Fu Yan's eyes also fell on the forbidden ditch in front of Tongguan, the Jin army did not send many people, only about three thousand people, but for the narrow area in front of Tongguan, three thousand people is not too little. However, Fu Yan also noticed that the Jin army not only sent infantry to attack the city, but also in the array of infantry, dozens of catapults could be seen.

Obviously, the Jin army tried to use catapults to bombard the walls of Tongguan, and this tactical play was not unexpected by Fu Yan, but if the Jin army's catapults were advanced under the city of Tongguan, it would pose a great threat to the walls of Tongguan.

The catapults used by the Jin army were large catapults, each of which was equipped with dozens of riders, and this kind of catapult could throw stones weighing more than 50 catties, and the damage to the city wall was quite serious.

The Jin army erected a pontoon bridge over the forbidden water, and dozens of catapult riders pushed a trebuchet across the river, which seemed quite difficult, and it took a lot of effort to carry the heavy catapult across the forbidden water.

The forbidden ditch to the city of Tongguan is a relatively flat road, Zhang Shang led the army to advance slowly step by step, approaching the city of Tongguan, but he did not dare to get too close to the city, but from the city one hundred and fifty steps away from the formation of the formation, in the front row, it is a shield soldier holding a giant shield, countless shields are densely lined up in a row, forming a thick shield wall, and the catapult is placed behind the shield wall.

This large catapult can shoot up to 300 paces, but the best distance is within 150 paces to achieve the desired attack effect, and the stones thrown at this distance can effectively destroy the enemy's walls. One hundred and fifty paces is a very dangerous area, not only can the opponent's catapult hit, but the strongest two-stone longbow can also cover this distance, not to mention the bed crossbow with a maximum range of three or four hundred paces.

In order to effectively protect the catapults from being destroyed by the enemy, Zhang Shang laid a thick shield wall in front of the catapult array.

On the head of the city of Tongguan, except for a few fluttering flags, there is no figure to be seen, the speed of the Jin army's advance is not fast, it stands to reason that the Shu army will have enough time to deploy, and even interfere with the Jin army's deployment under the city, but to Zhang Shang's surprise, the Shu army not only did not move, but there was no trace on the city, which could not help but make Zhang Shang wonder.

However, Zhang Shangke didn't think that there would be no one in the city of Tongguan, but what kind of medicine was sold in the gourd of the Shu army, Zhang Shang couldn't figure it out. Since the Shu army has no action, Zhang Shang will not stop his deployment speed, as long as the catapult is in place, it can launch an attack, even if the city wall of Tongguan is cast of copper and iron, under the bombardment of the boulder, it will collapse, Zhang Shang seems to have seen the light of victory.

The shield array in front of them was quickly arranged, and the catapult was in place, and the loader of the catapult began to carry stones to the throwing arm of the catapult, and the gunners also pulled up the ropes, and the launch was ready.

On the top of the city wall, Fu Yan had been silently following the actions of the Jin army, and there was not the slightest expression on his cold face. The Jin army invested all the catapults in the first wave of attacks, which is a bad thing and a good thing, if it is attacked by the catapults, then it will be a bad thing, but the Jin army transferred so many catapults at the same time, which created an opportunity for the Shu army to concentrate on annihilation.

So Fu Tong has been standing still, he is waiting for the trebuchet to enter the effective range, this effective range is necessary for the Jin army, only to reach this position can it be possible to destroy the city wall of Tongguan, similarly, this position is also necessary for the Shu army, only when the trebuchet arrives here, it is possible to destroy them.

Under Fu Yan's strict orders, the Shu army defending the city was all hidden, and there was no situation on the city wall at all from the outside of the city wall, but Fu Yan was secretly preparing the means of counterattack, preparing to destroy these catapults that posed a huge threat to the city wall in one fell swoop.

The most effective weapon to destroy these catapults is the catapults, as long as they are hit by the catapult's stone projectiles, the enemy catapults will instantly turn into a pile of rotten wood. Fu Tong has some catapults on hand, but the biggest problem is the problem of shooting accuracy, the catapults of this era basically use the pulling type of catapults, small catapults need five or six people to pull, medium ones need more than a dozen people, and large ones often need fifty or sixty people to pull to complete a projectile.

The Jin army used a large catapult to attack the city, and the Shu army naturally did not need to be so big to defend the city, after all, the place on the city wall was small, and it was impossible to put such a big thing, and the Shu army's catapult was mainly small and medium-sized, but if it was used to deal with the enemy's catapult, the destruction of the small catapult was enough.

The Jin army attacked the city with catapults, and there was no need to consider the problem of accuracy at all, as long as it could hit the city wall, it would be successful. But the Shu army is different, and it is not an easy task to destroy these catapults one hundred and fifty steps away. Although the catapult of the Jin army looked huge, at a distance of one hundred and fifty paces, it was difficult to hit such a target 100%. Because the pulling catapult uses manpower to pull, it is difficult to achieve the balance of manpower, the accuracy of the projectile is always an unsolvable problem, the projection with an error of less than five feet can be achieved, it is already a very high accuracy rate, some stone projectiles are projected, the error can reach one or two zhang, and it is completely impossible to use the catapult PK catapult.

Fu Yi also knew that this method would not work, but he had another clever plan, the catapult could not work, so he decided to use a repeater cart with a longer range, greater power and more accurate shooting accuracy. The penetrating and destructive power of the crossbow arrows is also quite amazing, but it is not enough to deal with the catapults made of thick wooden poles, and Fu Tong has another idea, he wraps strips of cloth around the shafts of the crossbow arrows, stains them with badger oil, and makes them into fire crossbow arrows.

However, before the fire bolt attacked, Fu Yan decided to use the catapult to deal with the Jin army's shield array. The shield arrays are densely arranged, and there is no need to think about the impact of the catapult when attacking, just throw stone bullets at the shield array. The shield array has an advantage in defending against arrows, but in the face of whistling stone bullets, no matter how thick the shield is, it is difficult to resist.

The Jin army under the city has completed the formation, and the catapult is already making final preparations, Fu Yan saw that the time was ripe, and immediately calmly ordered: "Attack!" (To be continued.) )