Half a year later, the Korean War broke out. Soon, Yang Tinghui led his troops north, crossed the Yalu River majestically, and participated in the fifth campaign. At this time, the structure of the Second Division had undergone great changes, Jiang Jiahu was transferred to the commander of the Third Division, Zhu Zhudao was promoted to deputy division commander, and Qu Xiangqian was the commander of the First Regiment; Chen Mohan was promoted to chief of staff of the division, and the commander of the second regiment was Yu Caojin; Zhao Wuxian was promoted to deputy political commissar of the division, and Ma Xiping served as the political commissar of the Second Regiment. Yue Xiuying, Yu Zhen and several other female comrades were all transferred to the division and worked in An Xuemei's Ministry of Health.

In the final stage of the five campaigns, the 2nd Division participated in the Jingjin River Blockade Battle, which covered the retreat of a certain corps on the Eastern Front, and the specific task was to deploy on a 20-kilometer-wide frontage in the area around Thanh Howa Lane to resist the onslaught of two divisions of the United Nations Army and two regiments of the South Korean Dinh 1 Quan Division. This time, the defense plan was formulated by Chen Mohan.

The time was tight and the task was rushed, but Chen Mohan still thought of all aspects of the situation. According to the analysis of the battlefield situation and Liang Bida's consistent habit of employing troops, Chen Mohan planned to deploy the second regiment of his old army on the front line where the situation was most severe, and Tao Sanhe's third regiment owed one battalion to defend on the right flank. It is relatively flat, with a flat river in the background, and the highway from Seoul to Pyongyang is interspersed, making it easy for mechanized movements. After the enemy's offensive is launched, this line will be the main target of aircraft and artillery fire, and the 2nd Regiment must stubbornly withstand the previous rounds of attacks, and wait for the main force to gain a firm foothold on the second line of defense before retreating. Chen Mohan planned to use Qu Xiangqian's regiment to reinforce a battalion of the third regiment to defend the Taishan area, which is a place of lofty mountains, lofty peaks, dense forests, dangerous forests, rugged roads, easy to defend and difficult to attack. The rest of the troops directly under it are ready to be reinforced, as reserves.

In other words, Chen Mohan's battle plan was to put the Second Regiment of his old army in the position of light, and the task given to the First Regiment of Liang Bida's old army was relatively less stressful.

The reason why Chen Mohan did this naturally has his reasons, and it can also be said that there are unspeakable secrets.

In the past few years, in the south of the country to attack the city and suppress bandits, under the command of Liang Bida, each time is a regiment as the main attack, the second regiment is responsible for the task of clearing the periphery, although on the surface it seems that the task of the second regiment is a secondary position, but because it is the first to contact the battle, the lone army is deep, every battle, is a loss of soldiers, was beaten to a blue nose and swollen face, and at this time the enemy's confidence has been clearly felt by the second regiment, and at the same time the second regiment is entangled by the division veterans tired, heavy consumption, at this time to use Zhu Zhudao's regiment, elite soldiers, morale is booming, In one go, the final victory was won.

In the post-war evaluation of merit awards, the first regiment was naturally the first to make the first contribution, while although the casualties of the second regiment were much larger than those of the first regiment, because it was not the main attacking force, it would always be a supporting role.

Chen Mohan expected that this blocking battle would be a vicious battle, and in the first round Liang Bida would probably have to let the second regiment take the lead, and when the second regiment dragged the pursuing enemy tired, dragged down, and dragged the soldiers without fighting spirit and determination to do so, the first regiment would descend from the flank and win the final victory in the defensive battle. But this time Chen Mohan was wrong.

When Chen Mohan reported the operation, Liang Bida drilled into his tunnel, chewed it carefully for more than ten minutes, and then returned the plan to Chen Mohan's hands, there was no change in other deployments, such as the use of artillery firepower, the construction of engineering fortifications, the position of antiaircraft artillery in the air, the echelon configuration of the defense forces in depth and the obstacles in front of the formation, the reserve standby area, and even the rear ammunition supply plan. However, Liang Bida made a small change in the key place of this plan, he took the eraser and gently wiped it, erased off the "two" character of the second regiment, and added a horizontal to the "one" character of the first regiment, so that the tasks of the first regiment and the second regiment have fundamentally changed, and in the defensive battle that is about to begin, the first regiment will be the first regiment to fight hard, and the second regiment may become the victorious hero unit that finally cleans up the results of the battle - Chen Mohan was deeply surprised by this.

The battle plan was reported to the army and corps by radio and was approved. Immediately after that, preparations for implementation began.

The military headquarters and the corps headquarters issued several circulars in a row within a day and a half, all of which were about the dangerous situation of friendly and neighboring troops, the vital significance of the Thanh Hoa Lane defense line to stabilizing the battle situation, and the enemy's determination to win the Thanh Hoa Lane defense line. ”

It was only at this time that Chen Mohan suddenly realized that this is not a siege and suppression of bandits in China, if you can't attack it today, there will be tomorrow. Once the line of defense is broken through, the whole line of our army will be crushed in this direction, and the troops of several divisions may be scattered by the enemy. In the face of such a major task that has a bearing on the overall situation, Liang Bida can't act according to the old way of thinking, he still can't trust the second regiment, he is afraid that the second regiment will not be able to withstand it, resulting in a passive situation.

Knowing this, Chen Mohan felt sad at the same time, but also gratified, he thought that he may have had a lot of misunderstandings about Liang Bida in the past, saying that whoever and whose troops are family troops, and whose troops are non-main forces, and it may be a bit of a bit to favor one over the other, but it is nonsense to say that whoever has ill intentions, deliberately preserves his own strength, and deliberately lets his troops touch the nail and be consumed. In Liang Bida's words, they are all Communist Party troops, and they all obey the command of Mao **, and the troops only have different establishment sequences, and there is no distinction between relatives and relatives.

In the past, Chen Mohan did not believe Liang Bida's statement, nor did he believe it all. Now he does not disbelieve it, nor does he believe it completely. But now the feelings are different, in the face of the overall situation, Liang Bida put his fist troops on the blade, and he was ready to shoot light, which shows the mind of a senior commander.

Liang Bida's troops had only one day to prepare, rush to repair their positions and build fortifications. By the early morning of that night, the forward of chasing the enemy had arrived, but it was much beyond Chen Mohan and Liang Bida's expectations - the focus of the enemy's attack did not choose the difficult to defend and easy to attack, but to attack Taishan in a big way. Within two hours, the positions of the 2nd Regiment were subjected to tens of thousands of tons of steel explosives. There were planes in the sky and tanks and artillery in the ground, and they took turns to dive and bomb, and not only Liang Bida and Chen Mohan were stunned, but even the corps and the army did not touch the enemy's true intentions for a while.

By dawn the next day, the position of the 2nd Regiment was already a scorched earth, with more than half of the casualties, and at this time there was no sign of the enemy's attack on the position of the 1st Regiment.

Chen Mohan said to Liang Bida that now that the enemy's intentions are clear, he just expected that the area around Kan that we had obtained would be a key defensive area, and that it would be light to avoid the important and light, and that attacking Taishan was a surprise to us. We can consider adjusting the strength of the troops, and we must strengthen the Taishan Ridge.

Liang Bida was on the hillside outside the tunnel of the headquarters, holding the telescope in both hands, looking at the direction of the fiery Taishan Mountain, and was silent for a long time.

Chen Mohan saw that Liang Bida didn't say anything, so he had to give Yu Caojin and Ma Xiping another death order: "If you have one soldier left, you must not take half a step back." ”

By the afternoon of the same day, the US and ROK troops had launched 16 rounds of company-battalion attacks on Taishan, and some positions fell into the hands of the enemy, Yu Caojin and most of the battalion and company cadres were killed, and Ma Xiping gathered less than a battalion of troops to repeatedly fight for positions with the enemy, and the two sides launched a white-knuckle battle.

Under the cover of powerful artillery fire, the attacking enemy relied on absolute superiority, and was still brave during the day, but at night, it was a face-to-face fight, and it was not an opponent. After a bloody battle, the position was lost and regained.