Before the next army set out, Xiangong originally planned to hand over half of the Jinrong cavalry to Shen Sheng, but Shen Sheng considered that the upper army might have to face a stronger enemy, so he refused his father's kindness, and he only took two centurians with him in the end. Therefore, the lack of troops has become the most headache for the generals of the lower army; However, after the Xia army occupied Yangcheng, they obtained Darong's army, and this problem was solved.

After Da Rong retreated, the Huo army did not launch an attack on Fox Kitchen, but hurriedly bypassed the city and continued to march; The fox chef pursued Huo Jun, but the other party was not in love with war. Due to the lack of troops, the fox kitchen people could not delay the enemy's movements, so they could only watch Huo Jun leave.

Knowing that the Huo army had moved south, Shen Sheng was very anxious, and he immediately ordered Hu Yan (the younger brother of Hu Tu) to lead all the cavalry of Da Rong to pursue the Huo army with all his might, and he arranged 2,000 Da Rong infantry in Hu Kitchen to increase the defensive strength of the city. After Shen Sheng arranged the above work, he led the army and auxiliary troops to march towards Huo State.

The founding monarch of the Huo State was Huo Shu, the younger brother of King Wu of Zhou. Uncle Huo was deprived of his title and exiled by Duke Zhou for participating in the "Three Prisons Rebellion", but Huo Guo's name was finally retained. The Duke of Zhou also ordered the Huo State to be moved from the Gyeonggi of the old Shang to the current Rongdi mixed land. The terrain of Huo is dangerous, and the city is high and strong. The Huo people and the barbarians have fought for more than 300 years, and they are extremely difficult enemies to deal with because of their rich experience in warfare and strong combat effectiveness.

The Jin army set up camp in the southern suburbs of Huo, and Shen Sheng and Deputy Marshal Rick went around Huocheng to check the terrain. After returning to the barracks, both of them felt a great headache: Huocheng was built on a high ground, protected by two wide and deep trenches; The two ends of the trench are connected to Fenshui, and the bottom is filled with sharp piles. Water could be brought in from the northeast corner and then flow back to Fenshui from the southeast corner, but the Huo people closed the sluice gates at the entrance and exit, so there was no water in the trenches.

Between the entrance and exit was a high embankment, the upper part of which was full of defenders to defend against attacks from the river. Between these two lines of defense were a number of small but strong forts, which were small rammed-earth platforms with shacks that could accommodate a dozen soldiers. Under this defensive system, the enemy army cannot carry out surprise attacks.

On the other hand, the Huo people also looked quite shocked when they saw the Jin army, because the Huo people didn't know about the expansion of the Jin State at all, and thought that all the Jin troops were besieging the Geng State. "If the Jin army is here, then what is going on with Geng Guo being besieged? Could it be false information? And Da Rong, who has always been an enemy of the Jin State, has also joined the coalition army, what kind of tricks are the Jin people playing? They thought so, and they couldn't figure it out.

After the Jin army set up camp, they began to build fortifications outside the trench, and people built a wall around the trench and several watchtowers at the same time. The Huo people missed a rare opportunity during this period, because they could attack while the Jin people were not firmly established; Since they really couldn't figure out the details of the coalition forces, they just watched the enemy finish the fortifications without taking any action.

After a heated discussion, Shen Sheng and the generals formulated a siege plan.

The Jin people first used the link between the ditch and the north of Fenshui as a breakthrough. They planned to destroy the fortifications there, and then bring Fenshui into the outer trenches so that the army could cross on rafts, and although the Huoren Gaotai fortress was strong, it was too small in size, and it was estimated that each Gaotai could be dug up in one hour with three moving pheasants. If dozens are built, the first line of defense can be broken through in two or three days.

The Jin people immediately began to act. The Huo people mobilized some troops to strengthen the outer trench defenses, and Shen Sheng was very happy: if the two armies were mixed together for hand-to-hand combat, the archers on the fortress would be able to throw rats.

The Jin built rafts and siege engines in the jungle behind the barracks so that the movement would not be detected by the enemy. When all the necessary tools were made, the Jin people transported them to the designated place at night.

The Jin attacked first from the south, and the offensive was carried out on a long front, and the Huo people had to bring in troops from other positions to strengthen the defenses. As a result, the defense line in the northeast corner became weak.

The Jin army, which was lying in ambush near the northeast corner, saw that the enemy was in a plan, and immediately swarmed up, repelled the defenders with a dense rain of arrows and a large number of throwing guns, and captured the target in a short time. The soldiers immediately opened the floodgates, and the Fen River was flooded in, filling the trench in a few moments. With the sluice gates in the southeast corner still closed, the north-south drop caused the river to overflow the surface, flooding the ground beneath the defenders' feet and quickly rising to chest-high heights. Because the Jin had built a sloping wall on the outside beforehand, their position was not flooded.

When the Jin vanguard saw that the water was rising, they threw the raft into the water and crossed the enemy's defensive line. At first, the Huo people were barely able to stand, but soon began to drift with the current, and eventually they were washed up on the embankment (inside) of the river, whether they were dead or alive. The Huo people on the embankment fished up their companions in the water and opened the floodgates, and as a result, many people were washed into the Fen River, and the Jin people also rushed in front of them.

The Jin people in the northeast received the order to close the sluice gate again, the water level gradually dropped, the Jin army vanguard lowered the suspension bridge, and the large army of the coalition army drove into the first line of defense of the Huo State.

However, the Huo people still relied on the fortress to put up stubborn resistance, the archers on the fort tried hard to shoot the enemy, and the infantry on the ground resisted valiantly. The attacker raised his shield to form a turtle formation to fend off attacks from above; The battle on the ground was relatively smooth, and the soldiers quickly eliminated the stubborn enemy. The army then pushed the siege engines over and began to dig into the corners; Others built defensive lines on the outside of the moat to prevent raids inside the city.

When the east is whitening, the soil outside the pheasant is getting higher and higher, the foundation of the rammed earth wall is almost hollowed out, and the fortress is in danger of collapsing at any time. Seeing this, the defenders of the fort could not bear the fear of their own death, so they threw down their weapons and surrendered.

The Huo people could not hold out, relying on the tall and strong city walls to resist the enemy's attack, and the siege operation was simply in vain. Now that it was the turn of the Jin people, an urgent military report that came later prompted Shen Sheng to decide to retreat immediately.