According to the previously agreed battle plan, Guo Song led the three hundred eagles to strike the army at night out of Qiuci City, disappeared into the night, the next day, the commander Guo Xin visited the king of Qiuci again, the news that the Tubo coalition army was about to attack Qiuci told the king of Qiuci, according to the custom, the king of Qiuci would generally retreat west with the residents of the city.

The atmosphere of war began to shroud in Qiuci City, but the people who were accustomed to the war were not panicked, the Tubo army only arrived in Puchanghai, which was still far away from Qiuci City, they did not hurry to pack up their belongings, put on the cart, and finally took the children and the elderly, before locking the gate and leaving Qiuci City, heading to the Bachang River Valley in the west, which also belongs to Qiuci Country, and almost all Qiuci people have land there.

At this time, 20,000 Tubo and Tuyuhun combined forces had arrived at Puchanghai, and then turned around and marched northwest along the Chihe River, and their goal was very clear, that is, Qiuci City.

This time, the Tubo coalition army sent 20,000 troops, but the Tubo soldiers were only 3,000, although this army was dominated by the Tuyuhun people, but the main general in command was the Tubo general, which was also in line with the convention, the Tuyuhun people have always been a servant army, only the part of the troops, but there is no command.

Although Tibet was at the peak of its greatest strength in history, its territory stretched westward from the Qinghai-Tibet Plateau to Anxi, crossed the Green Mountains, defeated the Uighur army, occupied most of Tochar, and continued to compete with the Uighurs for the Hezhong region, making it a great power with a territory of thousands of miles.

However, the weakness of Tibet was also fully reflected at this time, its population was too small to support such a large territory, and in order to recruit soldiers, more than 14 men were conscripted into the army, and only the old and weak women and children were left in the hinterland of Tibet, which seriously affected the development of the internal productive forces of Tibet.

At noon on this day, the Tubo coalition army arrived at Puchanghai, the main general Xiang Yougui rested for a day, and then continued the march tomorrow morning, the Tubo coalition army carried hundreds of carts, mainly carrying grain and siege ladders.

At this time, a goshawk circled in the sky, chirped a few times, and then flew north.

Thirty miles north of the Tibetan army's camp, the 300 Tang troops led by Guo Song hid in a poplar forest, and the fierce son circled twice in the sky and slowly landed on Guo Song's shoulders.

"Chirp—" It whispered twice.

Guo Song stroked the eagle's back and said to Li Ji: "It has discovered the situation, there is an enemy situation in the south of us, and it should be the main force of the enemy." ”

Li Ji was surprised: "Mengzi can still probe the enemy? ”

Guo Song smiled slightly: "I have always told people that the eagle is a spiritual animal, it actually knows what you want, the key depends on how you communicate with it, after getting along for a long time, there will naturally be a tacit understanding, it tells me that there are many people like us in front." ”

"Did it say how many there were?"

Guo Song laughed, "If you know how many people there are, it's the Condor." ”

Mengzi glared at Li Ji dissatisfied, flew into the sky, and flew westward.......

At night, 20,000 Tibetan allied troops wrapped in blankets on the grass by the lake went into the night, they did not set up tents, but formed a large circle, and placed heavy supplies in the middle.

For example, they knew that the Tang army was good at sneak attacking logistics and baggage, so they put the baggage among the soldiers, and for example, Putaocheng was attacked by the Tang army at night, burning the company camp, and almost all the 3,000 people were wiped out, resulting in the fact that the Tubo army now does not dare to set up tents, lest it be burned by the Tang army again.

Even if the Tibetan coalition army slept at night, 2,000 cavalry would be deployed outside to patrol the outposts, and once the enemy arrived, the alarm would be raised immediately.

At the third watch, Li Ji led dozens of cavalry to the periphery a few miles away, they were immediately discovered by the patrol post, the alarm sounded, Li Ji immediately led his men to leave quickly, and the sleeping Tubo coalition army was awakened one after another, quickly picked up weapons and prepared to fight, sleepy and expelled without a trace.

When he heard that only twenty or thirty Tang troops had been found, he was so angry that he scolded, "A bunch of fools, if the enemy scouts come to harass more than a dozen times a night, do you want the army to sleep?" ”

More than a dozen Tuyuhun patrol sentinels trembled, bowing their heads and not daring to speak.

The deputy general Murong Bianlin was the leader of the Tuyuhun army, he waved his hand to let the patrol go down, and said to the main general: "Speaking of which, the patrol is not wrong, they can't judge how many people are coming from the other side?" In case most of the other party is hiding behind their backs, wouldn't they have missed a big deal by not calling the police? ”

Xiang Yangui said coldly: "Does the soldier still want to sleep at night?" ”

"The meaning of lowly duty is that if we march at night and rest during the day, on the one hand, it will be warmer during the day, and we will not freeze when we sleep, and secondly, the patrol will have a good line of sight during the day, and the patrol will see far away, so there will be no misjudgment like tonight."

Xiang Yangui pondered for a moment and said: "You have a point, so it was decided, we will leave tomorrow evening, and rest for another day during the day." ”

.......

The Tubo coalition army changed its marching strategy, which was indeed very effective, and the Tang army could hardly find an opportunity to attack.

Guo Song gathered the generals together to discuss, and he said to everyone: "Now that the Tubo coalition army has changed to rest during the day and march at night, what are your good suggestions?" ”

Liang Wu asked, "If it's a night march, will it be an opportunity for us to attack the other party's baggage?" ”

Li Ji snorted lightly, "The other party is very experienced, the baggage team is protected by heavy soldiers on both sides, and there are three thousand cavalry at each end, once we attack the baggage with bows and arrows, the cavalry at both ends will immediately launch an encirclement, and we are likely to be surrounded by six thousand cavalry regiments, at this time, the baggage team will become a trap." ”

Guo Song nodded, "Li Duwei is from experience, although we took the risk successfully before, but that was because the enemy did not expect us to appear, their negligence gave us a chance, and now they have learned a lesson, Li Dudu has tried several times, and found that they are extremely vigilant, in this case, there is no need to take risks, we still have to wait patiently for the opportunity." ”

"So what do we do next?"

Guo Song smiled slightly: "Do you know that every time the Tubo and Tuyuhun people attack Longyou, they almost return in vain, what is the reason?" ”

Guo Chongqing smiled: "I want to hear it in detail!" ”

"It's because the logistics and supplies of the Tubo people can't keep up, and if we want to defeat this Tubo coalition army, we still have to make a fuss about supplies."

Guo Song saw that everyone was a little puzzled, so he continued: "The Tubo people brought a total of six or seven hundred carts, half of which were siege ladders, and the other half were grain, but they didn't see cattle and sheep, do you know how much food 20,000 troops need a day? It costs at least 200 stone of grain and 2,000 sheep a day.

But they only transported grain for more than ten days in the cart, and the meat was estimated to be provided by the Tubo people in Qiuci, but I had learned before that the Tubo people had about 100,000 sheep in Qiuci, and I heard that the Tubo herdsmen in Qiuci were generally only willing to give 20,000 sheep as military rations, and it is likely that they had transferred 80,000 sheep, leaving only 20,000 sheep, and there were no cattle. ”

Guo Chongqing understood what Guo Song meant, and he nodded, "In other words, the Tubo coalition army only has ten days to attack the city?" ”

Guo Song smiled faintly: "Actually, there is still their return journey, and the return journey will take at least half a month, how to solve the food for their return journey?" ”

Everyone immediately understood that the goal of Changshi was to cut off the Tuyuhun herdsmen along the Momo River and Puchanghai to cut off the supply of the Tubo coalition army on the return trip, and if the Tubo coalition army got the news, they would have to withdraw their troops in advance.

I have to say that this is a relatively clever plan, a typical bottom of the kettle.

The three hundred cavalry of the Tang Army no longer followed the main force of the enemy, but turned around and killed Puchanghai.

Large areas of land along the Puchang Sea, along the Jimo River, and along the Sabitize coast south of the five cities of the end are the territory of the Tuyuhun people, where thousands of herdsmen and hundreds of thousands of sheep live.

Most of the young and strong men have joined the army, and only a very small number of young men and thousands of old and weak women and children remain.

On this morning, a strong Tang cavalry appeared, set fire to the tents, killed the young men who resisted, beheaded the sheep, and forcefully drove the Tuyuhun herdsmen, first starting from Puchanghai, and soon spread to the banks of the Jimo River, the Tuyuhun herdsmen fled their homes in panic, they drove the sheep, with the old and the young, forced to leave Anxi, and retreated along the foothills of the Kunlun Mountains to the plateau.

The expulsion lasted 10 days, thousands of tents were burned, nearly 100 young men were killed by the Tang army during the clashes, and all the women, children, and elderly people and their flocks were expelled from Anxi.