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The predecessor of the 67th Army was the Second Column of the North China Military Region, and before that, it was the 115th Division Independent Regiment, the 120th Division Yanbei Column, and several military divisions in Jinchaji.If we go back to the source, the 67th Army has the old background of the Red First Army.

When the 67th Army took over the defensive positions of the 64th Army, the 64th Army had already built tunnels and fortifications on Huayue Mountain and more than a dozen surrounding hills. There are few holes, all the way to a place about 10 kilometers away from Gapyeong.

It is precisely because the defensive positions of the 64/67 Army are under the eyes of Gapyeong County occupied by the US military, the US military very much wants to flatten this salient part.

But the terrain guarded by the Volunteers is also very favorable.There is a small road at the bottom of the Daming Valley, Huayue Mountain on the east side of the valley, and Lianren Mountain on the west side of the valley. Neither of these two peaks is a single peak, but a main peak plus more than a dozen hills.In the fifth battle, Van Fleet wanted to forcibly break through the Daming Valley and rushed to Yeoncheon to rescue the 24th Mibu Division. Although the 15th Army was seriously injured, it still did not protrude out of the mountainous area.

What Zhisi and the War Information Center did not know was that in January 1952, Ridgway and Van Fleet had a secret meeting, and the two reached an agreement on the next step of the Korean battle: the front line between the United Nations Army and the Chinese Army has stopped, and they want to use It is not realistic to allow the United Nations Army to get the desired land "in one step" in one battle, but it can concentrate superior artillery fire and elite infantry in a local area, bit by bit eating away at the Chinese army's defense line.The purpose of each battle is to capture two or three hills, and slowly regain the lost places.

There is no doubt that the current artillery fire of the United Nations Army still has a three to one to four to one advantage, and the elite infantry used to rush to the front line is of course the South Korean Army.

1952年3月2日，在北海道训练的南朝鲜军第1、第4、第6师完成了全部科目的训练考核，海运回到南朝鲜。这三个师各自编制已充实到21000人（未整编过的其他南朝鲜军一个师只有15000人），不但武器装备和美军步兵师基本一致（除了缺“潘兴”中型坦克），士兵训练和军官养成也由美国海军陆战队第一师一手调教。

"Chief of Staff Su, I remember that I discovered the information that three South Korean divisions were conducting long-term training in Japan at the end of last year," Tang Hua said.

Su Yu: "After you sorted out the information, we reminded Zhisi, and Zhisi also reminded them when the 20th Corps entered North Korea to change defenses. It seems that the 67th Army still lost in a careless way."

On March 3, the 13th Division of South Korea moved to the surrounding areas of Gapyeong and merged with the 4th Division of Mipo.

Since mid-March, the detection station of the Volunteer Army has heard a large number of intensive wireless telegrams from the long-lost United Nations Army. Wang Yongjun deciphered it at the 3th Center and deciphered that this is the new South Korean 50th Division. At the same time, the 4th Artillery Division of the Volunteer Army was transferred to the back of Huayue Mountain to stand by.

3月22日，美军和南朝鲜军调集了8个重榴弹炮营和3个75毫米轻榴弹炮营，开始轰击志愿军占领的华岳山前的430和437高地。这两个高地的阵地其实不算宽阔，67军199师在每个山头布置了1个加强连守备。在美军优势炮火的轰击下，两个连留三五个观察哨在地表，其余部队进入反斜面的坑道工事。

进攻的南朝鲜军人数也不多，是南4师8团1营的A连和D连，各加强一个战斗工兵排。联合国军的重炮一直持续支援到南朝鲜军距离志愿军阵地500米时才停火，75毫米榴弹炮则一直持续炮击到双方距离350米。

After the smoke cleared, the two companies of the 199th Division went from the tunnel to the surface trenches and bunkers, and saw more than 200 oil barrels arching up from the mountainside...

In addition to guns, ammunition and explosives, the South Korean Army each pushed an empty gasoline drum. Although there was no oil in the drum, it was stuffed with wet quilts, dead grass, and branches.When the volunteers on the top of the mountain opened fire with all their strength, it was difficult to hit the South Korean soldiers climbing the mountain.Seeing that the oil barrels were pushed closer and closer, with a distance of tens of meters, when the volunteers were preparing hand grenades and bayonets for close combat, the South Korean army first threw a grenade behind the oil barrel...

In short, this battle was fought inexplicably. Under the command of the commander of the 199th Division, the companies on the 430th and 437th highlands withdrew from the top of the mountain and retreated to the tunnel behind the ridge line.Under the command of the former finger of the 67th Army, the two artillery regiments of the 8th Artillery Division and the three artillery battalions of the 67th Army immediately opened fire, covering the 430 and 437 highlands that had just been lost in the surface positions with shells.

And at this time, the soldiers of the South Korean 4th Division who had reached the top of the mountain had pulled out the wet quilts, dead grass, and branches from the oil drums, and then they got in...

The shell of the oil barrel can be immune to most shell fragments. Unless the shell directly hits the oil barrel, South Korean soldiers cannot die.Some South Korean soldiers also put empty oil drums in the trenches, which has better bulletproof effect.

In short, the anti-coverage effect of the Volunteer Army's artillery fire is very unsatisfactory.When the 199th Regiment of the 596th Division organized two reinforcement companies and wanted to retake the hill with the volunteers in the tunnel, the first wave of attack was beaten back.

The South Korean army has occupied the hill, and it's not over yet.Didn’t they take out the wet quilts, dead grass, and branches from the empty oil drums just now? Now South Korean soldiers are looking for the entrances and ventilation holes of the volunteer tunnels everywhere on the mountain. The wet quilts are wrapped in dry grass and branches. Vent plugged.

The volunteers guarding the two hills now have [-] grass and mud horses galloping past. Is it because they are all oriental, so the Chinese will actually know all the tricks that the South Koreans know?

The company couldn't bear the choking anymore, so they had to withdraw from the tunnel under the cover of rear flat-air guns and anti-aircraft machine guns, and climbed down the mountain.

The fall of the 430 and 437 highlands during the day not only alarmed the 67th Army headquarters, but even alarmed Zhisi. Li Xiang, the commander of the 67th Army, is going to use the 201st Division of the reserve team to launch a regiment-level counterattack, but Zhisi is now a little afraid that the 67th Army will lose the chain, so he simply let the old elite on the Eastern Front-the 39th Army, do this.

During the daytime on March 3, the 23th Division of the Volunteer Artillery began artillery preparations in the afternoon.The number of heavy artillery also reached dozens, bombarding from afternoon to evening. On the night of the 8rd, the 23th Division of the 39th Army dispatched two reinforced battalions, and the 116th Army dispatched two companies to lurk in close combat at night and recapture the 67 and 430 highlands in one breath. A company, but was eventually driven down the mountain.

During the daytime on the 24th, the United Nations Army began shelling the two highlands again. In order to reduce casualties, the 116th Division also withdrew its reinforced battalion. On the 430th and 437th heights, there was still a reinforced company of the 67th Army and an engineer platoon.

On the night of the 24th, the South Korean 4th Division launched a night attack...

The Korean War has been going on for nearly two years now, and the number of night raids launched by both the U.S. Army and the British Turkish Army and the South Korean Army can be counted on one hand.However, this time the night attack of the South Korean 4th Division really succeeded—or partially succeeded.On Highland 437, the attacking troops of the 4th South Division were spotted and suppressed in the middle of the mountain by automatic firearms and grenades. The mortars of the Volunteers in the rear were more accurate in finding spots. The South Korean Army failed to capture Highland 437, and the casualties were still low Small.However, Highland 430 was recaptured by the South Korean Army.

On the 25th, that is, yesterday, the Volunteer Army discovered that because the 430 Heights were taken away, the heavy artillery battalion of the United Nations Army had moved forward. Now, if the Volunteers want to recapture the 430 Heights, it is not as simple as before.

……

"During the battle for the 430th and 437th highlands, the 8th Artillery Division mastered the use of artillery computers and communication equipment, and the response speed to fire requests from the front line was greatly improved compared with before, and the accuracy of artillery bombardment was also improved.  … 39th Army 116 The division's night attack counterattack was resolutely effective.... In the first day of the battle, the 199th Division underestimated the enemy's fighting will and did not make sufficient preparations for the new tactics adopted by the enemy....This battle also exposed Some of our army's existing hand-dug tunnels have design flaws. If the enemy finds a weak point, the tunnel will be in a disadvantageous state. The experience and lessons of this battle should be summed up, especially the tunnel design. Find a solution as soon as possible, and promote it throughout the volunteer army, and quickly improve tunnels with the same defects in other areas.”

Awkward……

I believe the 67th Army is more embarrassing than Tang Hua.

Tang Hua: "This oil barrel tactic...does it mean that the slopes on the enemy side of the 430 and 437 highlands are relatively gentle? If the hillside is very steep, then even an empty oil barrel is not easy to push."

Su Yu: "Another report by Zhisi summed it up. If the slope exceeds 40 degrees, it is difficult to push the empty oil drum. In fact, even if the slope is below 40 degrees, if the South Korean army pushes the oil drum to attack, their infantry The speed of climbing the mountain will also be greatly affected. The fundamental reason is that the 199th Division was not prepared for this tactic. If the South Korean army still uses the same method to attack in the future, we will not be afraid, and now we have found a way to deal with it.”

Tang Hua looked at the statistics in the report again.In this repeated battle for the two highlands, the Volunteer Army suffered 850 casualties, and it is estimated that the South Korean Army suffered about 600 casualties.

One of the 430 and 437 highlands was taken away by the South Korean Army. First, it lost 1.8 square kilometers of land, and second, it gave the U.S. Army in Gapyeong County and the South Korean Army a little more space for activities, which was also a loss.

The advantage is that the entire volunteer army now knows that the South Korean Army after the American-style reorganization and training is not the messy army it used to be. This kind of army is quite effective.

……

Suwon, the headquarters of the U.S. Eighth Army.

After three days of fierce fighting on the 430 and 437 highlands, after the battle line stabilized, Van Fleet was delighted.

Not only did it take back 1.8 square kilometers of land, but it was not just because many volunteers were killed.

"The battle in front of the Daimyo Valley proves that the trained South Korean army has good combat effectiveness and fighting will. This should be attributed to the long-term closed training in Japan. From the grassroots officers to soldiers, they have finally mastered the basic tactical literacy. Operation of complex heavy weapons. The long-term closed training also cultivated the camaraderie among the soldiers of the grassroots units of the South Korean army, which greatly improved the team cohesion."

"The mode of conducting closed training in Hokkaido should continue. After the current three South Korean divisions complete the training, it is recommended that the United Nations Command send another three South Korean divisions to Hokkaido for training. By then, the South Korean army will truly rise. "

"This battle also confirmed one thing from the side: the cipher machines used by our army and the South Korean army did have security problems, and they may have been jointly cracked by the Soviet and Chinese intelligence agencies. From the Battle of Qingchuan River to the Second Battle of Seoul There have been suspicious incidents in our army many times - even the rapid change of marching direction or the high-speed assault of the armored troops seem to fail to achieve the suddenness of the battle. In addition, I also suspect that the capture of General Walker is also related to the capture of the cipher machine. It is related to cracking. In February this year, the United Nations Army completely eliminated the old cipher machine and replaced it with the C2 cipher machine. So far, I have never found this confusing battlefield phenomenon. Perfect suddenness. I can be sure that the Chinese military’s cracking of our intelligence in the past has been completely ineffective in front of the C52 cipher machine. This is something worth celebrating.”

Chapter 207, Navy Five-Year Work Plan

This telegram from Van Fleet is really... hard to describe.

After the training, the combat effectiveness of the South Korean army has indeed risen to a higher level. Zhisi and Suyu also agree on this point.This also allows the Volunteer Army and the People's Liberation Army to have a basic concept of "standardized production of qualified troops" in the modern military system.They all have to admit that under the modern training system and scientific management, the South Korean divisions produced one by one using the same template may not be powerful troops full of dominance, but at least they are qualified products with stable quality.

As for the C52 cipher machine, to be honest, 50 Center broke the C2 cipher machine for the first time at the end of February.This time I was caught off guard. It was really the 52th Army and the 67th Corps who were careless.The resulting misjudgment by Van Fleet was purely accidental.

The Volunteer Army generally had an attitude of contempt for the South Korean Army before. The reason is of course the poor performance of the South Korean Army in the first to fifth battles.So much so that several old commanders in the central government felt that the South Korean Army "has better equipment than the five main forces, and its tactical quality and will are not as good as the second-rate troops of the national army."

Before the 20th Corps entered the DPRK, according to the usual practice, when each army trained in the Northeast, it incorporated hundreds of veteran volunteers who had participated in the war as instructors.The old volunteer commanders' evaluation of the South Korean Army made the 67th Army feel that the South Korean Army could not take it seriously.Because the attitude is not correct, so this time the car overturned.

说回50中心，C52密码机是被TC51攻破的，在TC52超算运抵蛟河的前3天。

On February 2, our army intercepted for the first time a secret message that could not be deciphered by the M-8 algorithm.According to the early warning issued by Tang Hua, Wang Yongjun began to pay attention to classify and collect such secret messages. A few days later, he confirmed that the new generation of cipher machines of the US military had been activated.

As for the configuration of the C52 cipher machine, Tang Hua sent Hagelin's patent US2765364 early on. At the end of January, the Soviet Union also shared with China some new information they obtained from Hagelin's company, and confirmed the C1 cipher machine's design. real configuration.

It is indeed what the US2765364 patent looks like, and even the 6 spare letter hubs in the patent design, the U.S. military subscription version was canceled in order to save money.

Therefore, the C52 cipher machine has 6 key wheels, labeled with numerical serial numbers, and the "key" is a string of 12-digit numbers.

The maximum unique number of C52 is more than 27 billion, while that of M-209 is 1.1 million.

Of course, as a mechanical cipher machine, C52 still has some inherent defects. The key of each two-digit group cannot use too small numbers, and the actual strength is about 12 to 15 billion.

Here you have to admire Wang Yongjun, Lao Wang is now the world's top algorithm optimization master.

Tang Hua now has a paper written by Wang Yongjun in his hand, and it has been mailed over, but he just doesn't know how to publish it-Supercomputing has not yet decrypted it.

Not deciphering it is one aspect, on the other hand, Lao Wang's paper is so watery that it is unmatched.