In order to show loyalty to Li Yu, Ah Fan vomited in addition to offering his henchmen to guard the cities of Ah Zhuzhen, Seng Liang, and Mai Xiao. The www.biquge.info of the pen "Qu" proposed that Silla should not know about the surrender of his army, and send his troops to deceive the important towns of Cheorwon, Qiju, and Bukhansan, so that they could easily take the cities on the first line of the Imjin River in the northern border of Silla, and the Tang army could then go down the Imjin River to the Hansan River, and then go up the Hansan River to take the fortress of Gunwon.

To this end, Ah Meal Datu presented a map of the entire territory of Silla, and compiled all the troop deployments and defensive weaknesses of each important town in Silla along the route into a book and presented it to Li Yu.

With the information of Ah Fan Datu, the Tang army's attack will undoubtedly be much smoother, and Li Yu rewarded Ah Fan Datu with a thousand amounts of gold, and promised 5,000 acres of fertile fields in the area of Silla Jincheng.

In order to prevent and control the delay for a long time, the news of the surrender of the army led by Ah Shan Datu was transmitted back to Silla, making it impossible to carry out the fraud of the city.

On the second day, Li Yu ordered the armies to march out, and strive to capture all the Silla cities along the Imjin River within 10 days.

The Tang army entered the Imjin River eastward according to the plan, and opposite Duogu City, the two city guards of Niu Yu and Shuigu on the east bank of the Licheng River had already been replaced by their own people, and the Tang army led the army to surrender as soon as they arrived at the two city guards.

The Tang army appeared under the city of Ajizhen in only two days through the mountain range between the Licheng River and the Imjin River, and the general of Ajizhen was originally the general of the Ayu Datu Department, and the Ajizhen Datu personally entered the city to persuade him to surrender.

After that, Ah Dian Datu ran non-stop to the city of Seng Liang dozens of miles away, and when Zhang Shi led the army to the city of Seng Liang, Ah Meal Datu led the whole city of Silla soldiers out of the city to surrender.

The Tang army triumphantly marched all the way to the Imjin River, and went down to Silla Shucheng without a fight along the way, which made the hearts of tens of thousands of soldiers extremely high.

At this time, Li Shangdan completely annihilated 20,000 troops of the Silla South Route Army on the west bank of the Licheng River, except for Pinri, Liu Shijiang beheaded the Silla general Wenzhong, and with the help of the Yellow Sea Fleet, crossed the Licheng River and the Hanshan River, and conquered Dongbi and Xuekou Cities, which pushed the already high military morale to a higher point.

The guards and soldiers were all happy, and they were full of ambition to prepare to fight all the way south along the Linjin River to Kuniyuan Castle, and strive to end the war at the end of the year and go home.

However, at this time, Li Yu took the black tooth Changzhi as his commander, and led the Jiaolong Army Qu Tu Zhongxiang, the Turtle Wei Li Yexu, Bai Zewei Li Shangdao and Bi Fangwei Gao Chongli as a partial division to continue to advance eastward. He captured the counties of Axe-heung, Akagi, Golian, Bere, Quanjeong, Hu-hyung, Dorin, and Dahu in the northeastern area of Silla, and then went south along the east coast of Silla, capturing the counties along the way and joining forces with him at Geumseong.

He led the rest of his troops and horses south along the Imjin River, captured the cities along the way, and went to Xuekou City to join Li Shangdan.

Ah Fan Datu was ordered to lead 3,000 soldiers and horses to pretend to be defeated and go to Tieyuan City, Zhang Shi was the first to meet, and led Yanyun and Beihai Iron Cavalry 6,000 cavalry to follow.

The defender of Tieyuan City saw Ah Shan Datu lead the defeated soldiers to flee to the city, and opened the city gate to let him enter the city, wanting Ah Dian Datu to lead his soldiers and horses to assist him in defending the city. After all, most of the elite in the city had already gone to the north with Jin Yuanshu, and the defenders in the city did not exceed 4,000, and more than half were still old and weak. Listening to what Ah Fan said, the 80,000 troops of the Northern Expedition were wiped out with the whole army, and the 30,000 reinforcements under his command were also defeated and scattered, and the 50,000 Tang Army captured the city of Shengliang, and the Japanese soldiers came to the city that day.

The guard general was very panicked, he turned out to be just a member of the Tieyuan City general, and the main general went with Jin Yuanshu to the north, so he temporarily took the post of the guard of Tieyuan City. Hearing that the Tang army was coming, the whole person was left without a master, and he knelt down and begged Ah Fan Datu to stay and guard Tieyuan City, and hand over the military power to him.

Ah Yu vomited and said embarrassing things on the surface, and wanted to go back to Jincheng to invite Sin Yun to go, and after some excuses, he took over the military power of Tieyuan City from the hands of the guards, and then planted the 3,000 soldiers and horses he brought in the west gate of Tieyuan City.

That night, the West Gate was ordered to be opened by Ah Dian Datu, and Zhang Shida, who had been waiting behind, was overjoyed and waved his army into the city.

The Silla army in the city didn't know why the Tang army was killed so quickly? I don't know how they got into the city? The unprepared Silla army was killed by the Tang army that rushed into the city and fled, and the guards heard the shouts of killing in the city, put on their clothes and armor and went out without knowing the situation, and were beheaded by a Tang military captain, and fell to the street in a daze.

Cheorwon Castle, an important town operated by Silla for several years, was so easily conquered by the Tang army, but when Ah Fan Datu led his army to Sevenfold Castle and concocted it again, he was recognized by the defenders of Sevenfold Castle, almost killed, and fled back to the Tang army in embarrassment.

Zhang Shi hated it and waved his army to the city, intending to attack the city, Li Wenbai hurriedly dissuaded: "Our army is cavalry, and we are not good at attacking the city, so we should wait for His Highness to lead the army to arrive before making a decision." ”

Zhang Shi had no choice but to shoot an arrow at the Sevenfold City with hatred, and an arrow shot a general next to the defender on the castle tower, which frightened the Silla army in the city. The guard looked at the Tang army slowly leaving the city with a blue face, ordered the whole army to strengthen the city defense, and wrote a report on the Tang army of the king of the Tang army to the seven-fold city, and all the cities in the upper reaches of the Imjin River were destroyed by the Tang army.

Li Yu, who received Zhang Shi's report, not only regretted that he failed to open the gate of the Sevenfold Castle, but also expressed regret to the Silla soldiers in the city.

Xue Jun thought that Li Yu was sorry for Ah Yu's failure to deceive the Sevenfold City, and persuaded him: "Your Highness, our army has fought too smoothly all the way, and a little setback can keep the officers and men of the whole army immersed in the joy of victory sober-minded, so as not to become an arrogant army and underestimate the enemy and lead to a big defeat." ”

Li Yu smiled, "Xue Sanyang, I don't sigh for failing to open the city gate, but for the Silla army in the Seven Castles who don't know whether to live or die!" ”

"I have brought a hundred stone throwers specially prepared for the siege of the city, thirty stones that can throw a hundred catties of boulders, and two hundred pours of fierce fire oil, can the small seven-fold city withstand the blow of this king?"

Li Yu led the main force to the foot of the Sevenfold Castle and implemented the strategy of encircling three and missing one, so that Xue Ne led the cavalry to ambush outside the south gate of the Sevenfold Castle.

Because the north of the Sevenfold City faced the Lulu River, it was not suitable for a large army to attack the city, so Li Yu placed the main attack direction at the east gate of the Sevenfold City, and lined up the stone throwers outside the city in three columns.

Li Yu ordered the marksman to shoot an arrow tied to the city tower with a letter of persuasion, and turned to ask Ah Yu Datu: "Who is the guardian of the Sevenfold City?" ”

Unable to deceive the Sevenfold City, Ah Din, who was deeply disturbed, hurriedly replied: "Go back to Your Highness, Xiao Shou Rudong." ”

Li Yu asked again: "What is the record of this person among the Silla generals?" ”

"Xiao Shou Rudong can be called a good general of Silla, who has guarded the Seven Castles for more than ten years, and has repelled the attacks of the Goguryeo army several times, and has won a lot of victories."

Li Yu was a little puzzled, "Since he is a tiger general, why didn't Jin Yuanshu bring him with him?" ”

"Because Jin Yuanshu was at odds with Xiao Shouru Dong, he did not transfer him to the expedition." Ah Yu vomited and then thought, "However, although Xiao Shou Rudong did not go on the expedition, all the elite soldiers in the Seven Cities were transferred by Jin Yuanshu and annihilated by His Highness. At present, there are only the old and weak in the city, and in the face of the hundred battles under the command of His Royal Highness, the little guard Ru Dong will not surrender, and he will only be captured by the head. ”