It took the Mongols a few more days to prepare a large number of other siege equipment before the siege began. In the past few days, the Mongols have not been idle, and they have continued to fire at Yokohara Fort with trebuchets, hitting the walls of the fortress into potholes, and even smashing the roof above the city wall in many places, but fortunately no gunners were injured. The top of the city wall is much thinner than the wall, and its main purpose is to prevent the damage of the bow and arrow to the gunner and the rain to the artillery. Cao Ergou was calm, and in the face of the constantly flying stones, he did not give the order to fire. He is ready to deal a fatal blow to the enemy when it is attacking the city. Although the fortress cannons on the city wall that are aimed at fire cannot hit the trebuchet, the more than ten heavy tiger squat cannons transferred from Wanjiaping can destroy the trebuchet behind the earthen wall. These tiger squat cannons were arranged in the inner fort of Yokohara Fort, far outside the range of the enemy's trebuchet, and Cao Ergou had already ordered someone to set up a shooting Zhuyuan, and the enemy's trebuchet could be destroyed in a few rounds of shooting.

The reason why Cao Ergou didn't fire the cannon was because what he brought back from Wanjiaping was not only the tiger squat cannon, but also Ouyang Xuan's two sentences: "Let the enemy feel that he has hope of winning; To be merciful to one's enemies is to be cruel to one's own people." The former sentence is to tell Cao Ergou not to forget to show weakness appropriately, and to use the advantage of the fortress to consume the strength of the Mongolian army as much as possible, and the latter sentence tells him that the civilians who help the enemy are not completely innocent, and according to the habits of the Mongols, they will definitely let the people be the cannon fodder for the siege, and they must be psychologically prepared for indiscriminate shelling. In fact, not only Ouyang Xuan, but even ordinary Thunderbolt soldiers knew that the Mongols would definitely let Minfu and the new annexed army be sent to death as cannon fodder, and they did this on the one hand to consume the defenders and gain another fisherman for themselves; On the other hand, it is to kill people with a knife, and only by killing some of the new annexed troops and people by the hands of the enemy can they rule more solidly. If Yokohara Fort is lost due to shrinking, it will be the most terrible disaster. Ouyang Xuan knew that he needed to give Cao Ergou a clear instruction.

The secret fire is full of confidence this time, ready to take Yokohara Fort in one fell swoop. He was also a battle-hardened general among the Mongols, and was appointed by the Great Khan of Möngke as the military governor in western Sichuan. He also lived up to the expectations of Meng Ke Khan, and since entering Sichuan, he has repeatedly attacked the city and pulled out the fortress without tasting defeat, which made his heart very high and more arrogant, and even contemptuously called the Song people "grass seed eaters". In his eyes, although Yokohara Fort was strong, the surrounding terrain was flat, and it was obviously not comparable to other fortified fortresses captured by the Mongol army. In addition to being located on the top of a steep mountain, these fortresses have been painstakingly operated for many years and have the support of a complete defense system, and the number of people is also more than this Yokohara Fort, so they have not also been conquered? He was confident that he could fight in one battle, and even showed off to Liu Heima that he could attack the city in the morning and celebrate his achievements at night. Of course, although the secret one Huoli is arrogant and arrogant, he is not incompetent, and he is also good at listening to the opinions of his subordinates such as Jiagu Longgu and other subordinates, and has made careful planning and preparations. This time, in addition to leaving 500 cavalry to defend the camp, he sent the rest of his men and horses out to devote himself to the siege battle, and also prepared a large number of siege equipment such as siege trench bridges, ladders, chariots (for concealed personnel during siege), hitchhikers, hungry husks, hook crash cars, etc. Of course, it must be the new annex army that took the lead, and the Mongol cavalry naturally supervised the battle behind.

Due to the narrow attack surface of Yokohara Fort and the relative length of the earthen wall was only a few hundred meters, the Mongolian army divided the new annex army and the people into three teams: the front, the middle and the rear. Naturally, the front team hid behind the earthen wall, the squadron hid in the trenches, and the rear team stopped in front of the new annex camp. These people and the new army will be stuffed from the trench to the front of the camp of the new army, and the voice is extremely powerful. The secret Huoli adopted Jiagu Longgu's siege suggestion, that is, quickly rush to the dead end of the artillery under the city wall, and rush up with the advantage of numbers, as long as the city head is attacked, it can be completed. Although the new annexes of the siege were divided into three teams, each team still had more than a thousand men, and as long as they rushed to the bottom of the wall with their men in tow, they could even climb the wall with a long ladder and a hook and rope. The scout's intelligence told him that there were only 500 to 800 men in this Yokohara fort, and the defenders at the head of the wall would definitely not be able to withstand such a dense attack.

Under the dense fire fired by trebuchets, hundreds of people pushed siege equipment to drill out of the wall and marched towards Yokohara Fort. Behind the siege equipment were fifteen hundred new annex soldiers. As the siege equipment slowly advanced, Yokohara Fort did not fire cannons or even arrows. In the eyes of the Mongols, this was because Yokohara Fort had been suppressed by trebuchet fire. In the past few days, stones have smashed the surface of Yokohara Fort into potholes, but the defenders have not returned fire. In fact, except for a few places where the Yokohara Fort was destroyed, it did not suffer any major damage, and it did not have the slightest impact on the combat strength of the Thunderbolt army. Cao Ergou was not in a hurry to open fire, he was waiting for the best time to deliver a fatal blow to the enemy. Now that the artillery in the inner and outer forts of Yokohara Fort has been adjusted in place, and the ammunition has been carried in place, it is possible to fire quickly at the first command. The height difference between the outer fort and the inner fort is 12 meters high, allowing the artillery to form cascade fire and a death zone in front of the fortress.

When the siege equipment was about to be pushed to the edge of the trench, the trebuchet stopped firing. Although their trebuchets are high-tech weapons in this era, they can't shoot accurately at all, and their impact points are scattered very widely, and they can only achieve range killing. The ancient order of the Jiagu Dragon to stop shooting was because he was afraid of accidentally injuring the soldiers of the new annex army who were swarming up. Due to the reward order issued by the secret one, the first person to climb the top of the city wall will be awarded the post of Yongkang County Order, and the first ten people to climb the city wall will also be given official positions and financial rewards respectively. There will be brave men under the heavy reward, and the brave men among the soldiers of the new annex army have now crossed the trench and rushed to the base of the wall, waiting for the arrival of the siege equipment. By this time, the trench had been filled in two-thirds of the way, and the good ones could leap up, but most people had to use equipment to cross the trench successfully.

Just as the siege equipment was pushed to the edge of the trench, the artillery of the Thunderbolts rang out intensively. After a series of earth-shattering loud noises, gunpowder smoke enveloped the entire battlefield. After the explosions stopped, there was a brief and eerie silence on the battlefield, and only a few moments later began to hear wailing. At this time, a chorus of shouts came from the city wall: "The Tartars are brutal, jump into the trench and go to the mountains to live." The shouts of the Perak soldiers caused the dazed citizens to wake up from a dream and jump into the trenches. There were more than 500 people pushing siege equipment, and about 300 people followed the bottom of the ditch to the vicinity of the mountain pass. Several long ladders have already been erected at the bottom of the ditch here, and it only takes a few tens of meters to climb the long ladder to reach the mountain pass, where there are Perak soldiers waiting. Along with the minfu were dozens of soldiers of the new annexed army, who were armed at the pass and ran with the minfu to the mountain. They will be searched and screened one by one in Wanjiabao, and then scattered and placed in various villages and mines.