"Knock knock knock~" With a burst of passionate war drums, Cheng Yanjin led 20,000 troops out of the camp gate, and went straight to the bottom of Anshi City to line up the array, and the head of Anshi City was already full of guards, Yang Wanchun personally supervised the battle on the city gate, and the first real siege battle between the two sides was about to break out.

"Mao Gong, do you think Zhixing will build Anshi City in a few days?" On a high ground far away from the battlefield, Li Shimin rode a horse and looked at Anshi City in the distance, and then asked Li Ji next to him very easily.

"Hehe, although Brother Cheng boasted that he could take Anshi City in three days, but judging from the performance of Anshi City last time, the other party's guard is also a person who is good at defending the city, so I think he may need to spend a few more days before he can break through Anshi City!" Li Ji also smiled at this time.

Last time, Li Shimin asked his generals who dared to lead their troops to attack Anshi City, but Cheng Biting Jin was the first to jump out and promised to take Anshi City within three days, but Li Ji and Li Daozong and others were unwilling to give up this opportunity, so several people fought, but in the end, Cheng Biting Jin pressed a few of them as the main general, and Cheng Biting Jin won the task, which made Li Ji and others quite unconvinced.

"Three days is indeed a little less, and I also feel that Zhijie is underestimating Anshi City this time, and in my estimation, it will take him at least ten days to conquer Anshi City." Li Shimin also nodded when he heard Li Ji's words, and then spoke again, the expression on his face was still very relaxed, although ten days was a little longer, he still believed that it was a matter of time before Anshi City was conquered.

Hearing the conversation between Li Shimin and Li Ji, Li Xiu next to him sighed secretly, thinking that they and Cheng Yanjin were too optimistic, although history has changed now, but Anshi City is not so easy to fight, I'm afraid Cheng Yanjin will have to suffer a loss this time, but this is good, at least it can defeat some of the arrogance in the Tang army.

With Cheng Biting Jin's order, the assembled Tang army slowly approached Anshi City, the siege vehicle was in front, and the crossbowmen were behind, the Tang army's weapons were well-equipped, and the range of the bow and crossbow far exceeded that of Goguryeo's bow and crossbow, but now Goguryeo is condescending, and it immediately offset the disadvantage of the weapon, and the two sides entered the range of the bow and crossbow almost at the same time, and for a time the bow and arrow flew all over the sky, but because of the protection of shields and armor, the casualties on both sides were not very large, and even if they were injured, they were generally not fatal.

However, when the real siege began, the casualties immediately increased greatly, countless Tang soldiers braved the rain of arrows and rushed forward desperately, from time to time someone fell on the road full of arrows, and when the siege vehicles and ladders finally pushed to the bottom of the city, the Goguryeo people at the head of the city began to throw fire oil bottles downward, and after a while, the siege equipment became piles of torches, which could not be used at all, and the city also threw down rolling logs and stones from time to time, and the Tang army did not dare to approach at all.

Seeing that the defense on the head of the city was so tight, no matter how brave the Tang army was, it couldn't let the soldiers stay under the city and die, so in the end, Cheng Yanjin had no choice but to let people retreat, and then mobilized equipment to prepare for the second siege of the city.

Siege warfare is different from field warfare, the two sides of the field will concentrate all their forces and start a decisive battle with the enemy, which generally does not last too long, but the siege war is a tug-of-war, the two sides compete not only for the morale and quantity of the army, but also for the competition of materials and coordination capabilities, for example, now Cheng Biting Jin's first siege is not smooth, it is easy to be beaten back, but he quickly organized a second siege, in order to consume the materials for the defense of Anshi City, after all, these things such as fire oil, rolling wood, and stones are not infinite, Some can be consumed every time you siege the city, and sooner or later there will be a day when there will be light.

Cheng Biting Jin fought this idea, so the first few offensive failures did not shake his confidence at all, although Datang is a labor expedition, but the materials are far more sufficient than Anshi City, not to mention that they also captured a large number of materials before, and let him have no scruples when attacking the city, the siege equipment was burned, so let the craftsmen hurry up and make a batch.

However, in this way, the siege war became very boring, the Tang army almost repeated several steps such as attacking, blocked, and retreating, and the casualties were not large in one day, but there was no progress, just to consume a large number of materials in Anshi City, for example, on the second day, Li Xiu found that Anshi City no longer used fire oil as wantonly as on the first day, but only at the critical moment, it would use fire oil to burn the Tang army's siege equipment, which also showed that the fire oil reserves in the city were not much.

In fact, the material preparation in the city of Anshi is still very sufficient, but no matter how sufficient the materials are, it can't withstand the repeated attacks of the Tang army, and it is clear that the materials in the city will be consumed, which makes Yang Wanchun also have to give an order to save every cent of materials, after all, it is only summer, and it will take at least three or four months before Liaodong becomes cold, with the materials in the city, I am afraid that he will not last so long, but even so, he does not plan to give up, after all, defending the city is not just about fighting materials, holding on to the end, It is the will and determination of both sides to fight.

The continuous attack has made the material consumption of Anshi City extremely large, even if Yang Wanchun no matter how much people can save, but by the third day, the most important oil has been consumed, and there are not even many rolling wood and stones, so Yang Wanchun has asked people to demolish some useless buildings in the city, and the bricks and stones that have been demolished again are transported to the city for backup.

However, in comparison, the fire oil is a greater threat to the Tang army, after all, the siege equipment is wooden, so it is also the most afraid of fire, and now that the fire oil is gone, the biggest threat to the Tang army is one less, which also makes Cheng Yanjin finally feel at ease and boldly attack the city, and he promised Li Shimin before that he would capture Anshi City within three days, and today is also the last day.

"Knock knock knock~" With the sound of tight war drums, another round of siege warfare is about to begin, Li Shimin, Li Xiu and others also came to the battlefield again to fight outside the battlefield, after all, this is the real siege battle of Cheng Biting Jin, and whether Cheng Biting Jin can fulfill his promise is also a matter of one move, but Li Xiu is also very nervous at this time, because he always feels that Cheng Biting Jin may suffer a big loss.

"Kill! Kill! Kill! With Cheng Bitingjin's order, the soldiers who were attacking the city in front also burst out with an unparalleled morale, shouting to kill Anshi City, and on the opposite side of the city, the Goguryeo soldiers were also in full array, and they all knew that the next step would be the moment that would determine their life and death, and if they wanted to survive, they must repel the Tang Army when they were short of materials!