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

If they choose to retreat to the Black Dragon's Mouth, the mysterious Yi Xiaochuan is really worried. He secretly thought: Judging from the current situation, Gao Yao is very likely to have an ambush. After all, even they have encountered such a fierce ambush, there is no reason why Zhang Han's side will be safe and sound!

If they rush into the Black Dragon's Mouth without being able to escape, then wouldn't this huge army of nearly 200,000 be like a catfish waiting to be slaughtered on a pallet, and could only be manipulated and disposed of at will by Gao Yao? Thinking of this, the mysterious Yi Xiaochuan couldn't help but frown, and cold sweat dripped down his forehead.

At this moment, an anxious soldier rushed to Yi Xiaochuan, knelt on one knee, clasped his fists and shouted loudly: "General, the enemy has already rushed over, the situation is critical, please make a decision quickly..." Before the soldier finished speaking, several soldiers with the same panicked expressions gathered around him and asked Yi Xiaochuan in unison what action they should take next.

Facing the pressing battle situation and the eagerly expectant eyes of the generals, the mysterious Yi Xiaochuan took a deep breath, decisively waved his hand, and sternly said: "Retreat! Withdraw immediately and break through with all your strength!"

"Yes!" Following Yi Xiaochuan's order, many soldiers responded with a roar, and the sound shook the sky. Then, the imperial army, which had been fighting fiercely with the black-armored army, turned its spearhead instantly, no longer paying attention to the black-armored army still in the camp, but concentrating its forces to desperately protect Yi Xiaochuan and break out. For a time, the sound of shouting and killing and the sound of weapons clashing resounded throughout the battlefield, which was terrifying.

Although the imperial army fought hard, the fierce attack of the black-armored army and the continuous encirclement of the infantry made the battle more and more tragic. After a bloody battle, the mysterious Yi Xiaochuan was only able to lead less than 5,000 defeated soldiers to successfully break through the encirclement. The rest of the soldiers either died on the battlefield or fled and disappeared into the night. Many of them simply chose to surrender. The entire rear army was completely defeated in less than an hour.

At the same time, the battlefield where Han Xin was was full of good news, and he had already won a great victory! Seeing that they were doomed to fail, many imperial soldiers chose to lay down their weapons and surrender. However, this victory was not easy to come by, and Han Xin himself was also injured, but even so, he still relied on his tenacious perseverance and excellent martial arts to successfully kill the general in the rear of the enemy army.

With the death of this general, the enemy army suddenly fell into chaos. The soldiers who were still barely resisting suddenly lost their backbone and their morale plummeted. Seeing the situation was not good, a large number of soldiers surrendered to the army led by Han Xin.

Han Xin knew that the opportunity to fight was fleeting, so he did not dare to slack off. When the battle just ended, he immediately began to reorganize his army. On the one hand, he quickly gathered the surrendered soldiers, and on the other hand, he reorganized and deployed the original troops. At the same time, he led the army to march rapidly towards Heilongkou without stopping, and ordered his subordinates to build solid fortifications at the location of Heilongkou.

This is another significant advantage of the Southern Frontier Army over other armies. They have an excellent logistics force, which is equipped with professionals who are good at building fortifications. These people are experienced and skilled, and can adapt to local conditions in a very short time and use materials in the surrounding environment to build an indestructible defense system.

Not only does it ensure the safety of the army, but more importantly, because this work is highly professional and dangerous, the personnel engaged in this work can enjoy quite generous treatment. Because of this, a large number of talents have been attracted to join the work, making the logistics support capabilities of the Southern Frontier Army always in the leading position.

At the same time, a large number of southern troops quickly took action and enthusiastically devoted themselves to an intense task. They picked up the wood in their hands and carefully processed it into sharp and thorny shapes, like extremely sharp spears. Not only that, the bottom of each wooden thorn was cleverly made into a stable triangular structure, and then buried deep underground. In this way, these wooden thorns are like steel guards rooted in the earth, indestructible, greatly enhancing their stability.

There is no doubt that all these efforts are to create obstacles for the imperial army to break out at the critical moment. At this moment, Zhang Liang, Kong Gang and others in the middle of Heilongkou have already started their steps. They are holding some unique special props and are making preparations to evacuate Heilongkou in an orderly manner.

These tools were mud sleds prepared in advance. This mud sled was uniquely designed, light and flexible, and could move quickly on the muddy and slippery ground as if walking on flat ground. It was with these magical mud sleds that Zhang Liang and his companions had the confidence to successfully complete this arduous retreat mission under the enemy's nose.

The mud sled is a unique tool with an ingenious design. It is made of a wooden board with a high front end, and the whole is long and narrow. In the middle of the board, a handrail is carefully set to facilitate the user to grasp and control the direction. From the appearance, the mud sled is quite similar to the canoe.

The relevant records of this magical tool actually existed in the history books as early as the time when Dayu controlled the flood. However, despite its long history, it has never been widely used on a large scale. However, this does not affect its excellent performance in specific environments - especially in swamps, the mud sled shows extraordinary convenience.

Knowing the advantages of mud sleds in swamps, Zhang Liang, Kong Gang and other talents resolutely chose to carry the mud sleds that had been prepared long ago and bravely stepped into the mysterious Heilongkou. With these sophisticated tools, they quickly crossed the hundreds of meters wide swamp area like a fish in water and successfully left the core area of ​​Heilongkou.

When they finally crossed the muddy swamp, they saw a steep cliff. Fortunately, ropes had been fixed here for climbing. Even if the court sent the most alert scouts to investigate, it would be difficult to find this dangerous place hidden in the deep mountains and valleys.

At this time, the central army led by Zhang Han was still advancing steadily. As a result, less than an hour after entering Heilongkou, a messenger came hurriedly to deliver the order.

"Report, the rear army encountered a surprise attack by the southern border army. The enemy has at least 30,000 soldiers. They are using the heavy rain as cover and have already charged towards the rear army camp!"