The post system began in the Western Zhou Dynasty and was a system of delivering information or official documents in the form of relays. Mail, is delivered on foot; The post is passed by horse. This system was very complete by the time of the Great Qin.

Daqin has built a large number of post houses, post stations and other facilities along the straight roads and gallop roads leading to all parts of the world, generally 10 miles to set up a post house, 30 miles to build a post station, built-in post guards, post guards several, post stations are equipped with horses.

The straight road from Xianyang to Jiuyuan, as one of the most important arterial roads in Daqin to resist the invasion of the Xiongnu, has more complete facilities on the road.

Meng Yi came out of Xianyang on the morning of April 15.

The straight road from Xianyang to Jiuyuan, which was built by Meng Tian, was more than 1,000 miles long, and Meng Yi could hear the emperor's worries about the Jiuyuan frontier thousands of miles away from Hu Hai's words, so after leaving Xianyang, Meng Yi began to hurry non-stop.

In addition to bringing two Meng's people, Meng Yi was the ten dead soldiers arranged by Hu Hai to guard, when Xin Sheng received the news that the Xiongnu army was heading south, Meng Yi and his party rushed nearly 500 miles in three days, and just arrived at Yangzhou County in Shangdi County.

……

April 16 of the first year of Great Qin II.

The 200,000 Xiongnu army marching south was encamped in the depths of the prairie nearly 600 miles north of Yinshan Mountain, far from Jiuyuan.

In charge of the scout cavalry in the Xiongnu army, the new Shan Yu Maodun personally sealed the chief of the 10,000 cavalry of the guard, Su Bu Baye. And Subu Baye is the number one hero who followed Mao Dun to kill Tou Mandanyu.

Since the Xubu Baba page, the Sub clan has gradually become another big clan of the Xiongnu after the Huyan clan and the Lan clan, of course, the Subu clan at this moment is still far from being compared with the Huyan clan and the Lan clan.

And the Huns' scout cavalry is also the most elite warrior in the entire Huns, and this elite scout iron cavalry of more than 20,000 people will be handed over to his henchman Subu Baye to lead.

Every time before the sun rises, if there is no special mission, all the Hun scouts sent by the previous day will return to the camp and report the information collected and explored the day before.

The commander of the thousand cavalry where the Hun scouts who were killed by Zhang Mu and others immediately discovered that the scout team had not returned to the camp when he counted his subordinates, and soon reported the fact that more than 40 of his horsemen had not returned to the sub-page.

At first, he didn't pay attention to it, after all, wolves were infested on the grassland, and there were Qin army scouts roaming, although there were not many Hun scouts returning late, but it was not nothing.

It wasn't until the head of the day was rising, and it was almost noon, when the commander of the thousand horsemen came again to report that more than forty horsemen still had not returned to the camp, and Su Bu Baye suddenly felt that something was wrong.

The elite scouts of the Huns with more than 40 horses will be in danger unless they encounter a large wolf pack of more than 100 heads, but they will not be wiped out and no one will return to the camp. However, Su Bu Baye knew that in addition to the wolves, there were also well-armed Great Qin scout cavalry that were more fierce and cunning than the wolves.

Subu Varpage immediately ordered the commander of the thousand horsemen to personally lead the men to probe along the route of the scouts out of the camp yesterday. However, he hurried to the big tent of Shan Yu in the middle of the camp.

Although he was not sure whether this scout team was destroyed by the Qin army scouts, Su Bu Baye did not dare to slack off, he knew better than anyone else the methods of the current Shan Yu. Although it is said that you may be punished for misreporting, if you don't report it, if you are singled out afterwards, it will only be a dead end.

When Su Bu Ba Page asked to see him, Mao Dun was discussing important matters with the newly sealed Right Xian King and the Left and Right Bone Duhou in the big tent. Today's Xiongnu Shan Yu Maodun killed his father Tou Man, and Shan Yu seized the position of Shan Yu.

Mao Dun Shan Yu, the surname is Zhu Yu, Mao Dun is the name. The word Maudun means a powerful head wolf in the meaning of the Huns.

Mao Dun was originally the crown prince of the Xiongnu, but Tou Man Shan wanted to establish the son of the current favored Yan clan (Xiongnu queen) as the crown prince, so he sent Mao Dun to the Yue clan as a hostage, and then Tou Man immediately sent troops to attack the Yue clan.

The Yue clan was furious and wanted to kill Mao Dun, but Mao Dun got the news in advance and fled back to the Xiongnu by stealing the horse.

I don't know if Tou Mandan Yu was confused or because he was soft-hearted for a while, Tou Mandan Yu saw Mao Dun fleeing back, not only did not kill him, but gave Mao Dun an elite 10,000 iron horsemen and let him lead it.

But Maudon was not grateful to Touman for this behavior. Mao Dun, who has always held a grudge against Tou Man, invented the "Ming Di" to train the 10,000 iron cavalry that Tou Man gave him.

Maudun first shot his beloved horse mount, and then his beloved concubine. Soon these iron horsemen were completely loyal to Maudun, and no one dared to disobey any of Maudun's orders, especially when Ming Di arrived, it must have rained down arrows.

At this time, Mao Dun began his real purpose of killing his father and seizing the throne, taking advantage of the "Spring Festival" of the first month tribe in the first month of this year (the first year of the Second Emperor, 209 BC), Touman came out to hunt, and shot Touman Shan Yu with a Ming Di.

To Mao Dun's surprise, in addition to Tou Man's personal guards, the two major tribes of Huyan and Lan did not react too violently to Tou Man's death, and even did not help Tou Man's personal guards resist Mao Dun's massacre.

Mao Dun, who received the support of the Huyan clan and the Lan clan, immediately led the army to kill the big tent of Tou Mandanyu, and killed his stepmother, half-brother, and ministers who opposed him, and then established himself as Shan Yu.

After becoming Shangdanyu, Mao Dun immediately named the leaders of the two major tribes of Huyan and Lan who supported him as the left and right bone duhou (equivalent to the left and right prime ministers of Great Qin), and stipulated that these two important positions could only be held by the clansmen of these two major tribes in the future, completely subduing the Huyan clan and the Lan clan.

The Yue clan in the west of the Xiongnu and the Donghu tribe in the east saw the civil strife of the Xiongnu and began to encroach on the pastures and land that originally belonged to the Xiongnu.

The reason why Mao Dun sent troops south this time was not because of Su Yue's simple demagoguery, but because he came to seize Henan and Hetao Plains, which were garrisoned by 300,000 well-equipped Great Qin soldiers south of Yinshan.

With the permission of Mao Dun, Su Bu Baye strode into the account, knelt down on one knee and touched his chest with his palm, bowed his head respectfully: "Report the great plough to be alone, yesterday it was said that a team of scouts in the camp has not returned, and your servant Baye thinks that it was done by the Qin army scouts wandering on the prairie." I am afraid that now the Qin people of Jiuyuan have prepared for the arrival of the great plough. ”

The Huns called the sky "plough", and "Gu Tu" in the Xiongnu language means son; Therefore, "holding the plough alone" means "a great prince like the son of heaven."

Originally, Subu Baye was ready to be punished by Mao Dun, but to his surprise, the three people in the tent, Mao Dun and the left and right Gu Duhou suddenly laughed out loud after hearing his words and glancing at each other.

Mao Dun smiled and asked rhetorically: "My prairie eagle, who told you that this order is to bring hundreds of thousands of warriors from my prairie to attack the Qin people this time?" ”

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