Just when Niu Ling's heart was in a mess and he was entangled in whether to withdraw from the army, the Banzhou camp made a big move. Since the Thunderbolt Army's sneak attack on Shenjian City was successful, the attention of the Mongolian army has turned to Shenjian City, and there has been no large-scale attack on the Banzhou camp, but only a small force has been continuously sent to attack and harass. That rainy night, the Mongol army's large-scale siege caused heavy losses to the Banzhou army, and the number of casualties alone reached more than 300, and if you add the light and serious wounded, the number of battle losses reached 1,000, many of whom were veterans of a hundred battles who followed the Yang family to live and die.

Such a high casualty rate made both Yang Wen and Yang Bangxian extremely annoyed, and vowed to make the Mongolian army pay for their blood debts. After re-completing the fortifications of the barracks, the Banju soldiers also frequently sent small units to harass the Mongol camp at night, so that the enemy could not even sleep. They even secretly planted mines near the Mongolian barracks, so that the enemy trembled as soon as they stepped out of the barracks.

The revenge of the Banzhou army will obviously not be a petty fight, but a fatal blow to the Mongolian army. As soon as Yang Bangxian and Zan Wanshou combined, they decided to extend the Banzhou military camp forward for two miles, and after the camp was built, the artillery on the warship would be erected in it. Such heavy artillery fire not only prevented the Mongol army from continuing to attack Shenjian City, but also bombarded the camp of the Mongol army.

Of course, Niu Lin knew what this move of the Banzhou army meant, and immediately sent 500 Mongol and Han soldiers to stop it. Yang Bangxian and Zan Wanshou also predicted that the Mongolian army would inevitably send troops to sabotage the construction project, so they had already prepared to deal with it. The Mongol Han troops who rushed over were first covered by the fire of the warships, and then engaged in close combat with the Banzhou soldiers in the trenches. Although the Mongol Han army was tall and had an advantage in hand-to-hand combat, it could not withstand the Banzhou army equipped with grenades, and there was no way to hide in the trenches, so they were blown up by grenades, but they lost more than half of them in half an hour.

Seeing that the frontal attack failed, Niu Lin sent troops to attack at night. Although the Banju soldiers were unable to build the fort at night, they also sent people to defend the unfinished wall and laid mines around the perimeter. At the end of the night, although the Mongol army destroyed about half of the wall built by Daysun, it paid hundreds of casualties, while the casualties of the Banzhou army were less than one-tenth.

At dawn on the second day, the Banzhou army began to build a wall in front of it in full swing, but the Mongolian army did not send troops to attack. Niu Lin could see clearly that the warships in the river were all facing the shore direction, and a large black iron pipe protruding from each of their open portholes. The battle of Shenjian City has been going on for half a month, and the men and horses led by Niu Ling and Liu's entire army have suffered a total of about 5,000 casualties, and only 10,000 soldiers and horses remain. With such a high casualty rate, the morale of the Mongolian army has been depressed to the valley, and there is no need to lose it senselessly.

"In the face of absolute firepower, any skill is futile", in the face of the Thunderbolt artillery and the Banshu army's camp extension tactics, New Lin simply could not find a way to crack it. If at this time, Niu Lu was still unwilling to defeat in his heart, and still had a trace of fantasy about the victory report, then an urgent military message from the direction of Zizhou made him fall into an ice cellar, and his hands couldn't help but tremble slightly on this hot summer day.

The military information came from the Mongolian general Baijianu stationed in Zizhou, who told Niu Lin that the Thunderbolt army suddenly sent troops to attack Jianzhou, and Yelumaizhu, who was defending the city, was killed in battle, and Liu Heima suddenly fell ill in anger. The remnants of the Mongolian army defending the city retreated to Zizhou City under the leadership of Liu Yuanli, the son of Liu Heima. At that moment, he had informed Kudu, who was on the Mianshui front, to lead an army to aid the state.

Baijianu also told Niu Lin that the Thunderbolt army attacking Jianzhou was Cao Ergou's department, which advanced by land and water, and its combat power was extremely fierce, under the bombardment of heavy artillery, the defense of Jianzhou city collapsed between the moments, and the Mongolian army and Han army defending the city carried out a desperate street battle, which only lasted for one day. According to Liu Yuanli, Cao Ergou's troops dispatched about 10,000 infantry and dozens of warships this time, and the momentum was very huge. After they took Jianzhou, they did not stop, but still came in the direction of Zizhou by land and water. If what Liu Yuanli said is true, it is difficult to hold on to the 2,000 defenders of Zizhou at present, and it is hoped that they will quickly send troops to support Zizhou.

Located not only in the middle of Tongchuan Road, but also in the middle of the Sichuan Basin, Jianzi and Zizhou are not only an important base for the Mongolian army to attack Sichuan, but also the source of grain and grass for the New Zealand army. Because these two states were so important, he was hesitant to send troops to help Liu Quan, fearing that the Thunderbolts would attack after the army moved south. It's just that under Kublai Khan's edict, he had to prepare to send troops.

Just when Niu Lin was delayed in leading his army south to Shenjian City, the Thunderbolt army withdrew from Genting City and Jintang to the rear, and the spies reported that the Jiading warships had gathered, and later the news came that the Thunderbolt army had sent to Xuzhou. The above news led him to conclude that the main force of the Thunderbolt Army had gone to Xuzhou and would go to Luzhou by water. Because of the prediction that there would be no longer a threat in the rear, coupled with the edict of the Great Khan and the constant urging of Liu Heima, he was relieved and bold to quickly march into the Divine Arm City.

Due to the excellent secrecy work of the Perak army, the total number of the Perak army in the Mongolian army's intelligence is only a few thousand, and the number of militia is only about 10,000. Based on the thinking of the agricultural era, whether it is Niu Ling or Liu Heima, they will not believe that the Thunderbolt Army can expand the army several times and form combat effectiveness in just one year, and if they learn about the current steel production capacity of the Thunderbolt Army, they will be shocked.

It is also based on the judgment that the main force of the Thunderbolt army is only a few thousand people and has all gone south along the waterway, Liu Heima is full of confidence in the defense of Jianzhou. As soon as Cao Ergou led the army to arrive, he was shocked. The number of Thunderbolt troops who appeared in Jianzhou exceeded 10,000, plus hundreds of large and small artillery, so that Liu Heima knew that he had fallen for the Thunderbolt army's plan, which was also the reason why he was frightened and sick. In addition to the same reason as Liu Heima, Niu Xuan is also worried that now that Jianzhou has been lost, if he loses Zizhou again, he will not only lose the grain route, but also be cut off from retreat.

At present, the Mongolian army under the city of Shenjian has not much food, and if it is stalemate here again, it will fall into a situation of food shortage. "People are iron, rice is steel," and once the army runs out of food, its combat effectiveness will inevitably plummet, and it will even collapse without a fight. Although the autumn grain in Luzhou has reached the harvest season, the people have already taken refuge in the mountains due to the war, and the Mongolian army cannot collect grain on the spot.

At present, there is a lot of grain in the fields, but harvesting the grain requires harvesting and grinding, and they cannot get it in the short term because they lack agricultural tools. Even if they have farm tools, harvesting food is a heavy physical task, and can they fight again after exhaustion? Moreover, it was impossible for the Thunderbolts to sit idly by and watch them go to the fields to grab food.

Without any suspense, the Mongol army under the city of the Divine Arm retreated. Niu Lin decided to retreat to Fushun Prison first, and then work with the army to help the hundred slaves in Zizhou. After the Mongol army withdrew from the camp, they set fire to the siege equipment and all the items that could not be taken away.

Looking at the Mongolian army that was gradually looking north, Zan Wanshou was helpless. He did not order Yang Bangxian to lead the Banzhou soldiers to pursue, but only sent a small group of scouts to follow from afar. The Mongol army still has 10,000 men, while the Banju army and the Perak army have less than half of their land combat strength. The 1,000 elite cavalry under Niu Lin were still unscathed, and if they rashly sent troops to pursue, they would fall into the trap set by the Mongolian army. No matter how strong the Banshu army is, it has lost the protection of the barracks, and it will definitely not be able to resist the impact of the elite cavalry in the field.

When the scouts sent by Zan Wanshou chased after the mouse pass, they saw a large group of soldiers of the new annex running towards the hill next to the road without their lives, and the Mongolian cavalry behind them fired arrows while chasing. The mountains beside the road were rugged and steep, and after the new annexed soldiers fled into the dense forests of the mountains, the Mongol cavalry could not shoot the deserters with their bows and arrows, nor could they drive them up the mountain, so they had to stay for a while and then leave in a daze.

After the Mongol cavalry was gone, the new annex on the hill sent someone to find the Thunderbolt scouts. It turned out that these new annexes numbered about 400 people, all of whom were Liu Quan's subordinates, and their families were still in the city of Shenji.