"Change the oil and throw it away!"

With Pang Tong's cold voice, the second batch of jars was also thrown on top of the city gate. Unlike the first batch, this time the jar was filled not with gunpowder, but with oil.

In the Eastern Han Dynasty, vegetable oil was generally rapeseed oil in addition to soybean oil. It can be used for combustion and edible. Since Jiaozhou and Nanzhong were relatively peaceful, the tung oil produced locally began to be gradually known to the people in the south. Although it is not edible, it is good to use it to light lamps and make oiled paper and oilcloth. When it comes to attacking or defending the city on the battlefield, this tung oil will replace the previous edible vegetable oil and become the cheapest choice, saving some vegetable oil for the soldiers to stir-fry and eat.

Hulala and dozens of tung oil canisters were thrown onto the wall of the Tiger Prison, this time there was no explosion, Cao Ren just breathed a sigh of relief, but saw that all the canisters that smashed into the city were shattered, and a liquid with a unique smell suddenly flowed out.

"What is this?" Cao Ren is a northerner, and he has never seen tung oil, so he suddenly didn't know why he smelled this strange smell. If it had been replaced with vegetable oil or soybean oil, or if the enemy army under the city had prepared rockets, Cao Ren would have reacted a long time ago and taken relative countermeasures. Now, it's time to react a little, and this slight reaction suddenly made him pay a heavy price.

"Ignite the fire and keep throwing!" Under Pang's unified order, the third batch of altar thunder was thrown into the tiger prison. This time, the explosion of the altar thunder immediately ignited the tung oil that had been sprinkled everywhere before, and the entire city head of the Tiger Prison was suddenly plunged into a sea of fire!

"General be careful!" Although it was an instant fire, the guards around Cao Ren still fulfilled their duties as soon as possible, and hurriedly escorted him to a place where there was no fire. "I'm fine, quick, put out the fire, quick!" Cao Ren ignored the pressure of the fire, and hurriedly commanded loudly. In fact, at this point, the fire is still under control, and it would not be good if it was allowed to continue burning. Cao Fu on the side listened to this, and hurriedly organized people to prepare sand and water to prepare for extinguishing the fire.

It's a pity that Pang Tong didn't give him this opportunity, and after this time, it was the tung oil jar that was thrown over the city. This tung oil is extremely flammable, Cao Fu organized people to extinguish the fire, how could it be too late? Seeing this, Cao Ren immediately understood that it was unrealistic to extinguish the fire now. Hurriedly stopped drinking at the moment, and asked Cao Fu to lead people to avoid it for the time being, and wait for the fire to stop. After all, under such a fire, it is unrealistic for the enemy army to want to attack the city. If you are in a hurry to extinguish the fire, it is tantamount to letting the soldiers joke with their lives. He just ordered people to extinguish it with sand from a distance, and at the same time climbed high to check the movement of the enemy army.

"Give it to me!" Pang Tong ordered that while continuing to throw fire oil, he ordered more than 2,000 elite soldiers who had already carried ladders, rushing cars and other siege equipment to carry the ladders and advance rapidly while the enemy could not show their heads. Then they didn't run long before they were surprised to find that many of their colleagues were holding jars in their hands and going up with them.

"Bump!" On the battlefield, they didn't care about being surprised, but they still chose to be loyal to their duties, pushing the cart and rushing towards the established gate. The chariots were generally used to ram and destroy the city walls, and they were made of sharp rough wood, with wheels installed underneath, and the top was covered with an iron roof to reduce the damage of soldiers from arrows and rolling wood and stones on the city head.

"General, the enemy is coming!" The soldier in charge of observing the enemy situation in the high place hurriedly shouted. Cao Ren looked at the fire on the head of the city and saw that it was still very fierce, and it was really unrealistic to attack the enemy army by relying on it. Liu Bei is so rich that he can't keep burning like this. As for taking the opportunity to destroy the city wall, Cao Ren was very confident, in such a short period of time, it was impossible to make too much damage to the wall of the Tiger Prison that he had reinforced. With this in mind, Cao Ren also pressed his surname and waited for the fire to weaken.

"Boom! Rumble! Several sounds rang out one after another, and eight rushing cars crashed into eight holes in the wall of Tiger Prison Pass. One foot square, the depth is about the same. This damage was nothing compared to the entire sturdy city wall. But this time it was weird, I only hit the car once or twice, and I was about to hit it again. The comrades who had stepped forward with them had stopped them, and then piled the jar in their hands in the small hole that had just been knocked out.

"Retreat!" Pang Tong, who had been paying close attention to the situation here, saw such a scene, and hurriedly ordered all the people who were attacking the city to retreat. Only a few people took out the fire folds, lit the fuse on the altar, and then fled back quickly.

"Shi Yuan, do you want to rely on the power of this gunpowder to blow up the wall of this tiger prison in one fell swoop?" Seeing this, Liu Bei somewhat understood. Pang Tong nodded, looking at the rapidly burning lead by the city wall, Pang Tong's hand couldn't help but clench tighter.

The power of gunpowder, Pang Tong has been deeply shocked since he saw it for the first time. He often sighed that if he knew the recipe for this thing, he would have blown up the tiger prison long ago. How did he know that Zhao Feng was suffering from the limited amount of fire and nitrate, and he had made such a little over the years. As a last resort, Pang Tong had no choice but to save some money. First blow up the defenders at the head of the city to deter them, then set fire to prevent them from further action, and then send people to crash out of the small nest on the wall with a rushing car, so as to deploy explosives to blow up the city wall and try to blow it up in one fell swoop.

"I hope it will be a success!" Pang Tong muttered in his mouth. More than 200 jars of thunder fired at the same time in the caves carved under the city walls, this power should be enough! If he can blow up the city wall in one fell swoop and not ask for it to collapse, then he will be more than half successful.

"Bang!"

"Bang!"

"Bang!"

A loud bang rang out one after another, and the power of this time was not a little stronger than the previous one. Under the continuous bombardment of more than 200 altar mines, the solid tiger prison wall also seemed to begin to tremble. Zhang Liao, Zhang Fei and others in the distance were covering their ears and bearing the loud noise. And when the tiger prison was closed, the defenders led by Cao Ren made loud noises in their ears, and their feet swayed, as if they were in hell.

Finally, when all the gunpowder was blown up, and after the smoke cleared, Liu Bei was pleased to find that a crack about two zhang wide had also exploded on the strong city wall. Through the smoke that had not yet dissipated, Liu Bei had vaguely seen behind the wall.

"Third brother, hurry up!" Keenly catching the fighter, Liu Bei hurriedly ordered. However, someone was faster than him, and before Zhang Fei, Zhang Liao had already taken the lead and led people to rush forward. After Zhang Fei received Liu Bei's order, he also hurriedly led people to rush forward. Before Cao Ren ordered the city wall to be repaired, he fought through the narrow crack into the pass, and then managed to open the city gate and enlarge the army into the pass.

"Rush!" Zhang Liao and his 800 personal soldiers rushed to the front. These 800 people are Zhang Liao's personal guards, following him from the state to this point, brave and good at fighting not inferior to Guan Yu's 500 school swordsmen, this full impact, stepping on the blasted gravel under his feet, taking advantage of the fact that Cao's army did not have time to organize effective resistance, a few people in a row from the crack to kill.

"Uncle, the enemy has come in!" Cao Ren and the others, who were shaking dizzily at the head of the city, had just stabilized their footsteps when they saw that a big crack had appeared under their feet. After the smoke cleared, nearly a thousand people had already entered the Tiger Prison along the cracks, fighting with the defenders who had not yet had time to fully react. Especially Zhang Liao and Zhang Fei's team, they are about to reach the city gate. Seeing this situation, Cao Fu, who had little experience, suddenly shouted in a hurry and stomped his feet again and again.

"Quick, organize the troops, drive them out, be quick!" Seeing this, Cao Ren was already shocked into a cold sweat. If you can't drive the other party out of the pass, you will start a scuffle like this, and your own strength is not enough to stuff people's teeth.

"Wen Yuan, hurry up and open the city gate and let the eldest brother's army come in!" Swinging a spear to stab one of Cao Jun's Dubos to death, and turning around to cut another in two, Zhang Fei also shouted loudly to Zhang Liao, who rushed in earlier than him.

"I know!" Zhang Liao yelled and stabbed the two to death, and now he and Zhang Fei were just leading a thousand people to rush into the pass, and the defenders who reacted had already led people to block the coming Liu Bei's army on the left side of that crack, and at the same time wanted to exterminate their more than 1,000 people. No matter how confident Zhang Fei is, he doesn't expect his own person to win the Tiger Prison.

Therefore, at this time, Zhang Liao and Zhang Fei led people to rush and kill, and at the same time went to the door to kill. Now it's up to who can hold on, if Zhang Liao and Zhang Fei can't hold it and are opened to the city gate, then Cao Ren will lose today; If Zhang Fei and Zhang Liao can't open the city gate, then they will be trapped and killed in the city.

"Quick, move the rocks away!" When they reached the city gate, the two found that the gate had already been blocked by Cao Ren with stones. At that moment, Zhang Liao and Zhang Fei personally led the team to fight with the swarming Cao army, and dozens of others removed the stones piled up at the door as quickly as possible. At this time, Liu Bei, who was anxious, saw that the gate could not be opened for half a day, so he hurriedly led the army to escort it, and ordered someone to hit the door in a hurry.

"Kill!" Led by Zhang Fei and Zhang Liao, these thousands of people rushed desperately to buy time for their colleagues who opened the city gate. The city gate was already narrow, and Cao Jun couldn't open it for a while. Cao Ren had already personally descended to command, but the speed was still extremely slow.

"Shoot them all, archers!" Seeing that there were fewer and fewer stones, Cao Ren hurriedly ordered. A team of archers hurriedly stepped forward and fired arrows at Cao Jun and Liu Jun who were fighting in the field. In the rush of the battle, not many people on either side carried shields, so in a series of screams, the current hundreds of people were already lying on the ground, and there were people on both sides.

"Uncle, and my own people!" Cao Fu was stunned when he saw this, Cao Ren pursed his lips and was silent, but his heart was bright, if he didn't control the situation now, it wouldn't work.

"Wenyuan, be quick!" Zhang Fei saw that Cao Ren had already begun to prepare to shoot the second round of arrows, and he was almost so anxious that he screamed on the spot. Zhang Liao pursed his lips and was silent, but he still ordered someone to quickly remove the stones.

An arrow "swished" and hit the back of a soldier who was moving stones. The busy figure suddenly froze, but still threw a stone in his hand aside, and then fell down and died.

"Hit me!" Liu Bei, who was outside the gate, was separated by the city gate, and when he heard the shouts of killing inside, it seemed that every moment was as long as a year. Beside him, there were already soldiers pushing the cart and slamming it against the city gate.

"Crunch! Crunch! "As there were fewer and fewer stones blocking the gates, the walls became louder and louder with each impact. Finally, after dozens of hits, with a bang, the half of the city gate on the left fell backwards.

"Kill!" Liu Bei saw the city gate falling, and immediately jumped up excitedly. Don't let him call anymore, the rest of the soldiers, led by Chen Dao, Gao Ran and others, hurriedly went to the city to kill. Seeing this, Zhang Fei and Zhang Liao behind the city gate suddenly felt a burst of joy in their hearts. If it weren't for the fierce battle, I would almost cry with joy. Although there were only five or six hundred of the more than 1,000 people who rushed in with him, although Zhang Fei himself was also hit by two arrows, Zhang Liao was even stabbed in the left shoulder by Cao Ren. But now that the army has rushed in, the sacrifice is clearly worth it.

"It's not good, retreat into the inner city and continue to defend it!" Seeing this, Cao Ren's heart suddenly sank. Although he was unwilling, reason told him that it was really unrealistic for the current Cao Jun to expel the other party from the city, so he could only retreat into the inner city and then defend it. But what Cao Ren didn't expect was that his plan could not be realized.

"Cao Renxiu go!" It was Zhang Fei who took the lead and killed him like a chopping wave. Cao Ren was shocked, and hurriedly ordered his subordinates to go forward to intercept it, while he was preparing to go to the inner city and organize an effective defense. At this moment, Cao Ren suddenly felt a huge danger coming towards him.

Almost relying on instinct, Cao Ren hurriedly dodged to the right, but after all, it was a step too late. A swift arrow pierced through his armor and pierced his right shoulder.

"Ahh Cao Ren, who was screaming, looked at the place where the arrow came from, but saw that a veteran had just put down the longbow in his hand. Seeing the surrounding Cao soldiers being killed and cut to the ground one by one, feeling the sharp pain in his shoulder, a tragic thought suddenly rose in Cao Ren's heart.

"Looks like I'm going to die here today, and it's too late to retreat back to the inner city. The tiger prison is dangerous, I lost it on the first day, what face do I have to go to see the lord again? But Mengde, don't worry, I am your brother, and I will never surrender. Cao Ren, who understood this, gritted his teeth and grabbed the arrow on his shoulder, and pulled it out with all his might.

"Come with me!" Bandaged hastily, Cao Ren roared angrily, and then led his people to quickly withdraw from the battlefield. On the other side, Liu Bei looked at Huang Zhong and Wen Ping, who were hurrying in front of him, and he was also overjoyed.

"Hansheng, Zhongye, fortunately you arrived in time, otherwise, I'm afraid it will be difficult to take this tiger prison so easily!" Liu Bei, who was in a good mood, also smiled and said. Of course, there is an element of politeness in these words, although Huang Zhong and they led the rear army to kill in time, and the wishful thinking of letting Cao Ren withdraw into the inner city under the attack failed, but even without them, Liu Bei's front army was enough to control the situation, at most it was only a few twists and turns. Liu Bei wanted to praise him like this, but the two hurriedly said they didn't dare.

At this time, more and more Liu troops were killed in the city, and Cao's army had gradually fallen behind. Zhang Fei took the lead and led people to the inner city to kill. Just when they were about to break through, a group of elite men, led by Cao Ren, who had just bandaged his wounds, suddenly came out of the inner city, almost without regard for his own life, desperately fighting with Zhang Fei's people, and Liu Jun, who was caught off guard for a while, retreated. Zhang Fei was furious, but he could only shout and fight, stabilize his footsteps and make the next step.

(To be continued)