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The enemy's progress in Xiao County is slow, there are several armed forces such as the Miyayama Brigade that need to be settled, and many soldiers of the Miyayama Brigade have been trained in the advancing column, and have supported a number of mines and sniper rifles, and it is not easy for the enemy to easily destroy these green forest forces that cannot be defeated and run; Although the enemy of Dangshan could not arrive on time under the harassment and attack, it was the greatest threat to destroy the enemy behind the enemy in Xiayi.

For this counter-sweep, not only did all the troops and horses of the three columns go into battle, but Yang Tianfeng also ordered the joint defense units of all villages and towns to also concentrate on their actions and dig trenches and ditches in the predetermined combat areas, so as to create more favorable conditions for the three columns to resist the enemy.

After a continuous march, Yang Tianfeng led his troops to Mangshan Town, north of Yongcheng, at noon. After resting and rectifying for a while, Yang Tianfeng led his troops to set off again and rushed to the preset position more than 30 miles north of Mangshan Town.

In the north of Mangshan Town, there are Moshan, Mashan, Xushan, Zhoushan, Wangshan, Yushan and so on of Mangdang Mountain Group, although the mountain is not high and steep, it is the commanding height of the vast eastern Henan Plain, it is the natural barrier to enter the Central Plains, so it is the place where soldiers must fight since ancient times. And Tiejiao Mountain, which had just blocked the enemy of Xiayi, was also one of the Mangdang Mountain groups.

After learning that the Japanese army was sweeping in three directions, the Third Column sent a regiment (less than the number, about 800 people), led by Chen Dalong, and transferred thousands of joint defense teams to build fortifications in Moshan, Mashan, Xushan and other important places, preparing to resist and consume the enemy.

The successive arrival of the 61st Regiment brought about a great change in the battle plan. Yang Tianfeng's combat determination also changed, and he had the confidence to break through and annihilate the enemy.

After destroying the enemy at Xiayi, the battle losses of the 3rd Column and the 61st Regiment were not very large, and the 3rd Battalion of the 61st Regiment would soon arrive, which undoubtedly restored the strength of the troops.

The same more than a thousand enemies, the same devil of a squadron, the enemy of Xiayi is finished, can the enemy of Dangshan also be annihilated, or will it be a heavy hit?

Others see the enemy in person, but Yang Tianfeng thinks long-term. If the strength of the enemy in Xiayi and Dangshan is greatly reduced, the Three Columns can take advantage of the situation to expand their territory and invade and control many villages in Xiayi and Dangshan. With the support of taxes, food, manpower, and resources, the three verticals will be able to expand again, and may be able to meet Yang Tianfeng's first stage requirements - full staff.

"The chief is coming so fast!" Chen Dalong was quite surprised by Yang Tianfeng's rapid arrival of help, pointed to the fortifications being built on the mountain and said: "The enemy is expected to come here tomorrow afternoon, with these fortifications, it will not be a problem for my detachment to be on top for three or two days." There's also a line of defense in the back, which you should have seen when you came over. Fight every day, the enemy has not been seven or eight days, and he can't see the shadow of Mangshan Town. ”

"Your detachment was strengthened in the number of machine guns, and harassing attacks on the enemy were also successful. Hold on for seven or eight days, I also believe it. Yang Tianfeng pondered for a moment and said, "The sixty-first regiment came to help, and it really gave us a lot of help. How to make good use of this favorable factor to inflict heavy losses on the enemy, or even to deal a annihilating blow, is a question we have to consider now. ”

After a pause, Yang Tianfeng continued: "It is feasible to fight steadily, drag down and consume the enemy, but according to the changes in the situation of the enemy and us, it is a little conservative. ”

"How do you change your battle plan, sir?" Chen Dalong also knew that with reinforcements and the destruction of all the enemies, the comparison of the strength of the enemy and us was no longer the beginning of the sweep.

Yang Tianfeng smiled, waved his hand and said, "You continue to dig and build trenches and fortifications, and the change of the battle plan will have to wait a little longer." With that, he turned and walked away under the protection of the guards.

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In the War of Resistance Against Japanese Aggression, because the enemy was strong and we were weak, the "trench warfare" practiced in most of the defensive operations of the Chinese army X was a passive defensive war. And even in trench warfare, the Chinese X Army was lackluster, and it was even inferior to the 19th Route Army during the Shanghai War of Resistance in 129 years ago.

In the final analysis, it is not that the trenches are not useful, but that the fortifications are too poor.

In the Battle of Songhu, due to the lack of experience in building fortifications, the first-rate troops of the Central Army generally could only harden for seven days before they suffered casualties; As for the other troops, they were crushed in only three days; In contrast to this, the Wang Xiu Department of the Northwest Army, although it was a miscellaneous unit, was in Liu Xing for nine days, because they were relatively good at fortifications.

Throughout the frontal battlefield of the War of Resistance Against Japan, one of the biggest problems of the National X Army in military affairs was its rigid tactics, both when attacking and defending.

The so-called trench warfare, in the understanding of many people, seems to be the construction of an endless trench, plus all kinds of guns and cannons. Unfortunately, many high-ranking Kuomintang officers at the time understood it this way.

As a result, the anti-enemy front of the National X Army is usually linear, lined up in one line, and the biggest problem with this formation is that once the enemy breaks through a little, it will quickly break through to the rear of our army's battle line, and carry out interspersed division and encirclement of our army, so that the entire front of our army will be ineffective.

Moreover, this will disrupt the rhythm of our army's retreat and redeployment, forcing our army to retreat again and again in a state of confusion, unable to form a solid front to stop the enemy's advance, so that the rout will repeat itself again and again.

When Zhou Zhizhong led the reorganized troops to the preset position in Mangshan Town at dusk, even though they had the tradition of the Northwest Army and were good at building fortifications, Zhou Zhizhong and other officers were surprised by the trenches and bunkers that had been dug and built by the Third Column and the Joint Defense Team.

Speaking of which, this zigzag trench is not an advanced, complex thing, and in World War II, it was just a standard fortification in the European theater. Zigzag trenches, as the name suggests, are built into zigzag trenches to effectively defend against enemy shelling. Compared to ordinary linear trenches, zigzag trenches are five to ten times more effective against artillery. Moreover, it can effectively defend against strafing and dropping bombs along the trenches.

I was naturally surprised if I hadn't seen it, but after a little pondering, a battlefield veteran like Zhou Zhizhong also understood the usefulness and wisdom of the zigzag trench. What's more, there are also cat ear holes dug in the zigzag trenches, which can improve the defense effect even more.

Coupled with Yang Tianfeng's tactics of first attritioning and exhausting the enemy, and then besieging and annihilating him, Zhou Zhizhong and others, who were accustomed to the straightforward style of regular warfare, had to think about it. According to the comparison of troops, a regular regiment with three columns can completely besiege on all sides, but Yang Tianfeng cherishes the lives of his soldiers very much, and would rather have more means and more time, and try to wait for the best opportunity to destroy the enemy.