The shape of the first type of helmet is already somewhat like a modern German helmet, and Lu Bu also hopes that it can be used as a field dinner pot and a small bench, which is truly multi-purpose.

The first helmet began to use steel as the main material for the shell, with a head-shaped lining inside, and was produced using metal molds, which were significantly faster than the original helmet, as well as smooth, flat morning reading.

After two waves of grenades, the two sides finally collided together, and the Central Army began to use ramming tactics, and the Cao army that was pushing could not advance, and even began to retreat a little.

Zhang Liao ordered Huang Zhong's Rongyi Brigade to join the attack, and Lejin, who could have relied on the numerical advantage to confront the Central Army, suddenly doubled the pressure and couldn't parry.

The attack of more than 10,000 Central Army rolled forward like a tidal wave, and soon, the hoplites in the first row of Cao's army were killed and wounded, and they could only be topped by the second platoon.

However, the crossbowmen sandwiched in the middle were immediately taken care of by the Central Army, and while the two rows of hoplites were rotated, they fiercely shot the crossbowmen in the middle.

Lejin could only let the spearmen in the back row step forward and replace the crossbowmen.

Guo Jia exchanged views with Cao Cao, and felt that it would be worth the loss if he continued to fight, so he ordered Mingjin to withdraw his troops.

After Le Jin commanded the hoplites, the spearmen and the few remaining crossbowmen withdrew first, only to be intercepted and fired by mortars who had already rested, and suffered heavy casualties.

The presence of mortars completely changed the rules of engagement between infantry and infantry, and even retreat became not simple.

In the end, Cao's attack cost 10,000 casualties and ended in failure, but it also caused nearly 3,000 casualties to the Central Army, and the losses were also not small.

Guo Jia suggested that Cao Cao turn south and recover Xinye, Wanxian is eager to go down, and it is good to have Xinye to protect Xiangyang.

Land supply can also be carried out from the direction of Tongbai Mountain, and there is also an unobstructed water supply supply.

Cao Cao agreed to Guo Jia's suggestion, but he was still not worried about Cao Ang, so he asked Xiahou Yuan to send more scouts to find Cao Ang.

Ordered Cao Zhang's cavalry to open the way and turn in the direction of Xinye.

Xiahou Yuan, Cao Ren and others led the infantry to join Cai Mao's Jingzhou army to cover the retreat of the army to the south.

The Central Army and Jingzhou in the three directions saw that Cao's army began to retreat and took the initiative to attack.

A large number of cavalry also appeared in the direction of Cao Cao's withdrawal, but fortunately, the cavalry of Cao Zhang's Cao army was also well-trained, and it could fight with the cavalry of the Central Army for a few rounds.

However, the cavalry of the Central Army still carried out the tactics of hitting and running, just rushing up and shooting a few rounds of crossbow arrows, turning around and running, and did not fight hard with the cavalry of the Cao Army.

After pursuing and harassing like this for thirty miles, the Central Army Ming Jin withdrew his troops.

Cao Cao and Guo Jia counted the whole army, and the Cao army suffered a total of 15,000 casualties, and the Jingzhou army suffered more than 10,000 casualties.

Fortunately, by the time Cao's army arrived in Xinye, the central army had already abandoned Xinye, leaving behind an empty city and a gate that would have time to be repaired in the future.

Most of the residents of Xinye had already dragged their families with Liu Bei when they went south. The rest of the people also ran out during these battles between the Cao army and the central army.

The scale of Xinye's city is not large, and the county seat cannot accommodate all the Cao army.

Cao Cao was worried about Cao Ang's safety, so he lived in the military camp outside the city, and Guo Jia also stayed in the camp outside the city with him.

Only Cao Hong, who was unwell, lived in the county government in the city, and 5,000 Cao troops were also stationed in the city, and everyone else was stationed in the camp outside the city.

Guo Jia was in Cao Cao's big tent, thinking about the map of Jingzhou constantly, and from time to time there were bursts of coughing sounds.

Cao Cao asked him with concern, "Fengxiao, did you delay taking medicine again on this expedition?" Let Lang Zhong, who is with the army, give you a few pairs of medicine! ”

"Don't drink in the future, drinking too much will hurt your body!"

"Lord, I'm fine, I'll let Lang Zhong decoct the medicine, I'm still young, just raise it." But the eldest prince has no news at this time, which is really worrying! ”

There were 5,000 Cao army infantry stationed in Xinye Castle, and after a day's battle and non-stop hurrying, at night, the soldiers were already tired and fell asleep except for a few who were on duty at night and patrolling.

Even these Cao Jun, who are on duty at night and patrolling, are also looking for a place to be lazy! There are tens of thousands of troops of your own side outside the city, so there is no need to worry about enemy attacks!

At the time of the third watch, some dark shadows appeared in several houses in the city, and finally there were as many as four or five hundred people.

After a brief rendezvous, they began to explore the four city gates, warehouses, and important places such as the county office.

Among them, there were twenty or thirty people who touched the county office, and they lightly killed the sentry at the door who was dozing off and entered the courtyard.

They scattered and stood guard at the door of several rooms, all of which were filled with the sound of snoring soundly.

Four black shadows came to the courtyard of the backyard, which was originally the bedroom where the county lord lived, skillfully killed the guards at the door, and gently put down the corpse.

I heard one person lower his voice and said: "Regiment commander, this move of the military advisor is ruthless enough, I don't know who lives here, if it is Cao Cao, then we will make a lot of money." ”

"Well, don't worry, although the appearance of this guard won't be Cao Cao, but the official who can live here can't be small."

After a while, about the time was up, several people rushed into the courtyard, opened the bedroom door, threw a string-pulling grenade directly on the bed, and then hid behind the wall.

I just heard a voice from the room, "Who's outside?" Someone"

Before he finished speaking, there was a boom, and the roof and walls shook.

The county master's house is quite sturdy, and the grenades have not collapsed.

Several people rushed into the house, and before the smoke had dispersed, they saw that the bed had been blown up, and a burly man was lying in a pool of blood, looking at them with wide eyes.

A man in black took two steps forward and raised his knife to stab down.

The burly man exclaimed, "Who are you?" Even if you kill me Cao Hong, you have to make me a ghost! ”

When the man in black heard this, the falling knife slowed down, "You are Cao Hong?" It's a pity, it's not Cao Cao, who am I when you ask? Lao Tzu is the head of the Special Operations Division of the Central Army! ”

After that, the horizontal knife was sent, and Cao Hong's life was killed.

In fact, just after this grenade sounded, the explosion of grenades was also heard in other courtyards of the county government.

Then there was the sound of grenade explosions in all directions of Shinno Castle, and the louder sound of explosives exploding.

Wen Ping killed Cao Hong, went to the courtyard again, splashed the bags of fire oil he had carried with him on the room and the roof, and then lit the house with a lantern at the door.

They quickly took off the black clothes on their bodies, and they were wearing Cao Jun's military uniform, but there was an eye-catching white silk scarf around their necks.

They threw their black clothes into the fire, and lit fires everywhere as they walked out.