On the fifth watch, before dawn, the camp of the Cangyun Army was already busy, most of the ammunition boxes were unloaded from the car, and the Cangyun Army except for a hundred people left to guard the 80,000 taels of silver, the others all went into battle.

The mortars were moved to the hill where they had checked the situation yesterday, and Ouyang Fei was in charge of it alone, and the others were all with the big force.

Eight mortars were lined up, and next to each gun were two boxes of shells, one box was 16 rounds, and there were more than a dozen boxes in the back, which were guarded by logistics personnel, who would resist the shells at any time if necessary.

At the same time, the large forces of the Cangyun Army and the gunners were also ready at a position three miles away from Yanmen Pass.

They had already agreed with Ouyang Fei that as long as they heard his long whistle, they would follow the set plan and march towards Yanmen Pass, and when they arrived in front of the Yanmen Pass wall, they would line up one mile away from the wall.

Yanmen Pass as a Xiongguan through the ages, since ancient times are easy to defend and difficult to attack, both sides of the north and south are blocked by the wall, the location of the wall is higher, the attacker is basically in a state of attacking from the back, and the defender is condescending.

The largest defensive stronghold on the Yanmen Pass is located outside the Iron Wrap Gate on the top of Gouzhu Mountain, which is named after the black-brown color of the stone gorge, and is an artificially dug pass.

The top of the pass is wide, the lower part is narrow, the situation is dangerous, the barrier is strict, the east and west are about seven zhang wide, the north and south are about half a mile long, the top of the gate of the city is engraved with the three words of Yanmen Pass, the south gate is the door of natural danger, and the north gate is the door of the geographical advantage.

A wooden gatehouse is erected on the Tianwei Gate, called "Yanlou", and the beacon tower in the north of Yanmen Pass is far away.

Therefore, if you want to break through the Yanmen Pass, you must attack from the Tianwei Gate or the Dili Gate, but the special funnel-shaped terrain outside the two gates makes it inevitable that once the army enters this half-mile-long road, it will inevitably be attacked by three sides.

In addition to the attacks on the towers in front, the troops in the passes below can also be attacked on the left and right walls.

To put it bluntly, the road in front of the Yanmen Pass, it is an alley, an alley that is wide at the beginning and narrower the closer you get to the city gate.

It can be imagined that once a large number of people rush in from the wide alley, they will be crowded further and further, and in the end they may be so crowded that they will not even be able to move, and can only stand and be beaten inside.

Under normal circumstances, if you want to break through this pass, you must at least have dozens of times the soldiers and horses of the defenders, and they will attack day and night, taking people's lives to fill in, exhausting the defenders alive, and exhausting the defenders' materials for defending the city, so that it is possible to break through.

Otherwise, this Xiongguan, which is even more difficult to conquer than the Tiger Prison Pass, Tongguan Pass, and Hangu Pass, will not be able to be broken by anyone at all.

So if you want to attack Yanmen Pass, the first thing you have to do is to destroy all the defenders on the city wall near Tianwei Gate, as well as the weapons defending the city.

If it was the original Cangyun Army, not to mention 5,000, 50,000 people would not have that possibility, but now, it is very different, the different place is there, the voice of the people of this era listened, and the cliff looked confused.

"All attention, target, the stone artillery position of the Wolf Tooth Army, the ruler is twenty-six, the benchmark is fired towards, the northeast is two thousand six, one cannon and one shot, ready to ......"

With Ouyang Fei's command, the gunners twisted the mortar direction machine wheel and adjusted the direction of the mortar muzzle and the high and low elevation angles.

In the end, the gunner of the leftmost of the eight guns took a shell and put it in the muzzle, and Ouyang Fei raised the binoculars and looked at the direction of the stone artillery position.

Although he couldn't look directly at the location, he still knew the general direction, and he only needed to look at the location of the fire and smoke to roughly know where the shells would land.

"A good shot. ”

"Put. ”

The gunner of the first gun on the left let go of his grip on the shell and turned his head away.

"Tom"

"Huh"

"Boom"

Ouyang Fei clearly saw the position where the fire light was rising, and immediately continued: "All pay attention, the direction is corrected, zero zero three to the left, the upper and lower orders are repaired and added two, all ten shots are shot urgently, prepare to ......"

"A good shot. ”

"The second artillery is good. ”

"Three guns are good. ”

“......”

"Eight guns are good. ”

"Put. ”

"Tom ......"

"Woo Woo ......"

"Boom Boom Boom Boom ......"

"Tom ......"

"Woo Woo ......"

"Boom Boom Boom Boom ......"

The first shot is just a test of ballistics, and it doesn't have to hit the target, of course, the first hit is naturally best, so the first round usually only has one cannon fired.

After the artillery commander knows and corrects the bearing, he can go all out.

There are three types of mortars, namely: rapid fire, salvo fire, and equal rapid fire.

After adjusting the bearing, you don't care about anything, according to the number specified by the gun commander, you can shoot one shell after another, and it is usually used to destroy the designated target.

A salvo is naturally all the artillery fired at once, and after the first cannon is fired, one shell is taken, and after hearing the command of the artillery commander, they let go together, so that a covering bombardment can be formed, which is usually used to destroy the enemy's living forces in an area.

Equal rapid-fire means firing from one cannon to eight guns, with the same interval of time, firing in turn, if the password is "one shot per second, release", then after the first cannon is fired, the second cannon is fired at an interval of one second, and the third cannon is fired at an interval of one second, and so on.

The function of rapid fire is to form a continuous artillery bombardment, so that the opponent is tired and does not know which direction to dodge, causing confusion to the enemy.

At the end of the first round of bombardment, each cannon smashed ten shells and ejected them, a total of eighty shells, and Ouyang Fei believed that the stone artillery position of the wolf's tooth was already a pile of broken wood.

"All attention, target enemy camp, direction correction, one cannon and two guns, zero zero five to the left, three to the top and bottom single repairs, three guns and four guns, zero zero six to the left, upper and lower single repairs, plus three...... Salvo ready ,......"

With Ouyang Fei's command, the gunners quickly adjusted the mortar Zhu Yuan.

"A good shot. ”

"The second artillery is good. ”

“......”

"Put. ”

"Tom"

"Boom ......"

"Put. ”

"Tom"

"Boom ......"

This time, Ouyang Fei fired fifteen rounds of salvos in one go, and only one hundred and twenty shells did not stop.

Don't worry about uncorrected shells falling into the same spot, the chances of two shells falling into the same crater are lower than the odds of winning the first prize in the lottery, so those large craters are usually the best natural bunkers on the battlefield.

This is because in the process of firing the artillery, the recoil will make the mortar itself have a slight vibration, but don't underestimate this slightest vibration, as the so-called difference is a millimeter, a thousand miles.

Of course, the mortar is not so exaggerated, but after each shot, the landing point of the next shot will definitely change slightly, which avoids the shells falling in the same position and wasting shells.

Stone artillery positions and barracks had been bombarded, and now it was the turn of the city walls.

"All attention, target, the city wall on the bed crossbow, direction correction, one cannon and two cannons, to the right zero zero seven, the upper and lower single repair minus five, three cannons and four cannons, to the right zero zero five, up and down single repair, minus five ......"

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