keeping secrets, and until the end of June, our side did not make any progress in the reconnaissance of this intelligence. Later, it was not until the end of the battle that our troops learned the details of the so-called "Bei Kuang Plan" from the mouth of the captured Vietnamese battalion commander.
From July 1, 1984, all radio stations owned by the Vietnamese army were discontinued; The forward troops cease any provocative actions against our troops; The artillery no longer fired shells at our defensive positions and in depth. The two warring sides were in a state of confrontation for a while, and the entire Laoshan battlefield was surprisingly calm.
In the face of this extremely abnormal situation, although our army did not have any valuable intelligence to rely on at that time, a consensus was formed among commanders at all levels and officers and men of front-line defense units.
In accordance with the instructions of the Military Region, the 14th Army will step up reconnaissance and analysis of the enemy's situation after 20 May, step up efforts to improve the defensive operation plan, and organize on-the-spot coordination. Command organs at all levels have repeatedly held meetings to study and analyze the possible attempts of the Vietnamese army. All units are required to seize the current favorable opportunity to strengthen and construct fortifications, set up various obstacles, and store a large amount of ammunition of all kinds. At the same time, he ordered the engineers, artillery, communications, and other arms of the armed forces and logistics detachments to complete all kinds of support needed for a big and vicious war within five days.
In the days that followed, our army's engineering units used rocket-laying mine-laying vehicles to throw more than 300,000 large and small mines at the front of our defensive positions, forming a minefield 7 kilometers long from east to west and 500 meters wide in depth.
Our artillery units actively liaise with relevant local departments, requisition nearly 800 local vehicles, and work day and night to transport a large number of artillery shells from ammunition depots in the interior to each artillery position. According to the relevant regulations, the ammunition of each gun is generally about 0.75 bases, and the maximum amount must not exceed 1.5 bases. As a result of this preparation, the ammunition of each gun of our army has reached more than three bases.
At the same time, an advanced artillery radar monitoring system is used, so that as soon as the Vietnamese army's large-caliber artillery shells are fired, it only takes a few seconds for the calculator to accurately plot the location of the Vietnamese army's artillery positions and the types of guns, which will play a major role in destroying the Vietnamese army's artillery positions.
Our communications corps has distributed advanced single-sideband radios and synchronous frequency-modulated bilateral band radios that have been airlifted from Beijing to ensure unimpeded communications in the main defensive directions.
As of June 10, the comparison of enemy forces with us is:
I have 5 infantry regiments and the enemy has 8 regiments, and the ratio between us and the enemy is 1:1.7;
We have 12 battalions of artillery above the division level, and 13 battalions of the enemy, and the ratio of our enemy to the enemy is 1: 1.07.
In short, the Laoshan Theater was already ready for arrows and spears in hand, and when he waited for an order, sharp arrows pierced his heart and captured Canglong.
At 23:50 on 11 July 1984, a radio signal was emitted from the front radio station of the 2nd Military Region of North Vietnam, which was under the close supervision of our electronic listening unit. Deciphered by a calculator, it reads: "Readiness of the Ministries".
After learning of this information, the command organ of our army immediately convened an emergency operational meeting to study and analyze it, and determined that the Vietnamese army was likely to start implementing the "MB-84 Beiguang Plan" in the early morning of 12 July.
At 0:30 a.m. on the 12th, various units of the Vietnamese army successively reported to their superiors in the form of radio barcode signals: "Ready". This more clearly confirms the accuracy of our army's judgment.
According to the frequency and wavelength of these radio signals, our radio direction finder and rangefinder immediately carried out tracking and monitoring and electronic scanning of the area, and basically determined that the area where the Vietnamese troops were assembled was 5 to 10 kilometers away from our defense front. So far, the command organs of China and Vietnam have devoted all their energies to the defensive zone of our "Lao Son Main Attack Regiment."
In order to facilitate regional differentiation and operational coordination, our army has divided the Laoshan Theater into three areas: eastern, central, and western.
The eastern region, with the East Mountain of the Bali River as the core, is full of peaks and peaks, the mountains are in a north-south direction, with an average altitude of 1,600 meters, and the national border runs from east to west, and the Chinese and Vietnamese armies control their respective territories.
The western area, with the main peak of the old mountain as the core, is steep in the north and gentle in the south, with 27 large and small hills, all of which are controlled by our army;
In the middle of the eastern and western districts is the Central District, and there is a 4-kilometer-long mountain called Songmaoling in the area. It is bounded by Songmaoling, Viet Nam to the south, and China to the north.
Based on Songmaoling, the east side is a north-south Grand Canyon, and there is a river in the canyon, called the Yingjiang River, which flows from the mainland to Viet Nam from north to south. There is a highway by the river, which is Highway 4, which the mainland supported Viet Nam in those years.
To the east of the canyon is the straight and steep Bali River East Mountain. It is a hilly area within 7 kilometers from Songmaoling to the south, with 56 mountains of all sizes, the highest of which is 634 meters above sea level and the lowest of which is 200 meters.
Seven kilometers south from Songmaoling is the Daqing Mountain of Viet Nam. The mountain is about 20 kilometers long and has an average altitude of more than 1,500 meters in an east-west trend.
At the mouth of the gorge at the confluence of Daqingshan and Bali River, there is a Viet Nam village called Qingshuikou, which was the main transportation route through which the mainland supported Viet Nam and the choke point for Vietnamese troops to enter the Lao Son area.
From Songmaoling to the west, walk 5 kilometers along the mountain beam is the main peak of the old mountain.
The defensive zone of our army is a low-lying land surrounded by mountains on three sides, and the main defensive direction is from Songmaoling to Qingshuikou in Viet Nam.
Based on the terrain and the enemy's situation, the command organs of our army judged:
If the Vietnamese army were to organize a campaign-scale operation in the Lao Son area, its personnel and baggage would have to pass through the Qingshui Pass before they could deploy their forces along the terrain. There is no other way. For this reason, the commanders of our army have set up the operational determination of "driving sheep into the enclosure, intercepting them in sections, closing the door and beating the dogs, and striving for total annihilation."
The so-called "driving sheep into the pen" is to use various means to lure and drive the Vietnamese army into our defensive zone;
The so-called "sectional interception" means using our powerful artillery firepower to disrupt the battle formation of the Vietnamese troops, so that they cannot take care of each other, so that we can destroy each other.
The so-called "closing the door and beating the dogs" means that the Qingshui mouth at the mouth of the gorge is closed with all kinds of artillery fire, so that the follow-up troops of the Vietnamese army cannot come in for reinforcements, and the vanguard troops cannot come back when they come in;
The so-called "total annihilation" means the use of various means of annihilating the enemy to basically annihilate the attacking enemy in this central area.
7 · 12 major victories
From April 28 to May 1, 1984, the 40th Division of the 14th Army of the Army was attached to the 122nd Regiment of the 41st Division after recovering the Laoshan and Balihe Dongshan areas, and then immediately transferred to the defense on the spot.
After Laoshan was transferred to the defensive stage, the 40th Division readjusted its deployment, perfected its operational plan, issued defensive combat orders to the troops in a timely manner, and carried out a series of preparatory work in accordance with the instructions of the military region and the army front commander. According to the enemy's situation, terrain, and combat capability of the troops, as well as the situation of the enemy and the enemy on the battlefield, the firepower is adjusted and the firepower coordination is organized. organizing troops to renovate and construct fortifications, erect obstacles; Hurry up the replenishment and stockpiling of ammunition, war materiel and daily necessities; It is necessary to strengthen the troops' preparations for defense and operations, such as overcoming difficulties, holding their positions for a long time, and establishing ideological education for coexisting with their positions.
In order to thoroughly smash the enemy's "MB-84" campaign plan, the forward command of the 14th Army conscientiously summed up the lessons and lessons of the defensive operation on 11 June, analyzed the characteristics of the enemy's offensive operations, and judged the enemy's troop deployment and main attack direction for another attack.
Judging that our 1072 Heights, 142 Heights, and Bali River East Mountain are protruding from the enemy, their flanks are exposed, and they are attacked by the enemy on three sides, east, west, and south, which is convenient for the enemy to besiege in many directions;
The distance between our 1072 heights and the enemy's No. 74 position and the 411, 251, and 156 heights of the enemy in the direction of Nala was only 100 to 300 meters.
662.6 The highland and the Nala area are the center of our position, and if the enemy succeeds in attacking, it will threaten our main position in Laoshan on both sides, and the east can control the Dongshan area of our Bali River, which is the main direction of the enemy's attack.
The commander of the army and division is determined: relying on the position, sticking to the key points, placing less and more tuns, making up for the situation as it is consumed, using points to control the line and the line to control the surface, and holding on for a long time and fighting independently. The infantry artillery closely cooperated, attacked and defended at the same time, focused on defense, stubbornly resisted, held the position, completely thwarted the enemy's offensive attempt, and exchanged a small price for a big victory.
■ Our soldiers went to the Laoshan position to replenish and reserve ammunition and war materials, and evacuated the wounded and martyrs.
After 20 June, the headquarters of the 41st Division, the main force of the 123rd Regiment, the 1st Division of the 121st Regiment, the main force of the Divisional Artillery Regiment, the 1st Company of the Army Tank Regiment, the 122nd Cannon Battalion of the 11th Army, the 1st Frontier Regiment, and the 100th Mortar Artillery Company of the 17th Regiment were organized to participate in the battle one after another.
The main troop deployment is as follows:
In the area west of the Panlong River, the 40th Division used the 120th Regiment (3 battalions owed) to strengthen the 2nd battalion of the 118th Regiment, the 2nd Army Artillery Regiment (122 cannon battalions), the 2nd howitzer battalion of the 41st Division, and the 1 division anti-chemical company to defend the Laoshan area.
The regiment occupies the position with four infantry companies, two infantry companies are deployed in the front, and one infantry battalion is the second echelon.
The 119th Regiment (owed to the 4th Battalion) strengthened the 7th Company of the 85th Cannon Battalion, 1 squad of the Anti-Tank Missile Company, 1 anti-chemical reconnaissance group, and 1 company of the Army Tank Regiment to defend the 662.6 Heights and the Nala area.
The regiment occupies the position with 2 infantry battalions, 1 infantry battalion is the 2nd echelon located in the Nanlang and Litouzhai areas, and the regimental artillery group is deployed along the road on the west side of the 3rd turn and Nama.
The regimental finger is located on the 627 heights.
The 118th Regiment (owes 2 battalions) is the divisional reserve, deployed in the South Vanfor area, and the regiment is in Manwen.
The 41st Division led the 122nd Regiment and the 2nd Battalion of the 15th Frontier Regiment (6 companies owed) to the east of the Panlong River, responsible for the defense of the 8 Li River Dongshan direction, with one reinforced infantry company occupying the position, two companies in the front, and two infantry battalions as the second echelon to guard the border on the north side.
The 123rd Regiment is a reserve force of the front command of the army, which is deployed in the eastern area of Malipo County. The 15th Frontier Regiment held its existing positions.
The divisional artillery group is composed of the 5th Regiment of the 4th Artillery Division of the Military Region (owing 2nd Battalion) and the 152nd Cannon Company of the 15th Frontier Regiment.
The division's antiaircraft artillery battalion (2 companies and anti-aircraft company) and 1 anti-aircraft missile company were deployed in the Laoshan and Bima areas to ensure the anti-air safety of the division's headquarters and some artillery positions.
After more than a month of meticulous preparations, on 12 July, the Vietnamese army dispatched the 141st, 149th, 174th, 226th, 876th, 198th, and 821st Special Regiments to launch an attack on us in five ways to strengthen the size of the division.
After nightfall on the 11th, the enemy gradually spread out in the direction of our ship's bow.
Deputy Chief of General Staff Li Yuxian and Commander of the 2nd Military Region Wu Li sat in Ha Giang, while Deputy Commander Li Weimi and Deputy Chief of Staff Pei Wensheng led the front commanders to supervise the battle in Guyi.
"Zhan," deputy commander of the 356th Division, "Li," deputy commander of the 316th Division, and Pei Nile, deputy commander of the 313th Division, respectively took direct command in the direction of Nanga, Qingshui, and Dongshan of the Bali River, in an attempt to explore a frontal breakthrough, contain the two flanks, and attack centripetally.
In the early morning of the 12th, the war zone was filled with dense fog, and the Vietnamese special forces detachment infiltrated the gap between our forward positions. Our forward garrison has repeatedly detected the sound of mine explosions, the sound of cutting down trees, and the sound of people moving.
At 2:30 a.m. on 12 July, various units of the Vietnamese army sent a telegram in the form of a radio barcode to their superiors saying "Meal has been completed", which indicated that the Vietnamese army had begun to move towards our defensive front.
After learning that the Vietnamese army had begun to move towards our defensive front, the command of our army ordered:
-- Ordered the 4th Artillery Division to carry out a 10-minute rapid fire attack with 130 howitzers (large-caliber long-range guns, firing range of 30 km) on the Vietnamese army's rear supply bases, artillery positions, follow-up units, support units and other areas where troops may be assembled or stationed, and after the results of the battle are obtained, the artillery fire density will be increased;
-- Order the 320th Artillery Regiment to carry out a 10-minute fire attack on the area near the enemy's Qingshui Kou with 122 howitzers, and increase the intensity of artillery fire after the results of the battle;
-- Ordered three small-caliber artillery battalions to carry out a 10-minute fire attack within 3 kilometers of our defensive front, and then switch to large-caliber artillery fire after achieving results......
As the order was issued, 10,000 artillery guns rang out in our position, the ground shook, and the entire Laoshan theater immediately turned into a world of howling and fire.
At 2:50 a.m. on 12 July, after the first rapid fire attack by our troops, all units of the Vietnamese army moving towards us were attacked to varying degrees, and some suffered heavy losses.
At the same time, this sudden attack also forced the Vietnamese troops to rush to Qingshuikou like a tidal wave, and they densely entered the front line of our defensive position like locusts, looking in the east and west, shouting, insulting, and colliding with each other. Some Vietnamese troops simply shouted loudly on the radio: "Our unit was blocked by enemy artillery fire in such and such an area, and could not reach the high ground of XX on time, so I request that the enemy artillery be suppressed......
The Vietnamese artillery also reacted quickly, shelling our heights No. 146, No. 169, and No. 142, and sporadically shelling at No. 1072.
At 3 o'clock in the morning, the front commander of the 2nd North Vietnam Military Region sent a telegram to all units: "Quickly occupy the starting position of the offensive and act according to the original plan."
After receiving this information, the command of our army immediately ordered all artillery units to carry out carpet bombardment of the rear of the Vietnamese army at the mouth of the Qingshui Kou and the front of our army's defensive positions as planned to suppress the enemy's artillery in depth. The artillery of the 41st Division fired surveillance at the forward line of Heights No. 34, giving the enemy a mental shock and forcing his formation to be disorganized, and some of his troops were deployed out of control.
Although our army's artillery fire has been continuous, although some Vietnamese units have collapsed before they have launched an offensive, and although some Vietnamese offensive detachments have suffered heavy casualties, the Vietnamese army has still carried out offensive preparations in accordance with the original coordinated plan......
At 3:50 a.m., the 168th Artillery Brigade and 15 artillery battalions of the Vietnamese Army again launched a surprise fire attack on our defensive positions at Heights 100, 116, 150, and 634, Nam Lang, and Bow of the Ship in accordance with the coordinated plan. At the same time, the infantry detachments of the Vietnamese army, which had arrived at our guard positions, began to clear mines and break down obstacles and open up roads.
Based on this, the command of our army determined:
With two artillery regiments, they made every effort to blockade Qingshuikou, so that "no one is allowed to enter" and "no Vietnamese troops within Qingshuikou will be allowed to go out";
An artillery regiment carried out a non-stop bombardment of the Vietnamese army in the east mountain of the Bali River, so that it could not threaten our army from a high position;
an artillery regiment to support the battle of the main peak of the old mountain;
With one artillery regiment and five rocket artillery battalions, we carried out repeated combing bombardments on the front of our defensive positions;
Three small-caliber artillery battalions were used to carry out high-density bombardment on depressions, anticlines on hills, and dead corners to attack the enemy's command posts and second-ladder tun sites;
With two battalions of 85 cannons, the artillery was pushed to the forward positions to destroy the enemy's tanks.