In order to let Daniel Zhang and Tian Peng operate the machine gun with peace of mind, Yang Yifei took out two safety ropes and tied them around their waists, and the other end was hung on the hook in the helicopter, so that they did not have to worry about falling down.

The Black Hawk's hatch machine gun is a Minigang M134 rapid-fire machine gun, also known as a miniature Vulcan cannon, with a caliber of 7.62×51 mm.

Its rate of fire is adjustable, and the speed is controlled by adjusting the current of the motor to achieve the purpose of adjusting different rates of fire, with a minimum of 300 rounds per minute and a maximum of 6,000 rounds per minute.

Yang Yifei adjusted it to a state of 600 rounds per minute, and it can fire 10 rounds per second, which is not slow, if you use the fastest rate of fire, the bullets will be used up in a few clicks, which is a waste of ammunition.

The rapid-fire machine gun is a weapon, unless it is fired flat on the ground, then it is very cost-effective to use the highest rate of fire, and it is very cost-effective to shoot from the sky, because it cannot form the effect of a "fire whip".

The mounts of the two machine guns were pushed forward, causing the barrels to protrude through the hatches, which could no longer be closed and could only be flown open.

Daniel Zhang and Tian Peng sat behind the machine gun with a safety rope tied to their bodies, and Yang Yifei also put two boxes of bullets beside them, and Liu Yuxuan was responsible for loading them.

After preparing everything, Yang Yifei and Li Mochou got into the cab, started the system, and flew into the sky and headed east under the eyes of the disciples of the Quanzhen Sect.

It was also the first time to take a plane, and although Quan Zhen Liuzi was also a little nervous, he did not have Daniel Zhang's worries, but more excitement.

Because they are convinced that Yang Yifei is a person among immortals, and their understanding of the existence of immortals is much deeper than that of Daniel Zhang, naturally there is nothing to be afraid of.

Xiaolongnu is purely ignorant and fearless, she doesn't know how to be afraid at all, in her simple thinking, anyway, the senior sister and the senior brother-in-law are there, then it must be safe.

Yang Yi flew very smoothly, rarely appeared in the state of large tilt of the fuselage, even if the turn was a slow turn, although the arc of the turn was much larger, but it could ensure smooth and stable.

So Quanzhen Liuzi quickly relaxed, began to enjoy the high-altitude scenery, and longed for the realm of immortals.

……

In the early morning, when a new day of battle began, five miles away from Tongguan, the school field of the Mongolian army camp, just after the year of its establishment, the majestic and burly Wuliang Hatai rode on a horse and said to Subutai: "Abu, my son has gone." ”

Subutai said in a deep voice: "The Jurchens are almost unable to hold on, I hope that today, you can bring me good news." ”

Without saying anything, Uliang Hatai slammed his fist-clenched right hand on his left chest, then turned his horse's head and rushed to the front of the 5,000-strong army, drew his scimitar and raised it high, shouting, "Warriors, go on the march." ”

The Uliang Hatai Department was the vanguard, only a small number of guards were cavalry, and the rest were all infantry, because the cavalry was useless because of the siege of the city.

Subutai will lead the main army as the rear army for its suppression, the main army is mostly composed of cavalry, when the city pass is breached, that is, they ride their horses vertically and horizontally, and start killing.

Tongguan is located in Qin, Jin, Henan three provinces to rush the place, the terrain is very dangerous, there is Qinling in the south, there is the forbidden valley in the southeast, and there are twelve cities in the south of the valley.

There are Wei and Luo Erchuan in the north and the Yellow River hugs down the pass, the west is close to Huayue, the surrounding mountains are even mountains, the peaks are even peaks, the valleys are deep and the precipices are absolute, the mountains are high and the roads are narrow, the middle passes a narrow sheep intestine path, only allows a car and a horse to go back and forth, it is easy to defend and difficult to attack to the extreme.

Tongguan guards the passage of the Central Plains to Guanzhong and the Western Regions, the strategic location is extremely important, and it has always been a place for soldiers to fight, known as the reputation of "the throat of the four towns, one hundred and two passes".

One hundred and two double pass means that as long as two people guard, you can resist the attack of 100 people, although this is just an exaggerated description, just like a husband when the pass, ten thousand people do not open, but it is enough to see the danger of its terrain.

Since the Tang Dynasty, this pass has been renovated, and a walled fortress has been built on the pass, although the pass has been widened, but it has become more difficult to overcome.

In the past, when there was only one narrow pass, although it was impossible to march in large numbers, it was also inconvenient for the defending side to arrange defense.

The Jin Tartars were only 3,000 people, but they withstood the attack of 20,000 Mongolian troops, relying on this ancient Xiongguan.

But after all, the gap in numbers is too big, and the Mongolian army can take turns to attack non-stop and calmly replenish ordnance and materials, but they only have consumption and have no time to replenish.

At that time, the two armies had been fighting for more than half a month, and the pass was full of broken spears and broken spears, blood and bones, which showed the tragedy of the war.

To this day, less than half of the Jin Tartar defenders remained, and everyone was exhausted, and the stones and boiling oil arrows used to defend the city had been exhausted, and they could only rely on the slight advantage of condescending to defeat the Mongolian army again and again.

But Wan Yan Heda, the general of the Jin State, looked at the soldiers who were holding swords and guns and leaning against the wall and sleeping, and knew very well in his heart that if the reinforcements did not arrive today, it would only be a matter of time before the pass was broken.

The hour is approaching, the Mongolian army came as promised, because they can get enough rest, at this time they are all energetic, murderous, ironclad, and the army is extremely strong.

The soldiers of the Jin Kingdom were woken up by the generals one after another, dragging their tired bodies, their red eyes open, and they got up and clenched their blades.

Wanyan Heda sighed, now that the Mongolian army has tackled the fortification, there is no need to even return the cannon, because there is no need.

The basic routine of the Mongol army's attack was to first set up a return cannon and fire stone bullets at the city pass to suppress the guards and make them dare not show their heads, and then the soldiers carrying the ladder would take the opportunity to quickly approach the city pass, put the ladder on the wall, and attach the ants.

Since the archers were suppressed by the return artillery, when the infantry rushed to the city pass, they could reduce many casualties, but Uliang Hatai knew very well that the opponent had long run out of arrows, so naturally there was no need to suppress them, and they just went up and started working.

The battle soon began, the Mongolian soldiers carried the ladder, swaggered to the city pass, the scimitar bit with the mouth, set up the ladder and climbed up.

The golden soldiers could only hug a log together, shouting and desperately turning the top of the ladder down, but the effect was minimal, after the ladder overturned, the Mongolian soldiers who climbed to the top fell and broke their tendons, but there were not many injuries, and then the ladder would be carried back.

After attacking and defending in this way, the strength of the Jin soldiers was greatly reduced, and they could no longer resist the ladder, so they had to stand by the ladder in groups, and stabbed the Mongolian soldiers who climbed up with their spears.

The Meng sergeant was not afraid of death, put the Mengtie shield on his head with one hand, grabbed the ladder with the other, and climbed up desperately with a scimitar in his mouth.

The first few people resisted the assassination of the Jin soldiers with their bodies, forcibly pounced on the city wall, regardless of their own injuries, and frantically held the scimitar to slash and kill, the first one climbed up, and there was a second, and soon the city was full of Mongolian soldiers.

Wanyan Heda held a long-handled machete and led a group of guards to slash wildly, but there were more and more Mongolian soldiers and soldiers in the city, and he had no choice but to order a retreat.

Seeing that there was no longer a single golden soldier to be seen on the city pass, Wuliang Hatai finally showed a happy smile on his face, summoned a herald, and ordered him to go to the rear to report the speed, and the Tongguan had been breached.

The herald took the order, and after a short time, the gate of Tongguan was wide open, and the Mongolian soldiers poured into the pass like a tide, and Wuliang Hatai pulled out his scimitar and shouted: "The whole army is assaulting." ”

"Kill ......"

The shouting of killing shook the sky, but it covered up some other strange sounds, and when the Mongolian army rushed into Tongguan and opened the killing ring, everyone didn't notice that above the sky, a black shadow came from the west.