Eighty zhang is more than enough distance for a ballista, and these top shooters can aim with a ballista as easily as they do with a repeater.

The ignited detonator was tied to the large crossbow arrow, and it was shot accurately above the shaft, and the deafening explosion sound kept coming.

These top marksmen lived up to expectations, and in a short time they blew up ten wells, and the bed crossbows on the other wells tried to fight back, but they couldn't do anything, and they couldn't find the murderer from the hundreds of ballistae in the city.

Yuan Shao and Cao Cao were also helpless against this sudden change, and they tried their best to imitate the stirrups and crossbows, but they still haven't gotten the formula for this gunpowder.

Yes, they already know about the existence of gunpowder, detonators, and no longer believe in any "thunderous fury".

They sent batches of spies to obtain the formula for gunpowder, but the Central Army also listed gunpowder as the number one secret.

The gunpowder laboratories and gunpowder workshops were the strictest means of secrecy, and the secret bases where the laboratories and workshops were located were guarded by a special unit of the 1st Guard Division.

All officers and soldiers must be Han Chinese, and they must be from Yunzhong, all of them are the children of Lu Bu's hometown, and those who have been in the military for more than three years have been examined by Li Su at all levels.

All the staff were not allowed to have contact with the outside world, and Lu Bu gave them the highest remuneration and the best treatment for their families, in exchange for keeping them secret.

The final formula was only in the hands of Lu Bu, Ma Jun, Guan Laotie, and Guan Hu, and the workers who made the gunpowder were all slaves of Xianbei and the Xiongnu, and some of them would be cleaned up from time to time.

So the secret of gunpowder has been kept very well!

The princes of the Kwantung Coalition could only watch as the forty wells were blown into powder one by one by the explosives of the Central Army.

Now that it was no longer hidden, the detonator was strapped to the crossbow bolt and shot at the rushing and ladder cars.

As a result, this continuous rumbling explosion became a drum beat to boost the morale of all units of the Central Army, and also became a death knell to hit the morale of the Kwantung Coalition Army!

The emergence of gunpowder completely broke the balanced offensive and defensive trend of the cold weapon era.

When a stone projectile with a detonator in the middle was dropped by a trebuchet on the Kwantung coalition forces and a thunderbolt, when the stone projectile fragments exploded in the air took the lives of the surrounding soldiers at high speed.

When the detonator exploded near the Thunderbolt, destroying the wooden structure and scrapping the Thunderbolt cars, Cao Cao, Yuan Shao and other leaders of the Kwantung Coalition were completely desperate.

When Lu Bu completely opened the Pandora's box of gunpowder, the result of the collision of different levels of scientific and technological civilization was inevitably a fiasco for the more backward and primitive side!

The Kwantung coalition army sounded the bleak clarion call for withdrawal and sounded the golden plate for the withdrawal of troops.

The thousands of warriors of the Kwantung Coalition who had already attacked the city could only retreat helplessly, and many fell on the way to retreat with great indignation.

Ladders, rushing cars, and thunderbolts were abandoned in large numbers, along with tens of thousands of corpses of loyal and brave Kwantung coalition troops and the dying and seriously wounded.

The defenders of the Central Army at the head of the city, whether they were the main force or local troops, or the officers and men of the navy, all broke out into loud cheers.

This cheer is full of complex emotions, not only from the heart of excitement and joy, but also from the aftermath of the catastrophe to the rest of the life, but also for the sad nostalgia for the dead comrades-in-arms and brothers!

Many of the generals around Lu Bu, including Gao Shun and Zhang Liao, were also jubilant, cheering, and as excited as the soldiers around them!

Only Lu Bu was full of complicated emotions and was not as excited as everyone else.

He felt that his massive use of gunpowder had greatly changed the course of history, more so than any of his previous changes.

He could no longer predict what history would turn out to be.

Could it be that in this era, the age of gunpowder was entered early? Have you started the era of hot weapons?

Forget it, at such a happy moment, it's better not to think about such a headache, no matter what, what has already happened, what's the use of regretting?

At the very least, the use of gunpowder can reduce the number of deaths in its central army and end the war as soon as possible, isn't this also very meaningful?

The Kwantung coalition army withdrew its troops and returned to the camp, and all the princes except the Qingzhou army suffered heavy losses, and Yuan Shao and Cao Cao, who invested the most troops, naturally suffered the largest losses.

Yuan Shao's Jizhou army suffered nearly 20,000 casualties in today's battle, and Cao Cao's Yanzhou army also suffered nearly 15,000 casualties.

Yuan Shu also suffered 15,000 casualties, the least Sun Ce also had nearly 10,000 casualties, Liu Bei and the Jingzhou army also suffered more than 10,000 casualties, and the entire coalition army together suffered 100,000 casualties in one day.

Of course, they also inflicted unprecedented losses on the defenders of Tiger Pass, with nearly 50,000 casualties among various units of the Central Army, almost as much as the previous war of attrition combined.

However, for the Central Army, the best news is that the miracle doctors Zhang Zhongjing and Hua Tuo have come to the Tiger Prison Pass camp, and many of the seriously wounded of the Central Army can be treated in time.

Hua Tuo, as the most powerful surgeon in the world, naturally would not be let go by Lu Bu, and did everything possible to invite him to the Chang'an Imperial Court, mainly to teach apprentices at the Central Medical College, and trained many doctors and doctors together with Zhang Zhongjing.

This time, in the battle of Tiger Prison Pass, he was naturally invited to the front-line hospital to treat the wounded, so that many wounded people saved their lives, and even saved their hands and feet.

Following Zhang Zhongjing's strong advice, Lü Bu personally sent a letter to all the princes of the Kwantung Coalition Army, allowing unarmed personnel from both sides to enter the battlefield in front of the Tiger Prison Pass and collect the bodies of the dead officers and soldiers on both sides.

The main thing is to avoid the decay and deterioration of the corpse in hot weather, the occurrence of plague.

In fact, this exposure to corpses and spawning plagues is the last trick Jia Xu formulated for Lu Bu, a nirvana technique that will hurt both sides, but fortunately there is no need to use this trick.

Lu Bu really admired Jia Xu for being able to think of using biochemical means, it was really the right time and place to do everything!

After this battle, the Kwantung Coalition Army no longer took the initiative to attack Tiger Pass, but did not withdraw its troops.

They also pinned their hopes on the battle of the grasslands in the north, if the Xianbei people could win, it would be equivalent to cutting off Lu Bu's right-hand man, and maybe it would bring a new turnaround!

Of course, Lu Bu would not take the initiative to go out of the pass to attack the Kwantung coalition army, although the other side was defeated, but still had a numerical advantage.

Since then, the two sides have once again formed a stalemate at Tiger Pass, and both have turned their attention to the northern grasslands.

At this time, it had entered the end of June, and the Xianbei coalition army, which had been struggling for a long time, finally moved south from the city of Dangdang.

The nomadic camps of the Han army along the way all took the initiative to give up and never fought with the army of the Xianbei people.

The route chosen by Kebineng and Budugen this time is not exactly the same as the southbound route ten years ago, but they have the same destination, and they will eventually enter the Hetao area from Yunzhong and Dingxiang.