As the saying goes, you have a good plan, and I have a wall ladder.

Xu had thought about what countermeasures Cao Jun had taken when he thought of using siege crossbows against the heavily armored cavalry, and this kind of shield chariot was definitely within their consideration.

As soon as the shield cart entered the Cao army's military fortress, it was blocked, and the dug pit and antlers completely blocked the path of the shield cart.

Wang Xuan scolded and decisively asked people to withdraw, and he didn't believe it, do you really think that Lao Tzu has no tricks for you!

For five consecutive days, Wang Xuan did not attack again until the sixth day......

A series of small stone-throwing trucks were pushed up under the escort of the heavy infantry, Xiahoudun watched from a distance, his brows couldn't help frowning, he didn't think that Wang Xuan would think that just relying on small stone-throwing trucks could break through their well-designed military fortress, but he didn't think that Wang Xuan would do useless work.

Indeed, the real killer move is not the so-called small catapults, but the stoneware pots that are pushed up.

The clay pot has a small mouth and is stuffed with a cotton cloth, but because the jar is so right, you can still smell a pungent smell.

There is a way that water and fire are ruthless, Wang Xuan doesn't believe it, if he goes down with fire, how can Cao Jun resist.

As for oil, it is a coincidence, there is exactly this thing in Shuzhong, and oil was once produced when well salt was mined, and some time ago Wang Xuan happened to see it when he looked at the bamboo slips that were discarded by the family.

In fact, oil has been used for a long time, more than 1000 BC, ancient Egypt, ancient Babylon, ancient India, etc. have begun to collect natural asphalt for construction, corrosion, bonding, decoration, and medicine.

The "Book of Han" written by Bangu of the Eastern Han Dynasty in China also recorded: "Gao Nu has water that can be burned. ”

Therefore, in the past few days, he arranged for someone to get a lot of crude oil, and in order to further improve the power of self-made combustion, Wang Xuan also carried out a rough refining.

Petroleum crude oil does not have a fixed boiling point, and the component parts of the crude oil are separated by heating the crude oil to make it have different boiling points, which is the most primitive crude refining method.

Even so, gasoline, diesel, kerosene, and asphalt can be separated.

For Wang Xuan, gasoline, kerosene, and so on, are almost the same now, all he wants is to burn the enemy camp.

It's just to separate the diesel from the asphalt, which is not ignited at room temperature......

Ignite the soaked cotton cloth on the clay pot, place the stoneware pot in the pocket of the small counterweight catapult, and give the order, "Put!" ”

The lit clay pot roared towards the Cao army's position, and Xiahoudun saw the burning lead on the clay pot at a glance, but he couldn't understand what this thing was for a while?

There are too few flames!

Just thinking about it, the clay pot slammed into the ground, and all kinds of gasoline and kerosene inside burst out, and suddenly, a huge fireball burst out, and within a radius of dozens of meters, it suddenly became purgatory, the fire was surging, and the heat wave was surging.

Dozens of small catapults, don't look at this thing is small, but the technical content is not low at all, plus the clay pot itself is also light, the range can reach five or six hundred meters, this time, a quarter of the Cao army formation has entered the covered area, frantically throwing, not giving Cao Jun a chance to react at all, the front part of the fortress was completely covered by flames.

Xiahoudun gritted his teeth as he watched, and wanted to rush up and smash those catapults several times, but the reckless man standing at the front of the array with a double halberd could immediately make him come to his senses again.

It's not that our army is too incompetent, but there is a Gundam in the place!

Listening to the screams coming from the area covered by the sea of fire in front of him, Xiahoudun sighed, fortunately, the screams only lasted for a short while, and those who didn't run out were all burned to death, except for the smell of burning, only the sky-high fire and thick black smoke were left in the eyes, of course, that burst of heat wave was inevitable.

It is impossible for Xiahoudun to be restrained, as the old saying goes, the water comes to cover the earth, and the fire comes to extinguish the water!

As long as it is not food that is burned, it is not so terrible in the eyes of Xiahoudun, and the military advisors Xin Ping and Xin Bi who accompanied the army were called, and the two of them were obviously prepared, and they immediately started casting spells when they arrived here, and after a while, everything was so smooth, the clouds came, the rain fell, and the two of them were also very tired, and they were a little out of breath after completion, but this did not delay the two of them to be proud.

When this kind of military fortress was first designed, Yuan Shao's subordinates who supported the coffin to the south did not make a small contribution, and at this moment, looking at the results of their efforts, watching Wang Xuan being continuously resisted and unable to enter, this kind of spiritual satisfaction made the two extremely proud, satisfied, and gratified, accompanied by the pleasure generated after the revenge, the two of them had a smile on the corner of their mouths,). (。

……

……

Xiahoudun looked at the two of them from time to time, and the pleasure after the revenge on the faces of Xin Ping and Xin Bi brothers gradually solidified, and slowly turned into frowns, the hands that were stuck in their waists were involuntarily lowered, their fists were clenched, large drops of sweat appeared on the door of their heads, and their expressions gradually became perverted......

"Why hasn't this fire been extinguished?" Xiahoudun couldn't help it, stared at the two and asked.

Xin Ping, Xin Bi: You ask me, who do I ask, how do I know!

Well, the two of them can only say this kind of thing in their hearts, and they are also confused, and they are half-loud and suffocated, "There are clouds in the Book of Changes, there is fire in Ze, and there is fire in the upper and lower Ze......"

"What the hell I'm asking you is how you put out a fire! Why don't you talk to me! Xiahoudun's face suddenly became very hideous, and he grabbed Xin Ping's neck and shouted.

"Yuan let the general calm down, Yuan let the general calm down!" Seeing that his brother's face was starting to turn purple, Xin Bi hurriedly hugged Xiahoudun's arm and shouted loudly.

Xiahoudun eased up at this time, and put down his hand hatefully, seeing that he was really pushed forward by Wang Xuan in this way, he was really a little anxious, and he was a little out of proportion at this time, but ...... Who cares about that, it's just a lost dog who escaped from Yuan Shao's side, he is Cao Cao's brother, and he doesn't care about the two of them at all.

The brothers of the Xin family glanced at each other, and could only sigh secretly, it is impossible to hold grudges, after all, although they are both surnamed Xin, the two are not Simba after all, and there is no life for the protagonist.

Seeing that Wang Xuanjun's artillery fire was extending forward little by little, and there was no room for further fighting here, Xiahoudun stomped his foot fiercely, "Withdraw the army!" ”

Seeing that Xiahoudun had withdrawn his troops, Wang Xuan breathed a sigh of relief, fortunately this fool was fooled, otherwise, this battle would not have ended so easily.

In the final analysis, the amount of gasoline bombs needed for this kind of covering attack is staggering, and within the end, Wang Xuan obviously does not have so much production in his hands, and what he has just thrown out is already all the inventory during this time.

However, whatever he is, if he wins, he wins.