One hundred and ten miles south of Qingxiguan is the state boundary between Li and Xizhou. Guīzhou is also the most southwesterly state of Jiannan Road.

The post road runs from the state boundary to the south throughout the entire Sizhou territory, passing through Xin'an City, Yong'an City, Sanfu City, and Shaye City (today's Xichang). There is a post road to the south - this is another important military station. It was presided over by Li Deyu during the Taihe period. Build.

Thirty miles south of Shaye City is the military town of Jiangmosu, and another 120 miles to reach Yangpenngling. After crossing this mountain, there is Guanyi Station at the southern foot of the mountain. The location of this Guanyi Station is the dividing line between Tang Dynasty and Nanzhao after the Anshi Rebellion. .

From the south of the Dadu River to Yangpenngling, a total of more than 750 miles, it was still under the very stable rule of the Tang Dynasty until the Taihe period of Emperor Wenzong of the Tang Dynasty. Li Deyu and Wei Gao built fortresses here to garrison soldiers and horses for defense. It's not Nanzhao, it's mainly Tubo.

Since the late Tang Dynasty, the country's power has been weak, and most of the barbarians in this area have defected to Nanzhao, and a lot of land has been lost.

After Gao Pian defeated Nanzhao, he restored the borders in one fell swoop. However, the local fortifications were in dilapidated condition and the people fled one after another, making it increasingly difficult to garrison troops. Once the garrison was reduced, it would be difficult for you to suppress the barbarians and control the land.

It's okay if they don't cause chaos, but once they do, they often attract the Nanzhao army, which is very troublesome.

Historically, when Dachanghe State attacked Qian Shu, its army directly reached the south bank of the Dadu River. The Shu army fought with their backs against the water and won a great victory, killing tens of thousands of people.

In the Northern Song Dynasty, Wang Quanbin destroyed Hou Shu and suggested "taking advantage of the situation to take Yunnan".

Zhao Kuangyin drew a mark on the map with his jade ax and said, "I don't have anything else."

"It is necessary to abandon the Yuexun counties and use the Dadu River as the boundary. If the invaders cannot be defeated and the ministers cannot be defeated, the best strategy is to defend the army." - Zhao Kuangyin ordered the abandonment of all of Yizhou and half of Lizhou, thinking that such a defense would be "to defend the army."

The best policy.”

In this way, the territory of 750 miles was thrown to Dali. The military town and fort system rebuilt by Li Deyu and Wei Gao in the middle and late Tang Dynasty, and the good situation built by the former Shu king, who killed tens of thousands of enemies in one battle, was completely destroyed.

Collapse, the defense line finally retreated to the "natural limit".

To a certain extent, Zhao Da, who easily gave up the southwest territory and planned to save money to redeem the Sixteenth Province of Youyun, was not as ambitious as Zhao Er, the donkey-cart war god. At least his younger brother really started to do it, although the ending was very bleak.

.

Shao Shude looked at the number of garrison troops marked on the map and frowned.

To the west and south of the Dadu River, the garrison only had two under-manned commanders, with a total of more than 3,000 men. In addition to the thousands of native Tuan soldiers from Fanzhi, the total strength was six to seven thousand.

With such a small number of people, if the Great Chowa Kingdom comes to attack, there is a high probability that they will not be able to withstand it.

As for whether Dachang Heguo came, there was no doubt. The front reported that the thieves had sent troops north and began to besiege several forts garrisoned by the Xia army. The walls of these garrison walls were thin and low, and each had only a few hundred soldiers, so their fall was inevitable.

After that, we will attack the Dadu River directly.

Of course these are not the most troublesome.

The most annoying thing is that the barbarians in Li and Xizhou vigorously responded to the Great Chowa Kingdom and raised troops to cause chaos, with the central intention of creating chaos - the barbarians in Yazhou were given face and did not join in the chaos.

"What the hell, sir, you're going to launch an army before you get a wife?" Shao Shude slapped the table again and ordered: "Convene the political hall and the Privy Council to ask the prime ministers."

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Chapter completed!