(Thanks to AD5432 for the tip!)

The bed crossbow is to install one or several large bows on the bed frame, twist the wheel axle behind the bow to load the arrows, and use the combined force of several bows to fire arrows to cause damage to the enemy. The bed crossbow is characterized by great power and long range, which can hit the enemy at a distance of 300 to 400 paces and about 500 to 600 meters, but the shooting accuracy is not enough, and a large-scale salvo is generally used, which can cause very great lethality to the densely arranged enemy formations.

In the era of cold weapons, the bed crossbow was the most lethal and longest-range weapon, but it was complex to make and expensive to maintain, so the production was limited, and it was inconvenient to move, making it unsuitable for field warfare. However, in the prosperous Tang Dynasty, the rich flow, the imperial court was not short of money at all, and this kind of weapon with a lot of money and great lethality was produced in large quantities. Tongguan Chengguan has a total of 20 crossbows, arranged at the east gate and the south gate, 10 crossbows at each gate, and the rebels are about to arrive, so they will first greet them with this powerful weapon.

Seeing the rebels entering the range of the bed crossbow, Li Fu ordered the sergeant to start shooting, and Pang Zhong at the other city gate also ordered the bed crossbow to start attacking first. Following the orders of the two generals, several sergeants who operated the bed crossbow stretched their crossbows with force, and with a sound of "release", dozens of thick crossbow arrows flew out from the crossbow and shot straight into the rebel array far away.

Seeing the crossbow arrows shot from the top of the city, the rebels under the city also reacted immediately.

Of course, the rebel generals also knew that the Tang army on the city pass would strike at them first with bed crossbows, and many of them had already died under the huge lethality of bed crossbows, and after arriving at the city of Hantong Pass, almost entering the range of bed crossbows, the leading Zhonglang general also immediately ordered the sergeants to disperse, so as not to kill more sergeants by bed crossbows.

However, whether it is Hantong Pass City or Sui Tong Pass City, the terrain outside the city is relatively narrow, there is not much room for detours, and when the dense sergeants march quickly, it is impossible to disperse quickly, and they don't know when the arrows of the Tang army will be shot, and they only urgently order the sergeants to dodge after seeing the arrows shot by the bed crossbow. But this time it was too late, no matter how fast the man and horse moved, they could not compare to the speed of the crossbow arrow flying in the sky and falling in the momentum, and in the blink of an eye, the long arrow fell into the array of the rebels in a panic.

"Ah......" A rebel sergeant who was a little late in his movements, and did not judge where the crossbow arrow was about to land, was shot in the middle by a galloping crossbow arrow, and the long crossbow arrow entered his abdomen, penetrating the entire abdominal cavity, passing through the body, a large amount of blood gushed out from the wounds in both directions of the body, instantly staining half of his body, and the ground under him, and he couldn't live. Through the sergeant's long arrow, it pierced into the leg of another sergeant beside him, and the sergeant screamed miserably, and then fell down with the sergeant in front of him who was dead, and several sergeants who were dodging in a panic trampled on him mercilessly, and continuous screams followed.

Another sergeant, who had not yet dismounted, was shot in the leg with a flying crossbow arrow, but the long arrow, which maintained great momentum, did not stop, but continued to move forward, through the sergeant's leg, into the horse's belly, piercing deeply. The horse immediately fell to the ground wounded, and the sergeant was thrown to the ground, and his head was crushed tightly.

The sergeant, who was not killed by the crossbow arrow, died under the weight of his own horse.

The arrows of the bed crossbow are very huge, and if the length unit of the future life is calculated, it should be between one meter and one meter five, or even longer, and the body and arrow are several times thicker than ordinary arrows, and they come with huge speed kinetic energy, and the sergeant who is shot can only consider himself unlucky.

As the arrows fell, a continuous scream rang out in the rebel array, and the sergeants who had been pierced through their bodies almost died as the arrows passed through, and some of the unfortunate horses were shot by the arrows fired by the thick bed crossbows, and they could not escape the fate of immediate death. Some arrows even penetrate the body of a person or a horse, and then shoot into another person or horse, killing all the people who shoot or causing huge damage.

After some crossbow arrows are shot, they are far away, and even shoot to the nearby rocks, carrying huge kinetic energy of the arrows, and even directly crack some mountain rocks and plunge into the stones.

"Speed up and spread out! As long as we attack the city of Tongguan, the arrows of the Tang army will not be able to help us!" The lieutenant general who commanded the outpost waved the sword in his hand and shouted at the panicked sergeants beside him.

He has led the army to attack the city of Tongguan several times, and has also seen the lethality of the bed crossbow, there is not much way to dodge, so he can only force the sergeants to disperse, continue to advance, prepare to gather the advantage of many people, force to the city of Tongguan, and return fire with arrows!

As long as you can form a confrontation with the defenders at the head of the city, the situation can slowly change. If you can't advance at such a distance, the huge lethality of the bed crossbow alone is enough to terrify the sergeant, and even cause the sergeant to be disheartened, and the sergeant will flee in defeat.

Fortunately, the number of bed crossbows is limited, and the number of crossbow arrows shot at a time is not much, so if you look at it, you can still avoid it!

Under the orders of these lieutenant generals, the rebels bent on their waists, lying on the bed crossbow arrows that flew over from time to time, and quickly moved towards the city of Hantong Pass. However, there were still unlucky sergeants who were shot by the bed crossbow and fell far away from the remaining walls of the Hantong Pass, unable to get up again.

The lethality caused by the bed crossbow and the reaction of the rebels fell in the eyes of Li Fu and Pang Zhong, who were watching the battle at the head of the city, and they also knew that it was impossible to inflict a very big blow on the rebels by relying on the bed crossbow alone, and there would definitely be more rebels attacking under the city wall, and then it would depend on how the archers shot, and it would not be able to cause great damage to the rebels.

There are a total of 20 bed crossbows at the head of the Hantong Pass, each of which can shoot eight to twelve arrows at a time, which means that a salvo can only shoot a maximum of 200 arrows, while a salvo of 2,000 sergeants is 2,000 arrows.

The bed crossbow can be said to be a long-range strike weapon, which has a more psychological deterrent effect, and can make the opponent's soldiers feel cold, and even give birth to cowardice, and have a sense of fear when attacking.

The bed crossbow continued to fire, but more and more rebel sergeants dodged the blow of the bed crossbow and approached the city of Tongguan.

"Archer, get ready to shoot!"

At the east gate and south gate, Li Fu and Pang Zhong gave orders almost at the same time.