Seeing the smoke and dust rising in the direction of the horizon, Yang Wenan knew that it was the reinforcements of the Thunderbolt Army coming from the direction of Mianzhu, and he couldn't help but start to feel anxious. At this time, most of the 3,000 soldiers under his command had already arrived, and such a large advantage in strength could not take the small fortress in front of him, so how could he explain to his uncle Yang Dayuan? Behind him were the Mongol cavalry. Although Liu Heima claimed to have sent Hudu to lead a thousand cavalry to attack Mianzhu with him, anyone with a discerning eye knew that the Mongol cavalry was not responsible for attacking the fortifications, but as a supervising team. Although Kudhu would cooperate closely with the new annexed army under Kublai Khan's strict orders, he would definitely not attack the fort of Jianchengli. One is that the task of cavalry is not to attack fortifications, but to fight in the field; Second, he really had enough of the hardships of firearms, and even if he wanted to attack the fortification, he had to let the new annex army consume almost the ammunition of the fortress before he could go into battle.

Yang Wen'an begged Kudu to send cavalry downstream to see if he could find a gap to cross the river to bypass the Thunderbolt army, while gritting his teeth and ordering the Iron Man Army to prepare for battle. The Liao, Jin, Western Xia, Mongols and other northern nomads all had heavy cavalry, and the Song army, which lacked good horses, developed heavy infantry, such as Yue Fei's famous Beiwei army. Yang Dayuan also had a 400-strong heavy infantry, which was carefully trained by tall soldiers. These heavy infantry are covered with iron armor except for their eyes, and the whole body of iron armor weighs 80 catties, which can resist sword and arrow attacks, and is also called the Iron Man Army. The Iron Man Army is powerful but costly, and Yang Dayuan regards it as a weapon for a decisive battle, and he will not be dispatched at all under normal circumstances. This time, Yang Wenan led 200 people to come, which shows the importance he attaches to this battle.

The new annexes were outnumbered, and in a short time they cut down large areas of trees. They first erected a fence on the bank of the river with logs to block the shotgun from the fortress, and then braved artillery fire to erect a makeshift pontoon bridge on the water. To say that the water on the river directly opposite the fortress is shallow and only more than ten meters wide, it is not difficult for the new annex army who are proficient in siege equipment to build a pontoon bridge. After making these preparations, Yang Wen'an ordered 200 soldiers carrying giant shields to walk in front, followed by 200 soldiers carrying short logs and earthen bags, followed by 200 crossbowmen, and at the back were 200 iron man soldiers. In order to help the Iron Man climb the riverbank, two light infantry were also assigned to each of them.

In order to take the fort in one fell swoop before the Perak reinforcements arrived, Yang Wen'an invested a total of 1,000 men in this narrow area for this attack, and for a time the river beach was full of new annex soldiers. Looking at the black and crushed enemy below, the Thunderbolt troops on the fortress naturally desperately opened fire and threw grenades. After the construction of the improvised pontoon bridge, the Mongolian army ran much faster without hindrance, and rushed to the dead end of the artillery fire after only two rounds of artillery, and the giant shield also blocked a lot of shotguns, so the casualties were not as serious as the first two times. The sluggish Iron Man suffered three rounds of artillery, but only a few men were lost, not only because of the protection of the giant shield, but also because the shotgun was not powerful enough to penetrate the iron armor - the defenders did not know that these people were heavily armoured, and they also reduced the charge for the sake of saving ammunition, because the gunpowder was almost depleted.

Under the cover of the crossbowmen, the new annexes approaching the fort did not suffer much counterattack, as the defenders' grenades were depleted, and the scattered musket bullets were mostly blocked by the giant shields. The new recruits threw short logs at the wall, detonated the remaining mines, and covered the dirt bags on the pile of wood, creating a slope leading to the head of the fortress. The wall of this fort is only seven or eight meters, and it is easy for hundreds of people to fill in a passage. Watching the soldiers of the new annex crawl along the slope towards the fortress, the defenders could no longer care about shooting arrows, and picked up their swords and spears to desperately stop the enemy. It's just that there are only more than 20 Thunderbolt soldiers in the fortress, and there are no firearms to fight against hundreds of people, so in a matter of moments, the new annex army rushed to the fort wall and slaughtered all the Thunderbolt soldiers on the wall.

All this was seen in the eyes of the commander of the cavalry company of the Thunderbolt Army, who was about a mile away from the fortress. When the new annex army made a comeback, the commander of the cavalry company saw that the enemy who had come ashore was as dense as an ant colony, and he secretly said that it was not good. It's just that the enemy army has a large number of people, with spears, giant shields, and crossbowmen, and the remaining seventy or so horsemen must be more than lucky. The fortress had high walls and mines, and guessing that the new annexed army would be helpless for a while, they hesitated to continue to wait for the opportunity. Unexpectedly, under Yang Wen'an's attack combination punch, the fortress was taken in an instant. And now the fortress will be lost, if there is no more attack, when the new annex army across the river stands on a stable foothold, a large number of Mongolian troops will inevitably swarm from this breakthrough. Without the natural line of defense of the river, the Thunderbolts will inevitably have a very difficult battle to follow. Thinking of this, he wanted to lead the people straight towards the enemy.

As soon as the cavalry was running, there was another loud bang in the direction of the fortress. A large number of the soldiers of the new annex who were shouting and cheering at the fortress wall were blown down, and many were thrown into the air, and a few lucky ones fled back with the soldiers under the wall. It turned out that when the new annexed army came ashore, Yang Sanwa and Li Laosi were sent by the platoon commander to the arsenal in the basement of the fortress to try their luck and see if there was still ammunition. After some searching, they found a mine and a dozen bullets and some gunpowder in the corner. Yang Sanwa has a fast personality, and when he rushed back with something and was about to report the good news to the platoon commander, he found that the robes on the wall were all dead under the knife. In a fit of rage, Yang Sanwa rushed into the new annex group with the ammunition she had found, and detonated the mine.

Watching his best friend for many years die with the enemy, Li Laosi, who was full of tears, was not too sad, and only hatred filled his heart at the moment. Taking advantage of the opportunity of the new annex army to retreat like a tide, Li Laosi ran to the other two walls and moved the ammunition of the artillery over. The ammunition for these cannons was running out, only enough for Li Laosi to barely make two improvised explosive packs. At this time, the retreating new annexes slowly approached the fortress wall, and they crept forward under the cover of a dense rain of arrows. Although these cannon fodder knew that there was only one person in the fort, they did not dare to boldly advance. The Thunderbolt soldier who rushed into the crowd with gunpowder just now was simply crazy in the eyes of the new soldier who was only serving as a soldier for food and for promotion and wealth.

Not surprisingly, the new annex soldiers, who had climbed up the gentle slope, were bombarded with explosives packs and retreated like a tide. At this moment, Li Laosi, who was hiding behind the battlement wall, was unable to move, he was hit by an arrow in the shoulder and leg, and the last explosive bag in his arms was reserved for the next group of new annex soldiers to attack, as well as for himself. At this moment, the sound of dense horse hooves sounded, and the cavalry company of the Thunderbolt army rushed over. The sudden change in the situation on the fort wall just now made the cavalry company commander temporarily change his idea of charging the enemy with all his troops. He divided the men into three parts, the first part of the dozen cavalry rushed to the slope of the fort wall, the second part of the thirty cavalry to the back gate of the fortress. He led thirty cavalry straight to the array of the new annexed army, and the target was the crossbowmen of the new annexed army.