It is different from Jiangnan Province in the Qing and peaceful and prosperous times of Haiyan River; On the land north of the Huajiang River, wolf smoke has already been lit in the sky.

After Xu Ronghuan's death, Emperor Tianyou appointed his fourth son, Zhou Chang'an, to go to Hedong City to take command of the enemy. This move not only demonstrated Zhou Yuanqing's ambition to defend the territory, but also calmed the wavering Northern Yan army in one fell swoop.

As a result, Hedong City, a medium-sized city, became a stone mill in this battle, rapidly consuming the vitality of both sides.

However, the Hedong battlefield, which was originally evenly matched, ushered in a huge turning point when the 150,000 reinforcements of the Qin army and the second batch of siege equipment arrived safely at the front line camp.

On the day of the arrival of the reinforcements and war supplies of the Second Route, Chen Ziling, the commander of the Qin Army, personally rewarded the three armies. In the early morning of the next day, he took out the written suicide note and read it aloud, and then made a blood oath in front of the battle!

Before Hedong City was broken, even if only he Chen Ziling was left, the momentum of attacking Hedong City would definitely not stop!

Chen Ziling took his body as a flag, stripped off his upper body, climbed onto the drum platform in the formation, and personally beat the drums for the soldiers charging ahead; Seeing that their own coach was leading by example, the soldiers of the Qin army also ignited their fighting spirit. They launched a fierce assault on the four walls of the city without any day or in batches.

Under the city of Hedong, a non-stop battle was launched day and night, which also pushed the already exhausted soldiers on both sides to the final limit. Not only did Chen Ziling supervise the battle for three days without sleeping, but also swollen his two arms twice; Zhou Changan, as the commander of the Northern Yan Army, also spent three days and three nights with him in the same way!

Who is Zhou Changan? Growing up in the extremely rich and noble emperor's family since childhood, he has great attainments in civil and military affairs, and his character and appearance are even more superior, which can be called the ultimate dream of the people of Huayu. However, during these three days, he was as rich as him, but he never retreated half a step from the tower! Not only did he and the soldiers in the city get up together and rely on the water to dry up their stomachs; From these vulgar and unbearable fighting men, I learned back the habits of a soldier.

During the three days, the four princes would often stand on the extremely dangerous battlements of the city wall, and defecate in front of the enemy troops swarming below the city. His rogue behavior greatly aroused the ferocity of the soldiers defending the city, and even ripped off the golden crown of the prince on his head and threw it out of the clouds.

It can be said that since those three days, the lieutenant generals of the Northern Yan Army do not know any four princes, only one Zhou Chang'an.

Zheng Qian, a military advisor who studied under Wang Fang, was also a typical literati. But under the "leading by example" of the four princes, he lost the dignity and elegance of the literati. Indeed, in these three days and three nights, the extreme bravery was Zhou Chang'an, the commander of the three armies; But the most hard-working and busy people are the first to recommend Zheng Qian and Zheng Yizhi.

The defenders on the city walls can be rotated in three shifts; But the commanders who are responsible for commanding the defense of the city and stabilizing the morale of the army are only the two of them. After Zhou Chang'an was replaced by him, he could also find a weak city wall to take a temporary rest; But after Zheng Junshi was replaced, he had to walk down the city wall and be responsible for presiding over a series of miscellaneous items such as people's livelihood logistics!

In just three days, Master Zheng seemed to have a serious illness, and even his eye sockets were sunken. However, this fierce battle of willpower between the two sides came to an abrupt end on the fourth day!

Because the new trebuchet sent by Diting, after three days and three nights of research, was finally installed!

This is a giant trebuchet, which evolved and improved from the "home car" described in Qin Mo's fragments. Of course, the only person who can make such changes is Meng Tian, the owner of the Tianji Workshop, who died at the hands of Shen Gui.

Originally, the chariot was an extremely bulky equipment for defending the city. This object is extremely powerful, and the fire projectile fired is extremely heavy, so every time it throws a fire projectile, it will have a strong recoil force on itself. As a result, there are certain problems with the stability of its own structure, the accuracy of the projectile landing point, the overall service life, etc.

Therefore, in the original manuscript of Qin Mo's car, the lower part of this object needs to be buried deep in the earth; As a result, battlefield scheduling is also severely restricted; In addition, it is extremely heavy, and it is also a big problem to assemble and disassemble. In this way, it is indeed not suitable for siege battles.

It's just that Qin Mo's remnants of the ancient book are not oracles, and there is no need to read according to the script. Meng Tian, who is good at mechanical skills, after repeated adjustments and experimental comparisons, finally added six wooden wheels to the second-generation car on the premise of retaining eighty percent of the power. However, there is a certain reduction in accuracy and weight in the slightest; However, it greatly simplifies the difficulty of transportation and improves the flexibility of the frontal battlefield.

Therefore, after his improvement, the second-generation car can also come in handy on the battlefield of the attacking side.

Different from ordinary trebuchets, the second-generation car improved by Meng Tian can not only bring devastating blows to the houses and barracks in the enemy city through high-angle projectiles; It can communicate with low-dispatch projections, and easily penetrate walls below the thickness of four layers.

The thickness of the city walls of Huayu Continent is built according to the geographical location and the scale of the city; Except for some special border fortresses, military towns, and dynastic capitals, it is generally the standard thickness of two, three, and four.

In other words, the double-thickness city wall of Hedong City could not resist the attack of the car at all!

In the early morning of the fourth day, a rain of arrows like locusts and huge stone projectiles with flames were thrown into the city from outside the city. This apocalyptic scene is like a calamity coming and the galaxy shattering, and it also caught the soldiers and civilians in Hedong City off guard.

After some urgent deliberation, Zheng Qian quickly persuaded Zhou Chang'an, and quickly conveyed the order to abandon the city of Hedong and break through to the city of Bingzhou.

In fact, the decision to give up Hedong City is not difficult for Zhou Changan and Zheng Qian. Because since Zhou Chang'an took command, the two armies have been holding each other in Hedong, and more than 30 days have passed. Although the plague that Zheng Qian expected did not spread quickly; But looking at the mountains of corpses and stumps under the city, coupled with the warm climate that is about to enter the middle of summer, who dares to say that Zheng Qian's idea is unfounded?

Therefore, even if the Qin army retreats, this Hedong City will still have to be abandoned, one day earlier and one day later, there is no essential difference. And if the person who is in command of the enemy today is still the unjustly killed Juling Marquis, he may still need to report to the imperial court and wait for the approval of Emperor Tianyou. After all, Zhou Changan is the body of the prince, and before leaving Beijing, he had His Majesty's secret decree and granted him the right to arbitrarily decide on the spot; So he didn't need to make a report for him to give the order to abandon the city.

Now that the enemy army has the help of a chariot that can easily penetrate the city wall, it is at the height of the army. Moreover, Hedong City is an ancient battlefield, and the city walls have been specially reinforced, which is far from being comparable to nearby small cities. In this way, it completely destroyed their dream of dividing troops to garrison small cities along the way and blocking the Qin army's northward march layer by layer.

Therefore, according to the analysis of the current battlefield situation, it is the best choice for the whole army to quickly retreat to the capital of the Three Jin Dynasty - Bingzhou City.

However, although the walls of the city are solid, it may be able to withstand the power of the car; But after these dozens of days of attrition, there are still more than 200,000 soldiers with combat ability under Zhou Chang'an's command; The local strong men who have not yet been evacuated, as well as the lightly and seriously injured and sick, are also as high as more than 100,000.

The distance between Hedong City and Bingzhou City is more than 800 miles. It is a blessing and a curse for so many people to embark on such a long and arduous road to withdraw troops.

However, when Zhou Chang'an convened all the generals under his command to discuss the withdrawal of the army, dozens of generals of various battalions, not only did not raise objections, but even rushed to be the queen of the army! Zhou Chang'an, who experienced the military heart for the first time, personally led the 8,000 elite cavalry of the Tianyou Army to kill from the north gate of Hedong under mixed feelings; And Zheng Qian took the remaining strong men and remnants, under the protection of the army, and began to break through from the south gate with the battlefield space pulled out by Zhou Chang'an with his life.

In fact, the timing of their breakthrough was very appropriate. Since Qin Jun had just received help from his car, he didn't know much about how this new thing was operating; Therefore, in line with the principle of training with battle, they did not immediately launch an offensive against the city wall after the first round of volleys.

When Chen Ziling received a report from Tanma, saying that Zhou Chang'an, the commander of the Northern Yan Army, personally led a team of nearly 10,000 elite cavalry, and after breaking out of the siege from the North Gate, Chen Ziling also did not care.

After all, there was still a steady stream of garrison reinforcements on the city wall in front of him; And the 8,000 elite horsemen led by Zhou Changan are also a trump card in his hand. Now that the Northern Yan Army has made such a move, it must have been frightened by the power of the car, and wanted to find a good opportunity to destroy this batch of new ordnance in one fell swoop.

Chen Ziling and Zhou Chang'an have been facing each other for more than a month under Hedong City. Therefore, according to his habitual thinking, he has forgotten the possibility of Zhou Chang'an abandoning the city.

Moreover, although the Qin army also had cavalry, without the assistance of the black cavalry, most of the rest were sentinel light cavalry, and their combat effectiveness was not strong; So from a practical point of view, they don't have a good way to take this large number of elite cavalry of Northern Yan.

However, if Zhou Changan dares to attack his idea of ordnance, grain and grass, then the 150,000 second-way reinforcements who are full of spirit and waiting for the end will definitely be able to keep all of them here.!

About half an hour later, the western wall of Hedong City was already full of holes; And the city gate, which was covered with the flesh and blood of the remains of the Qin army's soldiers, also fell to the ground with a bang, opening its arms to the Qin army......

Chen Ziling, who was hearty all over, made a declaration of victory in public, and personally carried a war knife and walked into the gate of Hedong City first. However, before he could take a few steps, he was caught off guard by a group of ambush soldiers hiding behind the city gate, and he was almost chopped off his head with a knife!

Chen Ziling, who hurriedly withdrew from Hedong City, hurriedly ordered his soldiers to rush into the city to exterminate the remnants. These people who volunteered to stay in the city to block the Qin army, although not too many, won because they had an extremely strong will to fight. This street battle was fought until the sun was sinking in the west, and the last Northern Yan army hidden in the house was discovered by a search team of the Qin army......