The Yili River Valley, like the Suiye Basin, is a pearl among the mountains. The Yili River runs from east to west and is hundreds of miles long. On both sides of it are endless pastures and large coniferous forests, and in the distance are the snow-capped mountains. During its thousand-year history, the Yili River Valley has always been a treasured land coveted by countless nomads due to its humid climate and rich and vast pastures. Serbs and Usu people mainly live here, but they are relatively weak and have always existed as dependents. During the Kaiyuan Tianbao period, this was the headquarters of the Tuqishi people. They drove away the Serbs and Wusu people and occupied the entire Yili Valley. In the early years of Tianbao, the Tang army defeated the Tuqishi people, recaptured Suiye, and also recaptured the Yili River Valley, making the Suiye Basin, Suiye River Valley and Yili River Valley integrated into one, especially the Yili River Valley was the gateway from Beiting to Suiye Valley. Ye's strategic channel was extremely important to the Tang army. The Tang army built Gongyue City in the Yili River Valley and stationed 300 troops to guard the river valley. The Sai and Wusu people who had been driven away returned to live in this rich land. In addition to the Sai and Wusu people, there are several smaller Tuqishi tribes, which no longer threaten the Tang army's control of the Yili Valley. Li Ye, the governor of the river, agreed that they live in the west of the Yili Valley and in the east. After stuffing it in, the Wusu people will live in peace. However, the Geluolu people of the Pogo tribe living in the north have been eyeing the Yili Valley. However, they were frightened by the Tang army and did not dare to take any action. However, the Geluolu people were not willing to give in. They had been patiently waiting for the opportunity. The capture of Suiye City made the Geluolu people see an opportunity. They believed that the Tang army had lost power in the river, so they did not hesitate to seize this opportunity and send troops to the Yili Valley. The Creeping Geluolu Khan was called Shaya, and he was the fourth uncle of Jinshan Ling. He actually usurped the throne from his nephew. The year before last, he led his army to fight against the Jinshan Geluolu tribe. As a result, both sides suffered losses and retreated back to Xuanhai. Shaya was eager to regain his strength. The fastest way for the nomads to regain their strength was to annex other small tribes. This time he occupied the Yili Valley and annexed three small Tuqishi tribes, and his strength was somewhat restored. But Shaya did not sit back and relax. He was watching the movement in Beiting. If there was no movement in Beiting, it would mean that the Tang Dynasty acquiesced to his occupation of the Yili Valley. That morning, Shaya Khan suddenly received news from spies that a Tang army of tens of thousands was marching toward the Yili Valley. This shocked Shaya and hurriedly ordered the gathering of troops. The eldest son Kuntli quickly advised: "Father, there are tens of thousands of people in Beiting. They are not necessarily coming for us, they should just be crossing the border to break leaves!" Shaya Khan thought about it and it made sense, but he didn't dare to be careless. What if the Tang army destroyed them directly? At this moment, another soldier came to report, "There is a letter from the Tang Army. It is a letter from the Governor of Beiting." The soldier presented the letter, and Sha Ya read it. His face was really ugly, and he said to his eldest son: "Li Fei Shouyu asked us to retreat back to Xuanhai immediately, otherwise he will directly lead his army to attack us!" The eldest son Kuntli was a little scared and said to his father: "It is better to retreat north temporarily, and then send people to Chang'an to ask the Emperor of the Tang Dynasty to allow us to graze cattle in the Yili Valley!" Shaya Khan sighed, "We didn't send anyone to congratulate the Emperor of the Tang Dynasty on his accession to the throne. How could they agree to our request at this time?" The second son Sabat said: "Father, the relationship between Ge Luolu and the Tang army was so good in the past. Li Ye did not allow Ge Luolu to get involved in the Yili Valley. It is even less likely to agree now. We must either fight with the Tang army and defeat them. Completely occupy the Yili Valley, or retreat to the Xuanhai and completely give up on the Yili Valley!" Shaya Khan shook his head, "How can you spit out the fat that reaches your mouth?" "Then let Hao'er lead the army to fight them. If Hao'er fails, it will be too late for Father Khan to lead his people back to Xuanhai." Shaya Khan thought for a long time and finally nodded. How would you know if it doesn't work if you don't give it a try? He warned: "Don't fight hard with the Tang army. Try it out. If it doesn't work, retreat immediately. To ensure the safety of the main force, we still have to
To be continued...