With a sharp night owl's cry, fifty arrows shot out at the same time, breaking through the air and shooting at five Tubo troops like lightning. They seemed to have made an appointment, and took one person with ten arrows, shooting people without horses.

It suddenly became silent again, and the five horses were still running forward, but there was no one at the same time. On the other end of the canyon was where the Tang army hid horses, so naturally someone would stop the war horses there.

"General, this is their letter." A soldier found a letter from the Tubo soldiers who were shot to death. Five of them were sent, and they all had letters with the same content. A soldier who knew Tubo's literature read it to Li Guozhen. This was the order written by Tubo Hexi Governor Lucidian to Shangzhab, the commander of Wuwei, to give up Wuwei and withdraw all the troops to Zhangye.

"General, what does the Tubo people mean?" Xianzhu asked in confusion.

"That means that there are not many Tubo troops in Zhangye. You can send someone to send the letter to General Helou." Li Guozhen immediately waved his hand and said, "First team, second team and third team, go with me to capture the jiao castle!"

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The 100,000 troops that followed Zhang Huan's advance were mainly troops stationed in the Hehuang area and Jiuqu area. The army's logistics supply was located in Baigucheng. On the first day of September, it was at the same time as the army expeditioning to Wuwei in the west, and Zhang Huan's army also marched south.

The terrain of the Qinghai-Tibet Plateau is high in the south and low in the north. The high altitude gives Tubo a natural defense. The strong altitude sickness and difficult journey make it difficult for most troops to reach the center of Tubo. In fact, without the supply from the Jiuqu area, the Tubo army would have reached the end of its strength when it reached the edge of Hehuang and would not be able to compete with the Tang army at all.

It is September now. If Zhang Huan's army can really cross the plateau and reach more logic, it will be December. Under the snow-covered ground, the logistics supply has long been cut off. Even if the Tang army has experienced plateau training, no matter how many people are, they will not be able to compete with the Tubo people who have lived here for generations on the Qinghai-Tibet Plateau. The strong altitude sickness has consumed most of the people's physical strength, just like the Tubo people cannot fight against the Jianghuai people in the river.

Zhang Huan knew more about these than anyone else. Even if he occupied the logic, the Tang army would not be able to stay for a long time. In fact, Zhang Huan had no intention of expedition at all. He led the army to the south with great fanfare, just a fake shot.

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Chapter completed!