In the next few days, Liaodong City continued its battle. It had attacked the city several times, but was counterattacked and the city was still not broken. Both armies suffered heavy casualties. However, the defending side had a advantage in the advantage of geographical advantage. With the whole army's fighting spirit, the casualties of the siege would undoubtedly occur several times.

The Sui Dynasty was a completely cold weapon era, and black gunpowder had not been developed yet, so in the war, there were swords, guns, swords and halberds.

Luo Zhaoyun has secretly started to collect various raw materials and even explore mineral materials. However, he sent people separately to search for them, without expressing his intentions, and the formula is even more unlikely to be leaked. He did not only have detailed black gunpowder formulas, but only roughly saw from the Internet that one nitride, two charcoal and three sulfides, which need to be developed specifically at that time.

He didn't say the gunpowder, it was his own selfishness. That thing was a killing weapon. If the cannon was made, Emperor Yang of Sui would be full of confidence when he had it, and he would probably do something more arrogant.

Once that kind of firearm technology spreads, the world will be in chaos in the future and all the troops will have explosives. Wouldn't it increase its hostile strength and lose its miraculous effect?

The city of Liaodong was extremely solid, and with the rigid strategy of Emperor Yang of Sui, the Sui army stagnated here, delaying the fighter's opportunity.

The tenth date has arrived, but the city has not been broken, with huge casualties, which has somewhat shaken the morale of the army.

Emperor Yang of Sui was thunderous and ordered a large army from all sides to attack day and night. In the end, the Goguryeo army in the city was outnumbered and exhausted from fighting, and finally could not hold on. At night, Yizhi Wende rushed out with a group of people and fled to the camp on the east bank of the Yalu River.

The Sui army finally conquered the Liaodong city, but after entering, it was found that it was full of holes. Many houses near the city were smashed by catapults, and wooden rafters were demolished by Goguryeo soldiers for use in defense of the city. There were many refugees on the streets, and they were mourned everywhere and suffered the consequences of the war.

Before Yizhi Wende escaped, he sent people to burn down the remaining granary and arsenal, leaving no available equipment for the Sui army, and there were few poor people of tens of thousands of households.

Emperor Yang of Sui distributed some food and grass to the people here to show his positive image of suppressing the people of the people and helping the Liaodong people escape from suffering. In this way, the food and grass in the army became more compact.

The Sui army was stationed for three days and sent some troops to attack some nearby counties and towns. The main army continued to advance eastward to attack the next fortress ferry.

This area has undulating mountains, dense jungles, sparsely populated areas, more deserted land, and very rich original ecology.

A wide and turbulent Yalu River is more steep than the Liaoshui terrain, but the fortifications on the other side are more complex than the northeastern coast of Liao. The earthen fortress has also been replaced with a stone wall fort, which is thick and wide. It is located across the other side of the Yalu River, at the Xiongguan Pass, and the city walls are winding, connecting the mountains and ridges, directly blocking the Sui army's route to advance eastward.

Behind the stone castle is the Wende Camp of Yizhi, which has garrisons of 100,000 troops. Most of the main forces of Goguryeo are, which are more powerful than the mixed defenders of Liaodong City.

"After crossing the Yalu River, it is the local land of Goguryeo, only 500 miles away from Pyongyang City."

"Congratulations to Your Majesty, we have already won one-third of Goguryeo." Yu Shiji said with a flattering look on his face.

Yang Guang's face was gloomy and he was not in a good mood. He formally sent troops in mid-August. Now he has fought fiercely and marched for a month, and he has only taken down one-third of his territory. Moreover, these one-third were originally dependent on the territory of Northern Qi during the Northern Qi period, not the original territory of Goguryeo.

"In ten days, the enemy camp on the other side of the Yalu River must be taken down!" Yang Guang issued a death order because he originally thought that he would fight to the city of Pyongyang in two months, causing King Goguryeo to surrender, but now it seems that the process is very tortuous.

"Dongdongdongdongdongdong!"

The warships continued to cross the river, and the Sui army and the Goguryeo army staged a battle to cross the river again.

The river water in September of the lunar calendar, especially the tributaries of Changbai Mountain, is rainy between the mountains and ridges, and the river water is already cold. Many of the Sui army that fell into the river were shivering, and their combat power was reduced a little more than before.

On the contrary, this cool autumn environment was adapted to by Goguryeo soldiers, so the war between the two sides increased, which was even more unfavorable to the Sui army.

After several days of battle, more than a dozen Sui troops took turns to fight, but none of them conquered that line of defense.

The solemn and murderous spirit on both sides of the straits, killing those who cross the river with revenge.

"Your Majesty, General Duan Wenzhen has passed away."

When Emperor Yang of Sui heard the news, he was a little worried. Duan Wenzhen was the Minister of War. This time he was the general manager of the Nansu Road marching, responsible for the transportation of grain and grass along the way, and also dispatching matters. He went from Beiping County to Huaiyuan Town in western Liaoning, and then transported from Huaiyuan Town to the Yalu River at present. The 6-long duration is very long and important people need to be responsible. Otherwise, if something happens to the grain and grass, the consequences will be unimaginable.

"General Duan worked hard for the country and sacrificed his life on the battlefield. It is worthy of admiration. He should be buried with great pleasure and posthumously awarded him the title of Guanglu Dafu, Shangshu Youpushe, the Marquis of Beiping, and the posthumous title of Xiang!" Emperor Yang of Sui valued Duan Wenzhen very much, and he also made great efforts in his fight for the throne, so he was considered one of his confidants.

"Your Majesty, please feel sorry for your grief. General Duan's departure may be re-appointed." Su Wei said from the side.

Emperor Yang of Sui nodded, and knew the importance of food and supplies behind them. As the divine light flashed, he saw Luo Zhaoyun's figure and felt aroused in his heart. At the critical moment, he felt that he had activated Luo Zhaoyun, who was temporarily placed in front of the imperial court, and took on this important task. (To be continued.)
Chapter completed!