Wang Yuan immediately ordered an inventory of the number of soldiers and horses lost after the sandstorm, and in the end, more than 200 soldiers and more than 300 cattle were lost on the road, and they probably all died in the desert. The sandstorm just now seemed to have the power to move mountains and reclaim the sea, and these lost soldiers and cattle could not escape.

After escaping death, the hormones in the soldiers' bodies began to subside, and the camp became quiet. As the night deepened, the sandstorm seemed to sweep away the heat from the sand, and the temperature suddenly became extremely cold. After the hot sweat on the soldiers' bodies cooled, their bodies began to chill, and the groups of eyes shrank in the tent and shivered.

Wang Yuan originally wanted the army to rest all night, and launch an attack on Bison City in one go, early tomorrow morning. But after walking around the barracks, Wang Yuan changed his mind. After the sandstorm, morale has fallen to a certain level. Moreover, the night was unusually cold, there was no hot sand to keep warm, and it was impossible to make a fire so close to Bison City, and if the attack was launched early tomorrow morning, I am afraid that the situation would be even worse.

Therefore, Wang Yuan convened all the generals to discuss whether to take Bison City overnight, taking advantage of the residual power of the end of the strong crossbow, otherwise I don't know what the situation will be tomorrow. Song Jiangong and other generals were also worried about the current situation, and they hit it off when they heard the words. Wang Yuanyi immediately ordered a night attack on Bison City. Infantry with siege equipment as the main force to attack the city. Liu Jun led 5,000 cavalry to intercept and kill the defenders of Bison City who were trying to flee after the infantry launched a siege battle.

So, the soldiers dragged their cold bodies and got up and began to march in the direction of Bison. The cold body began to regain its vitality after a few miles of running, although this was an excess of the body's energy, but it was much better than staying in a tent and feeling cold.

The experienced Song Jiangong and Wei Guangzhong led 20,000 infantry to take charge of the siege operation, and under the cover of night, they quickly built more than a dozen pontoon bridges on the already small moat, using cloud ladders as bridges. Thousands of soldiers, under the cover of the whining wind, touched the city and set up hundreds of ladders.

The horn of the warning at the head of the city of Bison City sounded, and the five thousand Tibetan soldiers and horses defending the city quickly gathered to defend the city, and Song Jiangong under the city saw that the defenders had found that the plan of sneaking up the city was half successful, so he simply did not do anything and ordered a full-scale attack.

The rumbling drums resounded in the night sky, and the Tubo soldiers who hurriedly rushed to the head of the city to defend the city looked at the overwhelming torches that were instantly lit under the city, and the local soldiers who swarmed up, trembling and chilling one by one. Countless torches lay on the ground in the vast oasis beneath the eastern walls of Bison City, like wildflowers that grow on the oasis in summer, and soldiers with a little common sense can estimate the number of enemy troops. That's tens of thousands of enemy troops.

When Lu Xizan rushed to the head of the city in disarray, the siege battle was in full swing. Under the eastern city wall of Bison City, which is only two miles long, countless Tang soldiers are climbing the ladder, and ants are pouring up the city wall.

Lu Xizan's face was as pale as earth, and he ordered loudly: "Defend to the death, defend to the death." Bow and arrow, bow and arrow for me, what about the sandbag? Push them down and stone them to death. Don't mess around! Don't mess around! ”

I want the soldiers not to mess up, but in fact, Lu Xizan is more chaotic than them. The soldiers ran around like flies in his drunken and chaotic orders, not knowing what to do. The arrival of the defending general not only did not ease the critical situation, but only increased panic and tension.

But after all, there were 5,000 defenders in the city, and thousands of people were guarding the city walls, how could the Tang army's offensive be so easy to succeed. Tang soldiers constantly rushed to the city, but they were cut into meat sauce by a scimitar. The sandbags that were constantly dropped broke the tendons and fractures of the Tang soldiers who were gathered under the city. On more than a dozen arrow towers at the head of the city, the feathered arrows of hundreds of Tibetan archers also rained down on the Tang army under the city, constantly bringing a large number of casualties to the Jiannan army.

Wang Yuan frowned and rode his horse to watch the battle from a distance, the siege was obviously blocked, the soldiers suffered heavy casualties, and the culprits were the dozens of arrow towers on the city wall, they were the main culprits who hindered the siege.

"Where is Liu Dehai?" Wang Yuan shouted.

Liu Dehai appeared from behind him, hugged his fists and said: "Handsome, the last general is here." ”

Wang Yuan said: "Has the Fuyuan crossbow ever been intact?" ”

Liu Dehai said: "Fifteen are intact. ”

Wang Yuan said: "Go to the battlefield and help Song Jiangong." Knock down the towers at the head of the city. ”

Liu Dehai promised loudly, and after a while, hundreds of soldiers dragged fifteen Fuyuan crossbows forward from the rear. The power of the Fuyuan crossbow is limited, but the range is very long, and it uses an iron crossbow arrow with a thick arm, which can pierce hard objects in a small area. Wang Yuan wasn't sure if he could deal with the arrow towers at the head of the city, but at the moment, this was the only siege machine that could be used. In the battle across the desert, only small mobile siege equipment can be carried, and things like trebuchets cannot be carried here at all.

Liu Dehai quickly placed fifteen Fuyuan crossbows three hundred meters away from the city wall. With the range of the volt crossbow, it can reach a maximum distance of 300 steps, which is about 450 meters. In order to increase the power, the closer you shoot, the more powerful the bolt will be.

Fifteen Fuyuan crossbows were aimed at the arrow towers at the fifteen city heads, and the powerful and thick rope-like bowstrings were slowly opened by more than a dozen soldiers, making a creaking and squeaking sound. After snapping into the machine spring, the iron-tipped crossbow arrows with thick arms were installed one by one. Liu Dehai gave an order, and fifteen Fuyuan crossbows were fired together, the bowstring trembling sound was low and piercing, and the crossbow arrows flew out with the sound of wind and thunder, shooting towards the arrow tower at the head of the city like meteors.

Boom Boom! Ten of the fifteen towers were shot, and five crossbow arrows flew straight into the city of Bison. The arrow tower that was shot burst into a puff of white smoke, and the crossbowmen cheered. The shooting of the bows and arrows on the arrow tower that was shot stopped, and the Tang soldiers thought that the arrow tower had been destroyed through, but as the night wind blew away the smoke and dust, the arrow towers with crossbow arrows were already standing, and bows and arrows began to shoot from inside again.

"Damn, only shot a few rocks, and couldn't destroy the tower." Liu Dehai stomped his feet and scolded.

Just as he was anxious, Zhao Qing rushed over on his horse in the rear, and shouted: "General Liu, the marshal wants you to concentrate on the Fuyuan crossbow to attack an arrow tower and destroy them one by one." ”

Liu Dehai slapped his forehead and scolded: "Look at my pig brain." Someone came, moved the crossbow again, and aimed it at an arrow tower to concentrate on shooting. ”

Fifteen Fuyuan crossbows are gathered in one place, separated by a few zhang. The bowstring was opened, the crossbow arrow was wound, and Liu Dehai ordered loudly. Fifteen crossbow arrows shot out and went straight to the tall arrow tower on the right side of the tower. This time, more than a dozen iron-headed arrows were concentrated in the battlement shelter above the arrow tower at the same time, and a loud rumble was heard, and the naked eye could see that the platform on which more than a dozen archers stood above the entire arrow tower began to collapse. The sand and gravel rolled down, the smoke and dust flew in all directions, and a dozen archers fell down in the mud and sand, some fell to the city wall, and some fell directly to the city.

"Hahaha, it really worked. Go ahead, one by one. Liu Dehai laughed, and the soldiers wound up again, knocking down the five or six arrow towers within the range one by one, and then moving their positions and breaking them down.

The Tubo soldiers at the head of the city watched as dozens of arrow towers were destroyed one by one, and without the continuous sniping of bows and arrows from these arrow towers, the Tang army had obviously become difficult to resist. As the city wall was broken through in many places, the Tibetan defenders on the city wall fell into a bitter battle, and the news that the city gate was about to be broken by a rushing car also reached Lu Xizan's ears. Lu Xizan understood that the general situation had gone, and when it came to the moment of life and death, his drunken and chaotic mind began to sober up, and he ordered the soldiers to defend the city desperately, but he secretly took dozens of guards down the city wall and rode a camel to the west gate of Bison City.

The offensive of the Tang army was like a tide, more and more Tang soldiers attacked the city, and the Tibetan defenders were defeated and began to be compressed in a small area and fought hard. I don't know who shouted: "Lu Xizan has already run away, what are we going to fight?" This voice made the defense line in the hearts of the Tibetan soldiers immediately collapse, and they began to flee in all directions.

After the city gate was opened, a large group of Tang soldiers and horses poured into the city. The Tibetan soldiers who had fled were scurrying around the city, and the soldiers who had grabbed the camels fled wildly outside the other city gates. The Tang infantry in the city advanced unhurriedly, as if they did not mind the defeat and escape of the Tibetan soldiers, and occupied the entire city step by step.

The Tubo soldiers who fled to the outside of the city rushed into the desert in a panic, but they were desperate to find that the cavalry of the Tang army outside the city had already blocked their way, a small number of Tubo soldiers chose to fight hard, and most of them wittily chose to surrender.

Lusizan led dozens of guards to the grass west of Bison City, and he knew that once he entered the desert, there was hope of escaping. There are hundreds of miles of desert land in the west, and it is almost impossible to search for people in the desert, not to mention that he has the ability to hide in the desert, and the camel mount that can run freely in the desert, the horses of the Tang army will never catch up with him.

The sound of slaughter in the Bison City in the rear shook the sky, and there were defeated soldiers fleeing at the city gate, and Lu Xizan understood that the Bison City had been broken. But he was in no mood to care about this at the moment, looking up ahead, the shadow of the sand dunes in the distance could already be seen in the outline of the night. On weekdays, I am disgusted to see these sand dunes, but today I am extremely kind and happy to see them, as long as I enter them, my life will be saved.

However, a hundred paces away from the sand dunes, on the edge of the desert, hundreds of torches suddenly lit up in front of them. Lu Xizan's desperate eyes saw hundreds of cavalrymen dressed in Tang army armor standing on their horses, and a young general in white armor sat proudly on a white horse. Hundreds of pairs of indifferent eyes were looking at him coldly. The blood on Lu Xizan's body began to chill, and it turned out that the Tang army had already laid a net on the edge of the desert.