Soon, stone bullets fell on the head of the Tiger Pass, and the Central Army began to suffer a large number of casualties.

However, the trebuchets of the Central Army are all on the inner city wall, and they are basically out of the range of the Thunderbolt, so they are still very safe.

The two trebuchets of the Central Army also add up to ninety, so the strength of the two sides is equal.

However, the counterweight stone throwing machine of the Central Army began to be replaced with 60 catties of stone bullets, and it could also be easily thrown 200 zhang.

And the power of sixty pounds of stone bullets will be much greater, no matter how brave the hoplites are, the big shield will not be able to stop the fall of sixty pounds of stone bullets, and the thunderbolt will be crushed to pieces as long as one hits.

When the Qingzhou army attacked the city today, it took the initiative to choose the southernmost city wall, which was the side close to the mountain range.

This is also what Lu Bu informed them to make them choose this way, but the specific reason is not stated.

Because today is the siege of the city by the princes of the Seven Roads, and they are all next to each other.

The previous cheating methods no longer apply, and the Central Army's defending troops have been replaced with normal arrows, no longer headless arrows.

All they could do was to try not to target the Qingzhou soldiers, and dropped the trebuchets and ballistae of this section of the city wall to other areas of the city wall, leaving only a few pretenses.

The soldiers of the Qingzhou Army charged with two layers of chain armor, and used shields to protect the head, throat, chest and abdomen and other vital parts.

The attention of Cao Cao, Yuan Shao and others was focused on the main attack direction in the middle, so how could they have time to pay attention to them.

The range of the Thunderbolt was already in the calculations of the Central Army, and the area of 200 zhang from the city wall had already been marked by the trebuchet in the city.

Therefore, although the accuracy rate of the Central Army is obviously much higher, and it is outside the range of the opponent, it does not have to consider its own safety at all, and can play its full strength.

Cao Cao and the others were also very anxious when they saw this, and the thunderbolt car could not even suppress the opponent's trebuchet, let alone change to heavier stone bullets and bombard the city wall, and thirty catties did not pose the slightest threat to the city wall.

It seems that the thunderbolt must continue to move forward, at least to be able to threaten the opponent's trebuchet, the trebuchet behind the city wall cannot be hit, and the trebuchet on the city wall can still be done, as long as it moves forward another twenty zhang.

Tian Feng also said, "Let's let Jing Yan appear, it's also good to disperse the firepower of the opponent's trebuchet, and it can also boost the morale of our army!" ”

Everyone nodded in agreement, and the forty wells began to enter the battlefield and move towards the city walls.

Each well is divided into four layers, except for the bottom layer is used to accommodate the soldiers who push the well forward, the second and third layers have shooting holes, from which bows and crossbows can be fired, and on the top layer, a large bed crossbow is installed, although it cannot be fired continuously, but the range and power are not inferior to the Central Army's continuous ballista.

Forty tall and mighty wells joined the siege procession, and sure enough, the morale of the trebuchets was low because they were inferior to the central army.

The Central Army's trebuchets were mainly used to suppress the thunderbolts of the Kwantung Coalition Army, and the appearance of Jing Qi forced Lü Bu to use only twenty trebuchets to attack Jing Qi.

The hit rate of trebuchets in this era is really low, and the well is constantly moving, and the number of twenty trebuchets is not much, so the effect of the blow can be imagined.

The reduction of the trebuchets that suppressed the Thunderbolts made the Thunderbolts active again, and they could threaten the trebuchets on the inner walls by advancing to a distance of 180 zhang from the city walls.

They brought great casualties to the defenders at the head of the city again, and Lu Bu had no choice but to use strategic reserves, and two red signal flares rose into the sky of the Tiger Prison, although they could not see clearly during the day, but the sound was still very loud.

In a few moments, five three-story boats bypassed the water pass of the Tiger Prison Pass and appeared on the south bank of the Yellow River.

The closest to the northern section of the city wall was Yuan Shu's besieging army, they were attacking the city wall, the ladder had been erected at the head of the city, and on their side there were two wells and five thunderbolts to cooperate with the siege.

Suddenly a moving building appeared in their field of vision, and they were all surprised, most of the soldiers of the Kwantung Coalition Army had never seen a building ship, and the size of the building ship exceeded their knowledge of the ship.

I am afraid that only a few Jingzhou troops and Yangzhou troops have seen the building ships in their own naval army.

The volume of the building ship is even more behemoth compared to the well.

The five building ships were lined up as close to the south shore as possible, and all the trebuchets were replaced with thirty pounds of stone shells, bombarding the Kwantung coalition forces with their maximum range.

Some of Yuan Shu's subordinates still wanted to command the infantry to attack the ship, but before they could get closer, they were mercilessly shot down by the ballistae and repeaters on the decks of each floor.

The addition of fifty trebuchets, especially the counterweight trebuchet with a maximum range of 400 zhang, dealt a great blow to Yuan Shu's army.

The well and trebuchet were quickly crushed by the Central Army's naval divisions that were shooting at them, and soon only the hoplites who were attacking the city with arrows were left within this section of the wall.

It is impossible for the trebuchet of the navy army to smash the ladder, so wouldn't it be smashed along with the city wall?

In this way, the pressure on the southern section of the wall was greatly reduced, and trebuchets and ballistas could be used on other walls.

Lu Bu also saw the attack pattern of the navy trebuchet, and attacked with fire, making him slap his thigh fiercely.

Why did you forget to attack with fire?

After the tactical adjustment, the trebuchets of the Central Army no longer attacked in a scattered manner, but attacked with concentrated fire, and the hit rate was indeed much higher.

However, by this time, the entire attack had been launched, and most of the two hundred ladders and forty ladder trucks had successfully reached the wall.

Thousands of Kwantung coalition forces began to climb upward, and many of the coalition generals climbed to the top of the city and fought fiercely against the defenders.

The defenders of Tiger Prison also came up with various methods to strengthen the defense, rolling wood and stones, pouring hot oil and other means.

Both stone slings were carried up to the top of the city, and were used to deal with the rushing carts.

In such a large-scale fierce battle, the casualties on both sides are very huge, and each other has already been killed.

The well was already close to the distance of eighty zhang from the city wall, and there were still more than thirty of the forty wells, and the soldiers on the well began to shoot crossbows and crossbows with the opponents at the head of the city.

The effect of these wells on the head of the city was more pronounced than that of the thunderbolts, and the defenders had to dodge the attacks of the thunderbolts and watch out for the crossbow arrows fired from above.

The central army lost a lot of troops in this section of the city wall in the center, and a battalion of several hundred people was replenished, and it was basically wiped out in a while.

The Kwantung Coalition Army really put a lot of effort into building these siege weapons, and created so many of them in one go, so that Lu Bu's troops were also stretched.

Many sections of the city wall had climbed up to the infantry of the Kwantung Coalition, and they began to destroy the winch wooden frame at the head of the castle and the frame of the Yaksha Raksha.

Lu Bu looked at those tall wells, gritted his teeth, and said to Gao Shun: "Use the Lianzhu ballista to fire the detonator, replace it with a short fuse, and replace the ballista shooters with special marksmen, shoot the wells accurately, blow them all up for me, and don't care about anything else!" ”

Gao Shun received the order to make arrangements, and soon arranged ten special marksmen, each of whom operated a ballista and began to attack the well with precision.