In fact, after three days of fierce fighting, Xiao Tianjian didn't just want to consume these surrendered soldiers, these surrendered soldiers fought for three days was actually just a feint, and the real attack opened the city, Xiao Tianjian didn't expect these guys to do miraculous feats at all, but used them to cover the true purpose of the Xingtian Army.

During these three days, under the cover of the soldiers, the engineer battalion of the Xingtian Army used various tools to fill in a lot of river sections on the moat that had run out of water, and pushed some cave carts to the foot of the city wall, and a large number of sappers hid under the cave carts and began to dig the wall, first hollowing out the foot of the city wall, and then stripping off the city bricks, and began to dig the heel of the city wall, digging out a lot of holes under the city wall, and digging towards the city in turn.

To deal with such a strong city, in the case of a relatively sufficient defender and the will to resist in the city, it is not easy to attack the city wall by ordinary siege methods, and Xiao Tianjian also knows the weakness of his soldiers, they are stronger than field battles, strong in having strict military discipline, and can cooperate with each other, but their personal technical combat ability is limited, and the siege fire soldiers can only provide firepower suppression under the city, and the casualties will definitely be quite large, and it is not a pity for him to die some soldiers, but a large number of losses He has a regular Xingtian army on hand, But it wasn't what he wanted.

Some people proposed to concentrate all kinds of artillery, bombard a section of the city wall, and bombard the city wall into the city, but after understanding the structure and thickness of the city wall of Kaifeng City, Xiao Tianjian finally did not adopt this suggestion, because the city wall of Kaifeng City is too strong, and the city wall is a few zhang thick, and it is basically unimaginable to use these artillery of theirs to bombard it now. The bombardment can only collapse the city wall of Kaifeng in the year of the monkey, so the bombardment can only deal with some cities where the city walls are not too strong, and it is obviously not suitable for dealing with Kaifeng.

So he adopted the suggestion of the commander of the engineer battalion to drill the gopher, and dug holes on all sides of Kaifeng City, and finally chose one place to blast it, blow up a section of the city wall, and then attack the city.

This is also the reason why he sent his troops to attack Kaifeng for three days in a row, and after three days, under their cover, the progress of the engineer battalion was relatively smooth, and several caves had been excavated in the east and west of the city, and they were gradually digging deeper.

It was only at this time that the defenders of the city could basically no longer threaten the sappers working under the city, so Xiao Tianjian let go of the disabled officers and soldiers.

After the troops were withdrawn, the fifth battalion of the left side took over and began to continue the siege, but at this point, the entire siege was already an obvious battle, and the defenders on the city wall had begun to feel that something was wrong at this time.

So Gao Mingheng immediately ordered the demolition of the houses near the city wall in the city, and cleared out a large open space, just in these open spaces in the city, sent people to dig out a deep trench, in his opinion, if the Xingtian army dug a hole into the city, the hole would definitely be dug into these deep trenches, and it happened to fall into their hands, and they could take the opportunity to kill, which was also a good way to deal with digging tunnels and attacking the city.

As everyone knows, Xiao Tianjian never thought of digging a tunnel to enter the city, his fundamental purpose was just to dig a hole in the city wall, carry out fixed-point blasting, and blow up a section of the city wall.

But this kind of thing is easier said than done, the inside of the ancient city wall is all made of Sanhe soil mixed with glutinous rice juice rammed, after years of thorough drying, its hardness is very large, and even almost able to catch up with the hardness of the concrete of later generations, the pickaxe picks up the round planing is to gnaw a small piece, and even sometimes just gouges out a white spot, the excavation is very difficult, if it is not for the Xingtianjun to drill the gopher, a group of excavation masters collected from the miners from all over the world, the average person estimates that they can't gnaw this kind of city wall at all.

In addition, Xiao Tianjian usually gave an order to drill the gopher, that is, let him find a group of masters to think about how to dig the city wall, after all, in addition to the engineer battalion in the front of the battle, in front of the army to open the road and build bridges in the mountains and water, another main job is to play a role in the siege war.

And since Xiao Tianjian established the engineer battalion, the role of the engineer battalion has become increasingly important, in the previous siege wars, there are basically various engineer battalions appeared, in addition to building siege equipment, they are to come up with a better siege method, in this way, it has also accumulated a lot of experience, for this reason many people in the engineer battalion have figured out a lot of methods, so that the craftsmen have made many kinds of tools with stainless steel for them, so that now the engineer battalion in the variety of special tools is very complete, Naturally, there are indispensable tools to deal with the city wall.

Therefore, although the rammed earth inside the city wall was very strong, it could not stop them in front of those who were prepared, and a large number of sappers took turns to drill at the foot of the city wall, and kept digging in shifts, but the speed of progress was also quite fast, and within three days they had dug several deep holes in the east and west walls.

Xiao Tianjian commanded the siege in the north of the city every day, and asked the gopher about the excavation every day, and on the afternoon of the third day of the fourth month, the gopher found Xiao Tianjian and reported: "Qiyu is handsome!" Three large holes have been dug in the east and west walls, and now the inside of these big holes has been dug through, and a large hole has formed inside, which can be dried! ”

Xiao Tianjian was overjoyed when he heard this, and after asking carefully, he said, "That's very good!" If you capture Kaifeng City, your engineer battalion will have the greatest contribution, but you have to remember that we only have this one chance, if we blow it up, we must blow up the city wall, and we must not miss a big event! ”

Xiao Tianjian's prudence is not unreasonable, in history, Li Zicheng also used the method of digging tunnels and blowing up the city wall with gunpowder when he opened the city in Sanwei, but because of the inaccurate calculation, the city wall was not blown up when it was blasted, nor did it blow up the city wall, but because the explosion mouth exploded outside the city, but many of the righteous soldiers waiting outside the city became victims of the explosion, killing and injuring a large number of righteous soldiers on the spot.

Therefore, Xiao Tianjian was worried that this time the bombing of the city would eventually lead to such a situation, so he repeatedly told him to be cautious, so as to succeed and not fail.

The drill gopher nodded and said, "Don't worry, Dashuai!" If you put in a thousand catties of gunpowder and block the opening outside, you can blow up the city wall, even if it is the worst, you can blow up a big hole under the city, and the generals will attack the city, please believe in the judgment of the last general! The last general will dare to guarantee his head! ”

Xiao Tianjian was relieved at this time, patted him twice on the shoulder of the gopher and said with a smile: "If you can have such confidence, I will be relieved, as for you to use the head as a guarantee, I don't think there is any need, your head is still more useful on your shoulder!" Let's go! Tomorrow I will go into the city to meet the high name Heng in the city and the king of Zhou! ”

(Chapter 7 arrives, today's update task is completed, is it cool to update at such a speed?) Everyone must be cool, but I'm not happy! Hehe! Lying in front of the computer, the toilet is not available! However, the word count of these two chapters is a little less, after all, it is too tiring! I can't catch up! Bear with me! ）