Mythical Qin: I, Gao Yao, will never be a eunuch!

While Zhang Han led his troops to search the valley anxiously for Gao Yao's looming figure, Han Xin and Ying Bu had already quietly set up numerous traps at the entrance of the valley. The densely packed sharp barbs spread throughout the entire valley entrance area, like a beast with bared fangs, which frightened the imperial army.

These barbs were not only numerous, but also densely distributed and at tricky angles, making the imperial army, even with its powerful cavalry, completely lose its former majesty and dominance when charging into battle. Because if they were not careful, the horses' hooves would be pierced by the sharp barbs, and the horses and riders would fall off their horses in an instant, throwing the entire cavalry into chaos. The cavalry couldn't even charge out, let alone the infantry.

Looking at the terrain of the valley entrance, it was originally wide outside and narrow inside, just like a closed cloth bag. In this way, a large number of archers from the southern border army only needed to hide on the hillsides on both sides and continuously shoot arrows at the valley entrance from a high position, thus forming an impenetrable line of arrow rain defense. If the imperial army dared to take the risk of breaking out and charging, they would inevitably be pierced by countless arrows like a hornet's nest, with heavy casualties.

What was even more troubling was that the Southern Border Army had already begun to build towering arrow towers nearby. Once all of these arrow towers were completed and put into use, it would be even more difficult for the imperial army to break out of the siege. After all, the rain of arrows pouring down from above would greatly increase its lethality and coverage, posing a fatal threat to the imperial army.

These seemingly inconspicuous barbs on the ground are actually buried in a very special and complex way. They are deeply rooted in the ground, intertwined and entangled with each other, and it is not easy to destroy them easily. Moreover, even if the imperial army is determined to forcibly remove these obstacles, how can the smart and resourceful southern army stand still and do nothing? They will definitely use various tactics to fight back, so that the imperial army's sabotage actions will be repeatedly frustrated.

The Southern Border Army even covered these barbs with mud and water, so it was difficult to ignite them even with fire. This was also the reason why the imperial army had been unable to break through.

At this moment, the night was as dark as ink, and Zhang Han, who was in the camp, was anxious and uneasy, with no thought of resting at all. To be precise, he couldn't sleep peacefully at all.

At this time, Zhang Han's camp was only two miles away from the terrifying Black Dragon Pass. This distance seemed close, but it became an insurmountable gap to leave this place safely. Although the idea of ​​launching a surprise attack at night flashed through his mind, after careful consideration, he finally gave up helplessly. After all, it was more difficult than imagined to succeed in this situation.

As time passed, Zhang Han knew that the longer he delayed, the slimmer his chances of successfully breaking out would be. Zhang Han had never even thought about whether the mysterious Yi Xiaochuan would lead reinforcements to rescue him. In his opinion, even if Yi Xiaochuan could gather all the remaining soldiers, the number would be at most 10,000 or 20,000. With such a small force, it would be a pipe dream to break through the enemy's defenses and rescue them. At present, if he wanted to truly resolve this crisis, he could only hope to transfer the army led by Wang Li, which might be the only way to survive.

However, the army had already run out of food. How long could these more than 100,000 strong troops hold out? The current situation was truly like a skilled cook without rice!

Suddenly, there was a burst of hurried horse hoof sounds and shouts outside the tent: "Report - The Southern Border Army has sent someone to deliver a letter, please open it yourself, General!" Before the words fell, a messenger with a command flag on his back rushed into the tent like a gust of wind, knelt on one knee, held the mysterious letter high above his head with both hands, and respectfully handed it to Zhang Han.

Zhang Han slowly took the letter, but he did not open it immediately. Instead, he sighed softly with a hint of bitterness and helplessness on his face. Even before he had read a single word in the letter, Zhang Han's mind was like a mirror, and he had already understood the general content of the letter.

There is no doubt that this letter must be a letter of persuasion from the Southern Border Army. Faced with such a situation, Zhang Han felt mixed emotions and didn't know what to do for a moment. In fact, Zhang Han did not lack the courage to fight to the death. If it were any other situation, even if the enemy was outnumbered and he was in a desperate situation, he would not hesitate to draw his sword and lead his troops to fight bravely. But the current situation is completely different. Rather than fighting to the death, it is more like seeking death.

At the same time, the mysterious Yi Xiaochuan had already withdrawn more than ten miles away from the Black Dragon's Mouth, and had gathered all the remaining soldiers. However, at this time, the mysterious Yi Xiaochuan only had 15,000 soldiers, and the morale of the soldiers was extremely low. Similar to the situation faced by Zhang Han, the mysterious Yi Xiaochuan had no surplus food at all.

At this moment, although he knew that all this was carefully planned by Gao Yao for a long time, the mysterious Yi Xiaochuan was helpless. At this moment, the mysterious Yi Xiaochuan suddenly realized that his inner calculations had been seen through by Gao Yao, as if every move he made fell into the trap set by Gao Yao accurately.

After receiving the report from Zhang Han's soldiers who were attacked by Han Xin, the mysterious Yi Xiaochuan finally understood where he had lost. The most serious oversight was that he seriously underestimated the strength and number of Gao Yao's army. In this battle, Gao Yao actually mobilized at least 100,000 troops! However, in the intelligence that the mysterious Yi Xiaochuan had obtained through various channels before, it was estimated that Gao Yao could mobilize no more than 50,000 troops. It was precisely because of such a huge intelligence error that led to the final defeat.

At this moment, another soldier came in a hurry to report: "Report... Sir, urgent news has come from the two counties of Bashu. The Southern Border Army sent a surprise force to suddenly attack our army's grain transport team. All the grain and grass have been destroyed!" Upon hearing this, the mysterious Yi Xiaochuan felt as if he had fallen into an ice cellar, and a chill surged in his heart. It was another surprise force. This time, the mysterious Yi Xiaochuan really felt a little scared. He didn't know how Gao Yao did it.

In order to launch a surprise attack on the two counties of Bashu, the number of troops needed would be at least 5,000. However, such a large number of cavalrymen could avoid Wang Li and evade the defense of the checkpoints of the two counties of Bashu. It would be strange if the mysterious Yi Xiaochuan was not surprised.