Li Ke, the king of Lingnan, led an army of 120,000 troops under Duan Zhixuan, Duke of Fanguo, and Chai Shao, Xianggong of Qiaoguo, and after quelling the rebellion in Jiaozhi County, he launched an attack on Linyi State, inspired by the victory in the Persian region and the Korean Peninsula.

Li Ke was very smart, and before the start of the operation, in order to let the Tang army adapt to the tropical rainforest climate of Linyi Kingdom, he specially conducted adaptation training for up to three months in the tropical rainforest area of Jiaozhi County, and made full material preparations.

At the beginning of the war, the Tang army was progressing smoothly, and the Linyi army was almost powerless, and the Southern Expeditionary Army quickly attacked Wencheng, which was only less than 200 miles away from the capital of Linyi State.

King Linyi personally led an army of 30,000 and fought a decisive battle with the Tang army in the northwest of Wencheng.

Li Ke personally commanded the front line, preparing to annihilate the enemy army in one fell swoop.

The Tang army had an advantage in strength and weapons, Li Ke commanded the Chinese army, Duan Zhixuan was on the left, Chai Shao was on the right, and 80,000 troops launched a fierce attack on the Linyi army.

Just when the Tang army entered the enemy formation and the Linyi army was about to collapse, a hidden elephant army was suddenly killed from the Linyi army.

5,000 elephants carrying 10,000 Linyi troops, crushed towards the Tang army, the Tang army had never seen this kind of formation, many war horses from the north were frightened at that time, many officers and soldiers were also panicked, and the Tang army's queue was chaotic.

The elephant troops like tanks were rampaging through the ranks of the Tang army, and the Linyi army on the back of the elephants was condescending, with arrows and spears, and the Tang soldiers turned on their backs. King Linyi led other troops to take the opportunity to chase and kill, and the Tang army was defeated and suffered heavy losses.

The Tang army retreated for more than 200 miles before it stabilized its front, and could only temporarily stop the conquest of Linyi.

Li Ke is very smart and good at learning, he visited the local people, and also looked through historical materials, and got some useful information:

In the two conflicts between the Southern Dynasty and the Sui and Linyi, the other side used elephants. Once in May of the 23rd year of Emperor Yuanjia of the Southern Song Dynasty (466 AD), the Song Dynasty Jiaozhou Assassin Shi Tan and Zhi were ordered to cut down Linyi, and Fan Yangmai, the king of Linyi, used the elephant army to participate in the war, and the Song army was unfavorable in the initial battle. Zhenwu General Zong Wei believes that all beasts are afraid of lions, and elephants are probably no exception, so he drove many fake lions to hide in the grass. He also dug quite a few traps around the predetermined battlefield. The enemy drove the elephant army to attack, Zong Wei released a fake lion, the elephant was so frightened that he turned around and scurried, Zong Wei took the opportunity to command the soldiers to release ten thousand crossbows, the frightened elephants ran around, many fell into the trap, and both people and elephants were captured alive.

Another time was at the end of Renshou of the Sui Dynasty, Liu Fang was sent as the head of the state road march to fight Linyi, Linyi Wang Fanzhi fought with a giant elephant, Liu Fang used deception to lead the elephant into a trap, and then set up a kill with a bow and crossbow, so as to win and capture the capital of Linyi in one fell swoop.

Based on these information, Li Ke found a way to deal with the troops of the Linyi National Elephant Army. After a period of preparation, he led a large army to attack the country of Linyi again.

However, at this time, it was the continuous rainy season, and the Lin Yi army destroyed the road, and the Tang army's baggage transportation was difficult, which slowed down the progress of the army. At this time, due to the humid weather and mosquito bites, the plague suddenly broke out in the Tang army, and the Tang soldiers vomited and diarrhea, and their bodies were weak.

Li Ke had no choice but to ask Chang'an for help.

When Li Chengqian learned of the news, he immediately summoned Liu Quanzhong, the director of the big hospital, and Liu Quanzhong said that the big hospital could do nothing about it. So Li Chengqian sent someone to invite Sun Simiao again, but Sun Simiao was also stumped.

Sun Simiao suddenly remembered Li You's parchment scroll, which might have been recorded in it, so he recommended Li You again.

In fact, when Li Chengqian saw that everyone had no choice, he was not worried in his heart, and he had already remembered the magical Li You.

Li You was passed to the Liangyi Palace.

After Li You read Li Ke's letter asking for help, he simply searched on the science and technology library, and he already had a solution. However, he did not express his position immediately, but said that he would wait until he had gone back and read the parchment.

After Sun Simiao and the others left, Li You said to Li Chengqian: "Big brother, this matter is not difficult, I have seen a similar recipe for treating this plague on the parchment scroll. However, I have an idea I would like to discuss with my eldest brother. ”

Li Chengqian was very happy when he heard Li You say that there was a way. He smiled and said, "Fifth brother, I know that this matter will not be difficult for you." The plague in Chang'an City was also cured by you. If you have anything to worry about, let's hear about it. ”

"Big brother, the southeast region is very important for the future development of Datang, Linyi itself is an important coastal area, and the national capital Zhancheng is an important port city, which has an important strategic position.

The third brother was frustrated in his first expedition, and the eldest brother must vigorously support him to avoid dampening his enthusiasm for making contributions.

This cure for the plague that occurred in the Linyi Kingdom, it is best not to let him know that it is from my own hand, which will make him feel discouraged. ”

Li You's worries are justified, Li Ke's temperament is arrogant, and he has always been conceited about his intelligence, and when he saw Li You's achievements overseas, he took the initiative to ask Ying to guard the southeast for the imperial court.

After the attack on Lin Yiguo was frustrated, his mood had been hit to a certain extent, and compared to Li You's impressive achievements again and again, Li Ke was already a little discouraged. If he knew that he could only solve the problem by relying on Li You's methods, his heart would definitely be twisted.

Li Ke is the commander of the Tang Army in the southeast, and if he fights with this mentality, it is not good news for the Tang Army.

Moreover, for Li You, what he is worried about now is not how to make meritorious contributions, but that his own merits are too great and too great, and he is unwilling to get this honor of curing the plague again.

Li Chengqian appreciated Li You's attitude of not caring about personal fame and fortune and wholeheartedly serving the interests of Datang. In the past, Li Chengqian would have wished that Li Ke had failed to see his jokes. But now his status as the crown prince has been very stable, and his open-mindedness and pattern of looking at problems have risen to a certain height, and he can also think about problems from the overall situation of the imperial court.

He said: "Fifth brother, you have considered it right, how do you plan to deal with this matter?" ”

Li You said: "I'm still a little embarrassed, and I can't think of how to deal with this matter for a while? ”

Li Chengqian said: "Let's just say that the divine doctor Sun Simiao came up with a solution, isn't it okay?" ”

Li You shook his head and said, "I'm afraid this won't work." With Mr. Sun Simiao's character, he would never take this credit. ”

Now Li Chengqian is also in a dilemma.