After Sun Chengzong agreed, he called Cao Wenzhao and Hou Shilu. Sun Chengzong ordered Cao Wenzhao to lead two thousand cavalry to follow Li Laoer to act together, and ordered Hou Shilu to allocate a thousand soldiers from the Shenji Camp and be under the command of Cao Wenzhao.

It is said that it is under the command of Cao Wenzhao, but in terms of operation routes and attack time, Li Laoer is still the decision, but Li Laoer's plan needs to be ordered by Cao Wenzhao.

After one night of preparation, Li Laoer asked Cao Wenzhao and the leading soldiers in Hou Shilu's army to prepare a batch of fried noodles and dry food overnight according to the method he taught, and then stew the frozen horse meat to make braised horse meat. It was cooled and allowed the soldiers to carry it.

The craftsmen in the Blacksmith's House have rush to make two three-year three-pound field guns. The artillery trucks and gun mounts have been made, and more than 200 shells have been cast. Li Laoer asked someone to bring all the two field guns and the equipped shells.

The chariot camp was specifically responsible for launch vehicle soldiers. Sun Chengzong took out two hundred sled cars, gathered all the horses, and gave them to the cavalry troops and chariot camps to use.

To be honest, Li Laoer was also gambled. Because history has undergone a small change, at the time point, the Later Jin army was delayed by Li Laoer for more than half a month. Li Laoer simply pushed it back for half a month based on the timetable of the Later Jin army in memory. In addition, some uncertain factors, according to his estimate, the error is no more than two or three days.

According to the memories left by seeing this history in my previous life, the Later Jin army fought fiercely with Mangui and Zu Dashou outside Yongding Gate, and there were still Mongolians stationed in Gu'an. After the Battle of Yongding Gate, Huang Taiji ordered the Mongols to transport gold, silver and silk from Gu'an County to reward Jin soldiers injured in the Battle of Yongding Gate.

From this we can see that the Later Jin army regarded Gu'an as a place to hoard property, and was stationed by the Mongols and surrendered Ming army. The specific number of troops Huang Taiji left in Gu'an was not introduced in detail in the information.

Of course, what Li Lao Er feared most was the butterfly effect, which showed a large change. The time deviation was more than twenty days. So when Li Lao Er went to Gu'an, it was like delivering goods to his door. They were all cavalry and snow chariot soldiers, and they could run away, but they would also suffer a lot of losses.

In fact, the best and safest way to deal with the Later Jin Dynasty at this time is to persuade Lin Danhan to send troops to Korqin and destroy Korqin's tribe, which would hit Huang Taiji the most. However, Li Laoer also knew that Lin Danhan was stubborn and insisted on his own, so it was impossible for him to touch him. Moreover, Lin Danhan was fighting the Tumote people at this time, and was looking for Tumote Khan like a mad dog on the grassland nearby.

Although Li Laoer felt that the judgment would not go wrong, he still sent elite Ye Wubiao to explore the way forward, so as not to bring less than 5,000 people with him, and ended up surrounding the Later Jin army.

The Mongolian Li Hong naturally took on the position of captain of the team. He led a hundred people to the team and set off in front of the team to spy on the military situation of the Later Jin Dynasty.

"The Tartars are rampant in the Gyeonggi area. We need to know whether the main Tartars have already gone to Nanyuan and how many Mongolian Tartars are there in Gu'an. Can you be competent?" Li Laoer looked at Li Hong and asked.

Li Hong knelt on one knee, clenched his right fist and placed it on his chest and saluted: "Please rest assured, brother! He will definitely fulfill his mission! I guarantee that the Tartars will be exposed!"

"Okay, go! You must come back alive with your brothers! Come back to Xianghe and find us."

Li Hong led more than a hundred men to set off Yebu, and there were only 500 brothers left by Li Lao Er, and the remaining 3,000 were Ming troops that he did not control. However, Li Lao Er was very relieved about the combat effectiveness of Cao Wenzhao and Cao Bianjiao. With this uncle and nephew, he could break through the siege as long as he did not encounter the Later Jin army with ten times more troops than him.

The two thousand five hundred Ming army cavalry were one man and two horses, and two hundred sled carts were all equipped with four horses. The Ming army set out on the first day of the first lunar month of the third year of Chongzhen. They left the Tongzhou camp and marched southwest.

It was originally the 30th day of New Year, and today was the first day of the first lunar month, which was the Chinese New Year. However, due to the invasion of the Later Jin Dynasty, the military and civilians in the Jingji area could not celebrate the New Year. Before going to the expedition, the Ming army only had a full meal and added some meat. Everyone knows that it is possible that they will not be able to come back if they go out.

From Tongzhou to Gu'an, it was only more than 200 miles away. According to the marching speed of the cavalry and sled car, it only took two days to reach. However, Li Laoer did not walk too fast, but asked most of the cavalry to board the sled car and walk slowly to save horsepower. At the same time, it was to wait for Li Hong to stop the team and come back to report the situation.

Three days later, the Ming army arrived in the Xianghe area.

Cao Wenzhao called under the city for a while, and the magistrate of Xianghe asked to open the city gate and let the Ming army enter the city of Xianghe.

Li Laoer glanced at the defense facilities at the top of the city and whispered in Cao Wenzhao's ear: "General Cao, tell the county magistrate to put a wooden fence on the top of the city and create another batch of city-defying weapons such as wolf teeth pats and yakshas."

Cao Wenzhao understood what Li Laoer meant and knew that he was worried that the Later Jin army would go back to attack Xianghe County and that Xianghe could not defend. So he taught the county magistrate to lay wooden fences on the top of the city, and based on the weapons designed by Li Laoer, the city's guardians could cut down wood and create weapons to defend the city.

Part of the cut wood was built with wooden fences on the top of the city, and the other part was used to build door-blocking knives, wolf-fangs, yakshas and city-guarding winches. At the same time, a batch of log shields and large shields were created for the Minzhuang who was guarding the city.

"All turbulent oil tanks and lime bottles must be prepared, so boil more gold juice; if there are no cannons in the county, a batch of catapults will be built." Cao Wenzhao explained to the soldiers and civilians in the city little by little according to Li Laoer's suggestion.

There were door-blocking knives behind the city gate, and a batch of knives were also equipped on the top of the city; a large number of wolf teeth were hung on the top of the city, and the winch of the Yaksha was assembled on the top of the city.

The purpose of laying a wooden fence on the city was to prevent the Later Jin army from entering the city. There was a wooden fence blocking it. Even after the Later Jin army entered the city, it would be attacked by long spears and three-eyed guns, but it would not be able to fight back. Because the troops who climbed the city only carried short swords and shields, could not carry long weapons, nor would they carry bows and arrows. Those weapons that were in the way were not conducive to climbing the city walls to fight.

As long as the city head is divided into two pieces with a wooden fence, the opponent will be knocked down even if he climbs up the city wall.

Li Laoer stayed in Xianghe for two days. After the defense facilities of the county were guided by him and Cao Wenzhao, many weapons were added to defend the city. The guards of the city were also given more shields and strengthened their defense.

On the third day, Li Hong and his Yebu retreated their team back, killing two brothers, seriously injured one person, and slightly injured more than a dozen, but they brought back twenty-three heads of the Later Jin soldiers.

"Brother, I live up to my brother's high expectations and have already discovered the trends of Jiannu! As expected, the real slave has left Gu'an and went to Nanyuan. There are only Mongolians and surrendered soldiers in Gu'an City to defend the city."
Chapter completed!