On December 7, Huangtai Jiling Dolgon and Dai Shan presided over the withdrawal of the troops, and returned to China with a small number of troops first. On December 19, Huang Taiji, who arrived on the Yalu River, received news of the rebellion between Mang Gurtai and Amin, and although Wei Qi put down the rebellion, Mang Gurtai committed suicide, and Amin fled Shenyang and his whereabouts are unknown.

On the one hand, Huang Taiji sent people to Shenyang to give an order, demanding that all passages to the Ming Kingdom be strictly blocked, and that Amin must not be allowed to escape into the territory of the Ming Kingdom, and on the other hand, he accelerated his march to Shenyang again, hoping to return to Shenyang as soon as possible to preside over the overall situation.

And just when Huang Taiji was nervously rushing to Shenyang, the battle near Yizhou had come to an end. After the Ming army besieged the Zhenglan Banner in the city of Yizhou, they set their sights on the Karaqin tribes near the city of Yizhou and the Zhenghong flag led by Yue Tuo.

The Ming army first blocked the back road of Subudi, and surrendered Subudi by Ling Zhuoerbi, so as to bloodlessly subjugate the Karaqin tribes grazing from Yizhou to the upper reaches of the Xihe River in the north. Without the assistance of these Mongolian tribes, the Yuetuo Division, which had become a lone army on the east side of Yiwulu Mountain, had to retreat to Beizhen City on the west side of Yiwulu Mountain in order to avoid being surrounded by the Ming army.

Beizhen City is Guangning City, located at the eastern foot of Yiwulu Mountain, the city wall is covered with bricks, nine miles and thirteen steps around, three zhang high, it is the political center and military town of Northeast China in the past, and its status was higher than that of Shenyang, Liaoyang and other cities. After the founding of the Later Jin Dynasty, the situation in Liaodong changed greatly, and this former political center of Liaodong became a border city between the Later Jin and the Ming Dynasty.

Yue Tuo led his troops back to Beizhen, naturally not to protect himself, but to wait for the arrival of reinforcements from Shenyang, so as to attack the Yizhou area again and rescue Zhenglanqi. As for whether Zhenglan Banner can hold out until the arrival of reinforcements, Yue Tuo is no longer willing to think about it. He can only hope that the soldiers of the Derge and Zhenglan Banner still remember their relatives in Shenyang, and remember that they are Jurchens who are inseparable from the Ming people, and they will stick to the city of Yizhou to the end.

However, while Yue Tuo was waiting for reinforcements from Shenyang, the Ming army was not idle. Under Sun Chuanting's order, the two divisions stationed in Shanhaiguan and Ningyuan were dispatched, and the Yizhou front reached the strength of 4 field divisions and 5 cavalry divisions, and the strength of three field divisions was still maintained in the area from Daling River to Jinzhou.

2 field divisions and 3 cavalry divisions blocked the siege of Yiju City, and defeated the Zhenglan Banner that wanted to abandon the city and flee several times in a row, forcing the Derge class to hold on to Yiju City and wait for rescue.

The other two field divisions, with the help of the Mongol cavalry, attacked the various passages of Yiwulu Mountain. Under the leadership of Subudi, several of the most important passages near Beizhen City fell into the hands of the Ming army one by one. The red flag does not have so many troops to guard every passage, and the mountain shape of Yiwu Lu Mountain is peculiar, it is surrounded and covered, there are as many as six layers, and the grass and trees cover each other, although it is easy to defend and difficult to attack, but it is extremely consuming of troops.

The Jurchen soldiers, whose morale was not high, finally gave up all the passages to the Ming army with high morale one by one, but only kept the exits of several mountain roads near Beizhen. After arriving in Beizhen with Shenyang reinforcements, Jilharang began to fight with the Ming army again for various passages.

However, although the strength of Houjin increased, it still fell behind in the battle to seize the mountain road. Because the various firearms of the Ming army were much more powerful than bows and arrows in such terrain, especially on the narrow and dark forest paths, the * of the Ming army was a nightmare for the Later Jin army.

Since Chongzhen ordered the ordnance superintendent to focus on the development of muskets and artillery, the dazzling * weapons of the Ming army have all but disappeared. *Although this weapon has been preserved, the amount of production has been greatly reduced due to its power.

*Loaded*, if you want to have satisfactory lethality, you must make it extremely bulky, which is not only inconvenient to carry and buri, but also expensive to build. Due to the backwardness of ignition technology, such a * is still very easy to find, so for the Ming army, * is like chicken ribs.

But for that kind of irregular warfare, the pioneers against the natives, or the militia against the regular troops,* became a weapon of panic. However, considering that the Ming army seems to be more likely to be the victim of this kind of war, the Ordnance Superintendent has always been in a dispensable attitude towards the development of *.

However, for the craftsmen in charge of the development of *, the increase in power, the improvement of cast iron technology, and the change of guiding ideology, that is, first determine the target role of the weapon, and then study according to the goal. So that they didn't spend much effort, and the power of * was increased enough.

Although the ignition technology is still under development, it is only the use of ignition technology, and in such a special environment, the conditions for full use have been obtained. Instead of killing the target, the goal was to kill the enemy's leg, and the *power began to change from increasing the power to exploding more shrapnel when it exploded.

The appropriate reduction of the charge volume makes the shape of * shrink to the size of a melon, which is not only easy to carry but also suitable for burial, and can also be truncated in case of emergency*, and thrown directly into the enemy team from a high place after ignition. Although the lethality of these new types adopted by the Ming army was not amazing, the panic caused to the Later Jin army far exceeded that of other weapons.

After all, in this era, there is almost no difference between injury and death, and officers who are not at or above the intermediate level will not receive much treatment. And a wounded soldier often needs several people to carry him down the mountain.

The Ming army guarding the mountain road used these technical weapons to successfully make up for the gap in combat experience between the troops of the Houjin long-standing battle formation, and firmly blocked the Houjin army to the east of Yiwulu Mountain. And the news of the mutiny from Shenyang not long ago made Yue Tuo and Zilharang feel that the shadow of defeat was hanging over their heads.

Although Yue Tuo and Zilharang blocked the news from their subordinates, some rumors eventually spread among the army, which also made the soldiers even less confident about attacking the mountain passes of Yiwulu Mountain.

On November 30, it was determined that it was temporarily difficult for the Yuetuo and Jierharang departments in Beizhen to cross the Yiwulu Mountain; The Azig division retreated to the vicinity of the Liao River after the Daling River began to freeze; Abatai's troops were confronting the Ming army in Jinzhou and Jinzhou and Dalian. Sun Chuanting decided to officially launch an attack on Yizhou City, so that the Zhenglan Banner in the city knew that the walls of Yizhou City were not to be feared.

Nearly 60 artillery pieces set up by the Ming army in the southwest corner of the city of Uiju bombarded from 1 p.m. on November 30 to 9 a.m. on December 2, pouring nearly 45 tons of shells on the southwest corner of the city, knocking out the southwest corner of the city into ruins.

The Derge class finally erected the white flag, and the soldiers of the Zhenglan Banner in the city have woken up, and the Ming army does not need to enter the city to fight with them, but only need to push the cannon up and bombard the neighborhood by neighborhood, no matter how much they consider themselves brave, they can't stop the cannonballs fired by the Ming army's cannons.

On the afternoon of December 3, the defenders of Yiju City opened the city gate and, according to the requirements of the Ming army, went out of the south gate with their bare hands to surrender. Derge led 5,864 people from the Blue Banner, 323 people from other banners, and 1,968 people from the Han army surrendered to Sun Chuanting, and the city of Yizhou was recovered.

Sun Chuanting appeased the Derge class, and on the grounds of the shortage of food at the front, he temporarily dispersed the surrendered men and horses of the Zhenglan Banner to Ningyuan, Suizhong, and Shanhaiguan for wintering, and ordered a field division to accompany the Zhenglan Banner to the south to monitor. As for Derge himself, he was sent to the capital and went to wait for the emperor's disposal.

The city of Yiju was captured by the Ming army, and the news that the Zhenglan Banner surrendered to the Ming army from below the Derge class soon spread throughout the front line. This not only greatly boosted the morale of the Ming army, but also made the morale of the Later Jin army low again. Azig's headquarters simply retreated across the Liao River, completely exposing the flanks of Beizhen.

Yue Tuo and Zierharang had to switch from offensive to defensive, from the goal of breaking through Yiwu Lu Mountain to recapture Yizhou to garrisoning Yi Wu Lu Mountain to keep Quang Ninh from losing. From the topographical point of view, Yiwulu Mountain is not only the division between Jinzhou and Guangning, but also the division between Jinzhou and Shenyang.

Having lost Yiwu Lu Mountain, Shenyang was no longer in danger before. In the past, the Houjin soldiers claimed to be invincible in the field, and the terrain of this Ma Pingchuan naturally became the moat of the Ming army. But after this battle, whether Houjin can still regard this vast plain as his own moat, this is two words.

However, so far, there is no problem for Houjin to keep the front line of Quang Ninh. Of course, in the eyes of Li Hongyuan and other staff officers of the Ming army, the current Guangning defense line of Houjin is simply full of flaws.

After the city of Yizhou was down, Li Hongyuan took the battlefield situation summarized by the former enemy's staff and made a military report to Sun Chuanting and Mao Yuanyi.

In this report, Li Hongyuan suggested: "... The Later Jin had previously waged a large-scale expedition in Liaodong, but due to the lack of troops, the fortresses and gates they occupied could not be garrisoned one by one, and they were afraid that our country would make a comeback, so they had these fortresses to resist them. Therefore, in addition to the military towns such as Beizhen and Liaoyang, the fortresses and Great Wall in other places have been demolished and destroyed.

After our army recovered the Uiju area, only a few fortresses of Beizhen, Heishan, and Xiping were left between Yiwulu Mountain and Liaoshui, and other places were completely unprotected. In the past, Yiju was in the hands of the Houjin, and these areas can also be regarded as the hinterland of the Houjin, so naturally there is no hindrance.

However, after our army recovered the Uiju area, as long as it crossed the north side of Yiwulu Mountain, this area was directly threatened by our army. The difference between China and Houjin is that China is big and Houjin is small. Therefore, from the point of view of strategic principles, the more battlefields are opened, the more beneficial it will be for our country. The more dispersed the Houjin forces, the more unfavorable it will be to the Houjin.

Between Yiwulu Mountain and Liaoshui, there is a flat river, more than 400 miles long from north to south, and more than 100 miles wide from east to west, but there are less than 10 strongholds for its garrison, and the defense can be described as fragmented. However, a large number of Mongolian tribes and some Han Chinese villages were settled in the area, which provided meat, horses, food, and soldiers for the troops stationed here in the Later Jin.

If our army fights the Houjin army head-on, judging from the current situation, the logistics of the Houjin army are still superior to ours. However, if our army relied on Yiwu Lu Mountain to confront the Houjin army, and sent Mongolian cavalry to cross Yiwu Lu Mountain from the north, plunder the tribes and villages in this area, and move the Mongolian tribes and Han people in the area to Yizhou and Chengde, then the Later Jin army would become a lone army in the region.

In the future, it will be difficult for Jin's national strength to support such a huge garrison from hundreds of miles away..."

After some discussion, Sun Chuanting approved Li Hongyuan's suggestion, mobilized the men and horses of Zhuoerbi and Subudi, crossed the Yiwulu Mountain from the north, and plundered the Mongolian tribes and Han villages in the area east of the Yiwulu Mountain and north of Beizhen.