The caliber of this kind of aircraft gun is smaller, about 25 by eye, the shell of the aircraft gun is much smaller than the "shell" in my impression, and the bullet of the heavy machine gun is much larger, in the middle of the two, the front end of the shell has a color mark, I don't know what it means, I only know that this is a "cannon" and not a gun, in the classification of modern weapons, the difference between a gun and a gun, not only the caliber, but more importantly, the gun is a live bullet, emphasizing the longitudinal cutting power, and the shell is another charge in the warhead, emphasizing the explosive power.

Therefore, no matter how small the caliber of this cannon is, it can also explode, but unfortunately, the distance is far, and there is yellow fog, I can't see the explosion effect, I can only see a few flashes in the fog, however, this wave of attacks, but successfully blocked the momentum of the opponent's attack, according to Jiang Jun, the enemy should be setting up catapults, ready to cover the fire, but we waited for a long time, and there was nothing to throw into the city.

But the enemy did not retreat, and his breath remained in place, probably analyzing and judging my attack just now.

"Did you run away?" Jiang Jun asked, he didn't have a phase qi technique, and was about to send cavalry out to reconnoitre.

"No, they didn't run, they didn't move, then we don't have to move," I said, "Bingbing, take this opportunity, you go and teach everyone how to use weapons, how to aim, how to shoot, we have limited ammunition, and when we start fighting, we will shoot a single shot, shoot at important targets, don't seek total annihilation, just force the enemy back."

The enemy hasn't reached the range of the rifle yet, so there's no need to worry, it would be great if I could push the enemy back with this big guy in my hand.

However, I still think of the enemy superficially.

I felt a little uncomfortable in the gun position, and I was about to ask the Yin soldiers to find me a chair, Jiang Jun suddenly shouted, pressed my head, and stuffed me under the feet of the two Yin soldiers, and took off my hat!

In two seconds, a loud bang came from the left-hand side!

I turned my head and looked through the gap between the legs of the Yin soldiers, only to see that about ten meters away on the left, the battlements of the city wall had been blasted open a big gap, and the few Yin soldiers who were originally standing there guarding were gone, and the other Yin soldiers defending the city were suddenly chaotic and began to find a place to hide.

"Get out of the way!" I pulled away Jiang Jun's arm to protect me, what kind of thing is the other party, it is so powerful, it is useless to hide behind the wall battlement!

Looking up at the outside of the city, this time I saw that in the yellow mist, there were five huge and tall wooden shelves, and a large pendulum fell under the shelf, a bit like the kind of "kowtow machine" used to extract oil, which should be a catapult.

"What did they just throw, why didn't I hear it?" I asked Zheng Bingbing, who had just run back with a cat.

"It's a big rock!" Bingbing gestured with his hand, the diameter was more than one meter, and it was normal for him to be so powerful.

"Be careful, sir!" Jiang Jun reminded again.

This time, I saw the No. 2 trebuchet on the left, the weight was falling rapidly, the projectile rod was raised, and a black thing was thrown over, and the shape was not too regular, it could be a stone quarried from the nearest mountain.

This time, the trebuchet didn't shoot on our side, and the trajectory clearly went to the left...

I stared at the parabola crossed by the stone bullet, and bang, it smashed on the battlements again, but the Yin soldiers over there avoided left and right because they were prepared, and no one was hit, and after smashing a gap, the stone bullet rolled along the road on the head of the city to the other side and fell into the city.

There was no explosion.

Immediately afterwards, the trebuchets on the opposite side began to fire stone bullets one after another, and I immediately ordered that everyone on the battlements should immediately take the modern weapons that Zheng Bingbing had just distributed, and hide in the nearby buildings under the city gate tower to avoid the stone bullet attack, because the enemy's five catapults, the target of the attack is very clear, that is, the battlements, they fixed their positions, lined up, and obviously calculated the trajectory.

A few Yin soldiers helped me carry the cannon and entered the city gate tower, the battlement is equivalent to seven floors, we hid on the sixth floor, there is a window, I observed through the window, behind the five trebuchets, five more came out, as the second echelon, slightly advanced a few dozen meters, and then the same stone projectiles were fired, I thought it was to hit the city, but no, the second wave of trebuchets attacked the wall of the city gate.