After Emperor Qin Shi Huang sent Meng Tian to the north, he felt much more relieved. One day, he was handling affairs in Xianyang Palace, and suddenly an urgent military situation came from the south. It turned out that in the far south, there was another general, Ren Huan, who was leading an army of 100,000 to conquer Baiyue. Baiyue is also known as Baiyue. Their range of activity was roughly in a vast area south of the Jianghuai River and consisted of primitive tribes. Those who live in the Wuyue area are called Ouyue; The area in central Fujian is called Minyue; Lingnan is called South Vietnam; The westernmost is called Yuyue. These aliens had dealings with the Central Plains people for a long time, and as early as the time of the Three Kings and Five Emperors, they submitted to the Central Plains royal power. According to historical records, during the period of King Shang and King Zhou, people of various ethnic groups in Lingnan paid tribute to the royal family such as pearls, tortoiseshells, ivory, rhinos, and jade. The "Book of Songs" also says: 'In Xinjiang and in the future, as for the South China Sea'. After Ren Huan led the Qin army to capture Minyue, he established Minzhong County in Dongye. They then attacked South Vietnam. However, while fighting South Vietnam, the Qin army encountered a sneak attack and suffered heavy casualties. General Ren Huan had no choice but to send someone to Xianyang to report the emergency.

When the emperor learned of the situation, he convened his ministers again to discuss, and he said to everyone: "General Ren Huan was ordered to conquer Baiyue in the south, and now he is blocked in Longchuan, what should you do?" The ministers didn't dare to discuss in vain, but just looked at the captain together. The First Emperor said unhappily: "I used to discuss things with you, and all of them were brave and strategic? Now that the world is unified, is it better than the Chu people in South Vietnam, the land of barbarians, and the place of tattoos? How are its generals better than Xiang Yan? Seeing that the emperor was angry, Wei Yu had no choice but to stand up and answer: "Although the people of South Vietnam are not as difficult to deal with as imagined, the terrain of the place where they are located is complex, coupled with the changeable climate, insects and snakes are rampant everywhere, or miasma is pervasive. Under such conditions, our army fought protractedly, and grain and grass could not be delivered on time, the war was naturally unfavorable to our army. However, 'the anger of the praying mother, An can use his arms as a car. 'Qin rules the world, and its momentum is like a bamboo. If His Majesty sends another general and the generals go south, Baiyue will naturally be pacified! ”

The emperor was overjoyed when he heard this, and said, "Qing's words are very agreeable. I heard that the soldiers there waited for the dawn, and their armor was full of lice. They worked hard and fought to the death for the country, they are really good men of my Qin country! I have made up my mind, and I will send another 100,000 troops to reinforce the general. Which of you would like to lead your troops south? Suddenly, the two of them stepped forward and said in unison: "The two of us are willing to go." "It turned out to be General Zhao Tuo and Du Wei Tu Sui. The emperor was overjoyed and said: "The courage of the two generals is commendable! However, the roads in the south are rugged and the waterways are crisscrossed. I ask you, how are you going to enter the army? Zhao Tuo said: "Your Majesty, after we arrive in Jing and Chu, we will recruit a group of migrant workers there, open up the road first, and then launch an attack." The emperor said: "The army is heading south, the roads are rugged, the lakes are crisscrossed, I have sent a water conservancy expert to be your supervisor, and I will consult with him in case of trouble." The second general even claimed to be. The first emperor ordered Dushui Cheng Shilu to go with the army.

The three led the army to Linxiang, the county capital of Changsha County, and settled the soldiers and horses. Shi Lu said: "What our army is worried about is that the roads are impassable, and the grain and grass cannot be helped, so we should recruit migrant workers to dig the road as soon as possible." Zhao Tuo and Tu Sui were responsible for recruiting strong men, and they gathered 300,000 migrant workers. The state of Qin stipulates that all sons-in-law and small traders and peddlers who enter the wealthy family are regarded as cheap slaves and are not allowed to be treated with ordinary commoners. Therefore they were forcibly conscripted into forced labor, and they were to be included with the criminals. Shi Lu inspected the route of the army, he first came to Lingling, carefully surveyed the terrain, and believed that the distance between the Xiangjiang River and the upper reaches of the river was relatively short, and the difference in water level was not very large, and an artificial canal should be dug to solve the problem of transporting grain, grass and materials. After everyone discussed, the troops were divided into three roads, and each road also carried the migrant workers who opened the road: the left route was led by Zhao Tuo, and went south from Luling and Nanye; Shi Lu is the right road, starting from Lingling, and going down the river along the water; Tu Ju took the route of Leiyang and attacked Wuling along the Huangshui. He also contacted General Ren Huan and marched from Longchuan to Boluo. The four-way army of the Qin State, together with the servants who dug the mountain to open the road, with a total number of 500,000, launched a great march to Lingnan. Five months later, all kinds of troops and horses entered the land of South Vietnam. The Qin army occupied Panyu, the royal city of the South Vietnamese, which is today's Guangzhou City.

At this time, the emperor also approved Shi Lu's request to dig an artificial canal. Shi Lu and his assistants led a large number of migrant workers to Xiangshui and the places closest to the water to dig canals and build artificial canals. Three years later, the famous man-made canal was dug out, and its total length of 30 kilometers has become an important artery for water transportation and a famous project for the benefit of hundreds of generations. During the Tang Dynasty, it was renamed Lingqu.

At the same time, in the vast northern frontier, General Meng Tian was also brewing a large-scale war against the Xiongnu. For more than half a year, he made a lot of preparations: only let the sergeants eat and drink all day long, compete in archery, and play wrestling. The Qin army used a kind of foot crossbow with a very long range, and the generals asked the sergeants to practice shooting every day. They shot from one place to another, and the sergeants in that place shot back the arrows. In this way, the practice was repeated back and forth, and whoever shot far was rewarded with more food and wine, and the soldiers were all happy. Meng Tian secretly sent sergeants disguised as civilians to blend into the interior of the Huns, helping them transport supplies, inspect the terrain, and the location of the garrison. Tou Manshan challenged Meng Tian many times, but Meng Tian refused to fight. Touman thought that Qin Jun was timid. Over time, they gradually let their guard down. But Meng Tian knew everything about the enemy at this time.

One day, Meng Tian suddenly feasted the soldiers, raised his wine glass, and said proudly: "Soldiers, how long have I let you eat and drink all day?" They replied, "It's been about half a year." Meng Tian said: "We eat imperial food, and we also have to work for the state, right?" The soldiers all said, "We have all the strength in our body, but there is nowhere to go." Meng Tian said categorically: "Defeat the Huns today!" Toumanshan has 300,000 cavalry, since you have the strength, you should destroy them all, are you willing to contribute to the country? As soon as the soldiers heard that there was going to be a war, they all jumped up with joy, and everyone geared up, saying that they wanted to fight with the Huns. Meng Tian was very happy, so he ordered Wang Li: "General Wang, you immediately lead 50,000 elite horsemen, rush to the big river crossing in the starry night, burn the Huns' ferry first, cut off Touman's return route, and then I will go to attack the Great Wall with all my army and kill the Xiongnu's camp." Touman would never have thought that we were going to attack them, and they would inevitably lose the battle. After the defeat of Touman, we will definitely be defeated by the river, and then you and I will surround the enemy on the side of the river and annihilate them all! Wang Li listened to Meng Tian's strategy of using troops, and thought that this was simply learned from his grandfather, so he accepted the order and led his troops to cross the river overnight.

Touman was in the camp north of the Great Wall, and sent people every day to inquire about the news of the Qin army. These days, reports were suddenly received that the flags of the Qin army camp had been reduced. Touman said happily: "This is Meng Tian transferring the Qin army back, it seems that they will withdraw their troops soon." Hahaha! That night, Touman was drunk and was sleeping, when someone came in and reported: "Lord, we suddenly saw a fire in the back camp!" Tou Manshan Yu asked where the fire started. The sergeant replied, "It seems to be the place where the grain is stockpiled." Touman was furious, so he went out to inspect in a rage, and saw that dozens of granaries were all on fire, and the fire was getting stronger and stronger. Seeing this, Touman shouted angrily, "What's going on? Someone reported: "This must have been set on purpose!" Touman yelled, "Go and put out the fire!" The widow will behead the guards immediately! As soon as he finished speaking, he heard a 'whooshing' sound overhead. When Tou Manshan looked up, he saw that the rockets in the sky were like fireworks, shooting at his camp in a volley. In an instant, all the camps of the Huns were on fire. Touman was shocked, and hurriedly led the big and small soldiers to the city immediately. It doesn't matter if you look at it, it was so frightened that Touman seemed to have a stroke, it turned out that the Qin army was holding torches on a battle line dozens of miles long, and it was overwhelming, and the shouting of killing was simply earth-shattering. Touman finally understood: the Qin army had launched a full-scale attack. Touman then ordered a hasty battle.

The Qin army killed under the Great Wall, erected a cloud ladder and stormed the Great Wall, the arrows shot from the rear were as dense as raindrops, and the Huns who were not burned to death hurriedly climbed the Great Wall to meet the battle, and some of them had fled in panic. After a night of slaughter, the Qin army crossed the city wall and slashed together with the Huns. An hour later, the Huns were defeated and retreated. Tou Manshan Yu and the left and right generals saw that they could not control the situation, so they had to retreat with the flow of people. It turned out that the Huns fought only for immediate interests, and if they were unprofitable, they fled for their lives and did not rescue each other, so the whole line was defeated. In just one night, more than half of the 200,000 Hun troops defending the Great Wall had been burned, shot, killed, and trampled to death. The rest followed Da Dan and fled for their lives in a panic. After Meng Tian razed the Xiongnu camp, he led the army to continue to pursue the remnants.

Tou Mandan Yu ran towards the Yellow River, he was defeated all the way, and accepted 100,000 horses in the rear. One evening, the Huns came to the edge of the Yellow River and found that the ferry had been burned by the Qin army, so they shouted: "The widow has been running various departments for decades, galloping through the desert, and has never been defeated, I don't want to be defeated by the Nanban today!" I have heard that there is a saying in the art of war, 'put the place of death and then live', and now if my 100,000 troops fight to the death, the victory or defeat is not yet known! Before he finished speaking, a drum sounded, and the sound of killing shook the ground. I saw the war horse Xiao Xiao, and countless Qin State cavalry armor rushed out in front of him, surrounding Touman's large army. The handsome flag in front of him had a big word 'Wang' written on it, which was Wang Li's army. At this time, the sergeant behind also flew to report: "King, it's not good, Meng Tian is coming from behind!" Tou Manshan was shocked and shouted angrily: "Meng Tian is so cunning, he first cut off the way back of the widow, and then came to chase and kill, it is really despicable and shameless, we fought with him!" Kill! "The soldiers of both sides started a fierce battle on the edge of the Yellow River, a big battle. After Meng Tian and Wang Li rendezvous, Meng Tian ordered the Qin army in the northwest to withdraw from the siege. The king was puzzled, so he wanted to gather and chase Touman alive. Meng Tian said: "Don't force the poor, open the net, otherwise they will die when they see it, and they will fight hard, which is a taboo for soldiers." Wang Li admired his lofty theory.

The Huns were pinned by three times the Qin army, and another bloody battle was flanked. Tou Mandan Yu was about to order a death battle to die with the Qin army, when someone suddenly came to report that there was no Qin army in the northwest corner. Seeing that there was a glimmer of life, Touman led everyone to break through to the northwest. Meng Tian saw that Touman really just wanted to flee for his life, so he led the Qin army to chase and kill. This chase only killed the corpses of the Huns all over the field, the blood flowed like a river, and the water of the Yellow River turned red. Under the protection of the generals, Touman finally fled the battlefield. This battle was indeed as General Meng Tian expected, the Huns did not fight to the death, and the Qin army was able to win a complete victory, and also captured countless booty.

Touman led the remnants of the defeated army and fled west for a night, only to see that the Qin army did not pursue, so he was relieved. At daybreak, they came to the river, and there were only a few thousand men and horses left, and they were all wounded. Touman looked for a boat along the river, and when he saw that there was no boat to cross, he had to look at the river and mourn, and suddenly drew his sword, and was about to wipe his neck. The soldiers on the left and right hurriedly grabbed and said: "Nanban doesn't come to chase after him, this is because God won't let us die!" If the king sends sailors across the river and tells his people the news of the defeat, they will surely row a boat to save them, and we will not die! Touman said: "The widow is defeated, and he has no face to see his father again, how dare he bother them?" The generals all said: "Victory or defeat is a common thing in soldiers, not to mention that the king and Yingzheng are both born great sages, and it is not yet known that they will make a comeback in the future, how can you lose your fighting spirit?" Touman then turned his worries into joy, and hurriedly sent sailors across the river to contact his people.

In the next few days, Meng Tian led a large army to expel the remnants of the Xiongnu and destroy the strongholds. Wang Li followed Shan Yu. One day when they came to the edge of the Yellow River, they were also sleepy and tired, but they did not know where Touman had fled, and they were about to send someone to find out his whereabouts, when suddenly the army detectives came to report that Touman was crossing the river not far ahead. Wang Li asked the Huns how to cross the river. The military detective said: "Someone from Hebei came to rescue them, and dozens of big boats were prepared to ferry back and forth. Wang Li hurriedly led his army to the river, and when he saw that the Huns were rushing to cross, he led the army to rush up. When Touman saw the sudden arrival of the Qin army on the south bank, he hurriedly boarded the boat and left, and the remaining sergeants were all washed away by the river. After climbing ashore, the tribesmen shouted long live. There was a little boy among the clansmen, who looked different, and he was none other than the little prince of Toumandanyu, named Maudun. At this time, seeing that Shan Yu was very embarrassed, he said to Shan Yu: "Father, when I grow up, I will definitely avenge you!" When Shan Yu saw his son, he seemed to have a lot of comfort in his heart, so he caressed him in his arms, and then pointed to the other side and said: "This revenge is not avenged, and the widow will not be blind to death!" Everyone gathered around Touman and ran towards Touman, the head of the clouds. When Wang Li saw that Tou Mandanyu had fled, he was so remorseful that he had to come and report to Meng Tian. From then on, all the lands south of the Yellow River were included in the territory of the Qin state.

When the first emperor received the good news, he was overjoyed, so he rewarded the soldiers and ordered Meng Tian to cross the Yellow River and continue to conquer the land. Meng Tian lived up to his expectations, so he led the army across the Yellow River, captured Gaoque, Beijiao, Yinshan and other places, and built a beacon tower on the side of the Yellow River. When Toumanshan heard that the Qin army had crossed the Yellow River, he abandoned Toumancheng and continued to retreat north. This is what Jia Yi later said in "On the Passage of Qin": "It was to make Meng Tian build the Great Wall in the north and guard the fence, but the Xiongnu were more than 700 miles." The Hu people did not dare to go south and herd horses, and the soldiers did not dare to bend their bows and complain. words. It was there that General Meng Tian set up Yunzhong County and Jiuyuan County, and added thirty-four more counties. At this time, General Meng Tian saw that there was a desert wasteland everywhere and there was no danger to defend, so he wrote to the emperor to build the Great Wall.

After receiving the report, after some careful consideration, the First Emperor summoned his ministers and said: "King Zhaoxiang of Qin destroyed the Yiqu and built the Great Wall in Longxi, Beidi, and Shangjun to resist the Hu people. King Wuling of Zhao broke the forest and Hu in the north, and built the Great Wall from Daidi to the foot of Yin Mountain, and also set up Gaoque Pass to defend against the Xiongnu, so Yunzhong, Yanmen and Daijun were safe. The Yan State also built the Great Wall from Zaoyang to Xiangping County, so Shanggu, Yuyang, Youbeiping, Liaoxi, and Liaodong counties were not afraid of the invasion of the Huns. The migration habits of the Huns will not change, I want to connect the Great Wall of Qin, Zhao and Yan in the past, called the 'Great Wall', it will be a military barrier across the north to block the southward advance of the Hu people, what do you think? Li Si said: "Your Majesty, it must not be done!" The First Emperor asked why not. Li Sidao: "In the past, when the Qin State built the Great Wall in Longxi, Beidi, and Shangjun, it took a lot of manpower and material resources to complete, and it took three years to complete. Now His Majesty wants to connect all the Great Wall in the north, from Longxi to Liaodong, more than 10,000 miles, and there are many mountains and valleys in the places it passes, when will such a difficult project be completed? This will be a costly move, please think twice! The First Emperor said with a smile: "In the past, the Great Wall was built, because of the lack of manpower, but now the world is unified, and everyone is used by Daqin, so why worry about not building it?" The hearts of the people are united, and Mount Tai moves. As long as everyone does it in sections, there is nothing that can't be done. Moreover, the Great Wall is not all built because of the mountain, once this military barrier is built, Hu Ren'an dares to go south to herd horses? "Long live the ministers in unison.

Subsequently, Qin Shi Huang ordered immigrants to the north to jointly reclaim the desert and garrison the border. Since then, the military and civilians of the Qin State have built counties and counties, built roads and roads, built cities and opened up wasteland. The emperor also rectified the officials of the whole country, and all corrupt officials and incompetent officials were confiscated into the army. Those who are in the north should build the Great Wall, and those who are in the south should develop Lingnan and jointly build the country. The Qin State also established Nanjun, Xiangjun and Guilin Counties in the south, and carried out large-scale transportation construction in the Lingnan region.