Seeing that the 47th Wing could not open up the situation, the commander of the 6th Division of the Japanese Army, had to apply to the 10th Army for the support of the 6th Brigade of the Army's field heavy artillery.

At noon on December 12, the Japanese heavy artillery brigade finally arrived at the outskirts of Nanjing with field heavy artillery and began to build artillery positions.

The 10th Army agreed to the request of the 6th Division and began to use 240mm heavy howitzers, which weighed 200 kg in a single shell and had to be transported into the barrel by cart.

The firing range can reach up to 10 kilometers, in the suburbs of a few miles outside the city of Nanjing, its power can be imagined, the Japanese army is not much equipped with this kind of super-large caliber artillery, a heavy artillery brigade is one or two, mainly used to siege the city.

Such a huge super cannon, the single barrel is nearly four meters long, and the weight is more than 30,000 kilograms if it is shielded, that is, more than 30 tons.

It had been used in the Songhu battlefield before, and now the Japanese army's engineering units have been repairing the Beijing-Shanghai railway line from Shanghai to Nanjing day and night before it can be transported.

The Japanese Tenth Army originally wanted to wait for the Meiji 45 style 240 heavy artillery to be delivered before launching a general siege attack on Nanjing, but the following divisions could not wait to fight in advance in order to compete for the first prize.

But after two days of fighting, it still didn't come down, and in the end it had to wait for 240 heavy artillery to come and bombard the city wall of Nanjing.

On December 12, the Japanese army's 240 heavy howitzers began to roar, and the wall of Zhonghua Gate, which had stood for hundreds of years, collapsed after the explosion of 200 kilograms of shells.

The entire Zhonghua Gate city wall shook, some of the defenders on the city tower almost shook off the city tower, and a considerable number of people were killed on the spot.

Note: According to the book "The History of the Nanjing Garrison", Tan Daoping, chief of the staff office of the Nanjing Garrison Commander's Department, later recounted, saying:

"Heavy shells, bombarding the Zhonghua Gate, the solid shell of the city wall, and the rotten stones that were shattered to thousands of pieces, flew in the air and threw them at all the houses, and the houses immediately collapsed, and the mud and sand in the stone shells rushed down, like a river of quicksand."

……

Under the bombardment of the Japanese army's huge artillery, the wall of Zhonghua Gate finally collapsed, and the wall of the capital collapsed, but the will to fight could not collapse, and the 306th Regiment immediately organized personnel to take remedial measures.

There was a sea of fire on the city tower, more than 30 planes were bombing and strafing, and the Japanese heavy artillery extended the bombardment, and at the gap in the collapsed city wall, about 300 Japanese troops swarmed in and climbed into the Zhonghua Gate City.

These hundreds of devils thought that they were the first to rush into the Chinese capital, but they didn't expect that when they rushed in, how could there be a city wall?

What's going on? Isn't the city wall already blown down by cannons, how can there still be a city wall? Of course, this is just talking, and the devil naturally knows that this is inside the urn city.

The devil's plane and observation balloon have already probed the city wall of Zhonghua Gate and the urn city very carefully, and now even if they know that this is the urn city, they are going to rush in.

The 306th Regiment ordered the three battalions on the Zhonghua Gate to fire on the enemy's follow-up troops outside the city wall, and on the other hand, it ordered the first battalion and two companies of the reserve on the urn city to cover the devils in the urn city with fire.

Needless to say, what is the consequence of this, the ancients said: catching turtles in urns, urn city is a trap with walls on all sides, high walls on all sides, and there is no place to hide in it.

Running to such a place is tantamount to death, and the reserves of the 306th Regiment have been holding back for many days, watching the brother troops in front of them forgetting to die, but they are doing nothing in the back, which is extremely uncomfortable.

Now that I have finally caught a chance to vent my anger, these more than 300 devils, if the two armies face each other, it is estimated that it will be difficult for the entire 306 regiment to be eaten all.

However, there is no way to go in heaven, and there is no way to go in hell, these devils have fought for a long time, but they found that they just fought into the ghost gate.

What was waiting for the devils was that all the light and heavy firepower of the first battalion and the second company and the anger of more than 100 people were all poured into the small urn city, and for a time, under the countless bullets flying, more than 300 devils, almost without any chance to fight back, were all killed in the urn city.

No matter how powerful the devil is, it is also a human being, and it is also a body, under the high-speed shooting of the fiery steel bullets, bursts of blood mist were splashed, especially after the continuous bullets of the machine gun hit, the bodies of many devils were smashed and torn into several pieces.

After the super-saturated firepower was covered, the devils who did not have any hiding place were all killed in almost a dozen seconds, and some of the devils estimated that they hurriedly lay on the ground at the beginning, but it was useless, under this indiscriminate blow, no place was safe.

The defenders didn't even want to throw grenades, they were wasted. All it takes is a burst of fire and a platoon of guns, and the problem will be solved.

More than 300 lives were gone in an instant, and the follow-up troops of the devils outside the Zhonghua Gate were still desperately attacking, trying to provide personnel and firepower assistance to the intrusive troops in front.

Including the three battalions that blocked the attack and the devils who attacked under the city, they didn't expect that the three hundred devils who broke through the city wall would be killed in an instant.

Since there was still some height in the collapse of the city wall, the devils outside the city wall naturally did not know that all the vanguard troops who had broken through were dead, and they were still desperately charging towards the gap in the city wall.

The machine guns of the big potatoes continued to fire continuously, and the barrels of the guns were about to turn red, and they didn't have time to change them, so they picked up the kettle and poured water on it, and the seven companies of the three dogs kept throwing grenades at the gap in the city wall.

Xiucai was accompanied by two or three apprentices, constantly handing Xiucai the rifle with the bullet pressed, and Xiucai was like shooting a moving target quickly in the previous training.

Constantly firing and loading, firing and loading, the right hand is like a butterfly, flying up and down at the bolt, and the devil in the charge keeps dying under Xiucai's gun.

Xiucai didn't have time to see if it had hit, whether it had been killed, and he didn't have the time and mind to calculate how many had been killed, but he just aimed and fired quickly; The other good shooters are similar.

Despite such a blow, the devil still came like a crazy ant, as if he couldn't finish fighting, and the anxious three dogs shouted: "Explosives bag, hurry, get the explosives bag." ”

Originally, the defenders of the city, where would they prepare any explosives bags for blasting, but Sangou still asked Qilian to prepare a lot, and at first he didn't think about how to use it, just thinking, this thing must be useful, prepare first, it's better than nothing.

Sangou called the radish in charge of explosives, and brought several explosive bags, needless to say, he naturally knew what Sangou meant.

The radish that was about to become an "explosives expert" took Zhu Mingtai and Yang Chengzu to the place designated by Sangou and prepared to carry out explosives strikes.