Heavy siege equipment is complex in structure and very slow to install. Under Liu Quan's personal urging, it took hundreds of siege technicians two days to install the dozens of trebuchets and bed crossbows. Each of these big guys was operated by a dozen new annex soldiers, and even bulls and horses were used to help pull the torsion device. They fire stones and crossbow arrows that are much larger than light siege weapons, and they are not half as powerful. The stones thrown by a light trebuchet are only the size of a fist, while the stones thrown by a heavy trebuchet are the smallest size of a human head, and the largest one is even the size of a grinding disc. Heavy bed crossbows fire not bolts but spears at all, and even the heaviest shields can be easily pierced, even deep into the walls.

Faced with boulders and spears flying in the wind, the Thunderbolt soldiers guarding the city had to retreat to the third wall. Liu's heavy trebuchets did not have the long range to hit the third wall, and the heavy bed crossbows, although they had a long range, could not shoot at a curved range, and could not hit the Thunderbolt soldiers behind the base of the third wall. The second wall collapsed two gaps in the first round under the impact of hundreds of pounds of stones thrown by the new annex army, and the huge impact force even detonated the mines buried at the base of the city wall. The heavy bed crossbows, though much less damaging to the walls, were much more accurate by trebuchets, destroying all the wooden defenses, including the second gate, after three rounds, and even attaching dozens of spears to the third wall, through which the new annex soldiers could easily climb the walls.

The heavy trebuchet ejection of the new annex lasted a whole day before it stopped. Under the heavy bombardment, most of the first wall had collapsed; The second wall was also smashed into several large gaps. Since then, before the third wall, there has been no obstacle to the new annex attacking the city. It's just that the new annex army did not attack the third city wall in one go, in addition to the continuous high-intensity projectile, the trebuchet's power device is very worn, and it needs to be stopped to replace parts and equipment, and more importantly, the third city wall is more than 200 meters away from the trebuchet, which has exceeded its range limit of 150 meters. At this distance, to reach the third wall, you can only throw fist-sized stones. Liu Cheng wanted to destroy rather than kill, so he ordered the heavy trebuchet position to be pushed forward by a hundred meters, and the bed crossbow to be left unplaced, in order to suppress the Thunderbolt army defending the third wall.

The bed crossbow weighs hundreds of catties, and more than a dozen strong men can carry it forward, just find a flat place to place it again. The heavy trebuchet was extremely bulky, and its structure was not suitable for moving as a whole, so it had to be disassembled and reassembled. While the soldiers of the new annex were adjusting their heavy trebuchets, the Thunderbolts in the city of God's Arm also began to set up artillery positions behind the third wall. In the previous siege battles, most of the siege weapons in the Divine Arm City were damaged by Yu Xing or the warship artillery, and the soldiers of the Thunderbolt Army who defended them were all soldiers of the special battalion, and they would not use the only remaining siege weapons in the Divine Arm City. Muskets and grenades had limited range and power to pose a threat to the siege weapons of the new annexes, and were instead suppressed to death.

The Tiger Squat Cannon that was being laid out behind the third wall had been transported into the Divine Arm City yesterday, but it was not used. Zan Wanshou wanted to show the enemy weakness, try to lure the enemy to attack, and turn Shenjian City into a flesh mill for the Mongolian army. It's just that the power of this heavy trebuchet is really amazing, if you don't use artillery to counteract, you may be destroyed by Liu Cheng and attack the city of the Divine Arm.

Transported into the Divine Arm City were twenty-four medium-sized tiger squat cannons. This type of artillery is only 120 catties, and its firing range is more than a mile, although the shells fired cannot destroy the coarse parts of the trebuchet, but the killing effect on soft targets such as the human body is excellent. Compared with the fortress cannon or the heavy artillery of the warship, the tiger squat cannon is not a sharp weapon for defending the city, but the Shenjian City is tightly blocked by the Mongolian army, and the dark passage is too narrow to transport the heavy artillery into the city. In fact, these tiger squat cannons were not transported into the city through a secret passage, but Zan Wanshou sent craftsmen to set up pulleys on the edge of the cliff near the river in Shenjian City, and it took a lot of trouble to hang them into the city. The artillery brought by the Thunderbolt Army this time, in addition to the naval guns, is the light and ultra-light artillery used by the special battalion, which cannot even penetrate the shield of the new annex army to protect the siege weapons at a long distance. The medium-sized tiger squat cannon that was hoisted into the city was urgently mobilized from the Banshu army.

The Mongol scouts also knew that the Thunderbolts were hanging things from the city of Godarm. It's just that the pulley is on the south side of the river, which is too far away from the Mongolian army camp to see what was transported into the city. Niu Lin also knew that the Thunderbolt Army would transport personnel and equipment through the secret pass, but because there was no naval army, in order to reach the entrance of the dark passage and the pulley frame, he had to pass next to the Banshu army camp and receive the baptism of the camp artillery. What's worse is that even if you risk casualties to reach the dark passage and pulley frame, you will face stronger firepower.

The river flats were covered by artillery fire, and Niu Lin would not be stupid enough to do such a thing as giving away people's heads. It's just that Niu Ling didn't do this, it didn't mean that he had already killed the red-eyed Liu Quan, he took advantage of the night to send dozens of dead soldiers to sneak away, but he was shocked to find that the pulley was hanging high in the city. These dead soldiers were not reconciled, and sent a few more people to follow the secret passage to try to enter the Divine Arm City. It's just that they groped their way to the top in the dark, only to find that the wooden door at the exit of the secret passage did not move at all, and it was obviously blocked by a boulder.

The so-called "thieves do not fail", these dozens of dead soldiers were unwilling to return with nothing, so they decided to attack the boats in the river. In their opinion, even if they didn't complete the mission, as long as they could burn a few warships, they would be able to go back and make a difference. Liu Zhengjun is extremely strict - in other words, he is mean and unkind, if he goes back empty-handed, there will be some people among these dead soldiers who will lose their heads. As soon as they tiptoed towards the river, a dozen grenades were thrown from the tall reeds.

Before the grenade hit the ground and exploded, a dense burst of muskets exploded. However, it was dark at night, the muskets could not be aimed, and the grenades were only thrown at the sound of the sound, so only a dozen of these dead men were killed and wounded. Seeing that the sneak attack failed, the captain who led the team began to flee with a whistle. When he ran wildly through the Banshu military barracks, he ate another cannonball. When they returned to the camp, they found that only half of the people had returned.

The Thunderbolt Navy is very expensive as a technical unit, especially the main artillery warships are extremely expensive, even if the loss of one will make Li Shuang, who is in charge of government affairs, beat his chest, which is also the reason why Zan Wansheng made all the warships stop in the river. Not only that, but he also placed open and dark sentry and mobile sentry on the shore, and ordered a quarter of the sailors of the warship to take turns on duty.

The dead soldiers sent by Liu Chuan to attack had already been discovered. Zan Wanshou did not order the shelling of these dead soldiers, on the one hand, because the vision was poor in the dark, and the shelling effect would not be too good, on the other hand, Zan Wanshou thought that there were too few people, so he used a knife to kill chickens. Less than ten days after the Battle of Shenjian City began, the Thunderbolt warships and the Banzhou Army fired cannonballs and consumed grenades and mines, which far exceeded Zan Wanshou's expectations.