Yunnei City, the domain of Jizhou in "Yugong"; Yu and Zhou, for the land of the state; In spring and autumn, it is the land of Beidi; During the Warring States period, its land belonged to Zhao, and then belonged to Qin Yanmen County; Pingcheng County, Hanyanmen County, also.

In 383, after the Battle of Weishui, the former Qin who unified the north collapsed and perished, and the various ethnic groups that had previously been conquered by Fu Jian became independent and established their own kingdoms. In 386, the head of the Tuoba tribe, Tuoba Jue, gathered the old tribe and took the throne. Soon after ascending the throne, due to the remoteness of Niuchuan, the capital was moved to Shengle. In April of the same year, he changed the name of the country to Wei, proclaimed himself the King of Wei, and was known as the Northern Wei Dynasty in history. In the first year of Tianxing in the Northern Wei Dynasty (398), Tuoba Jue moved the capital to Pingcheng, called the emperor, and was known as Emperor Daowu in history.

Pingcheng, the capital of the Northern Wei Dynasty, that is, the inner city of Guyun, after the Northern Wei Dynasty moved the capital to Pingcheng, it was expanded on the basis of Hanping City County. From Tuoba Gui moved the capital to Pingcheng, to Emperor Xiaowen of Wei moved the capital to Luoyang, the Northern Wei Dynasty built the capital in Pingcheng for 97 years, and after six emperors, it has become the political, economic and cultural center of the north at that time, and at its peak, Pingcheng Gyeonggi had a population of one million. It belonged to the largest city at that time, and even the Northern Wei Dynasty later built a vast Qishang siege around Pingcheng. Sai refers to the Great Wall, Saiwei means the Great Wall enclosed, Gi Shang Saiwei is the Great Wall built in the area of Pingcheng Gyeonggi, the huge siege of the capital of the Northern Wei Dynasty at that time Pingcheng and the Gyeonggi area of the entire encirclement.

This was once the center of the north, and even the center of the whole world. At that time, Pingcheng was divided into the imperial city, the outer city, and the Guocheng. Twenty miles outside the city, thirty-two miles around the outer Guo, there are twelve gates. Its Guocheng surrounds the palace / south of the city, and is built as a workshop. Fang opens the lane, the big one can accommodate four or five hundred, and the small one is sixty or seventy." Gyeonggi extends from Dai-gun in the east to Seon-mu in the west. The south and the Yin Pavilion are all involved. Its Jingdian "east to the valley military capital pass." It is west to the Yellow River and south to Zhongshan Pass. north to Wuyuan".

In addition, there are four directions and four dimensions, and eight commanders are placed to command the troops to guard, and the vast Qishang fortress is established, and six important military towns are set up in the north.

At the beginning of construction, Tuoba Gui was based on Chang'an and Luoyang in the Central Plains at that time.

One hundred years ago, the Northern Wei Dynasty moved its capital to Luoyang, and after that, the center of gravity of the Northern Wei Dynasty moved southward, and Pingcheng no longer had the status of the old capital. And at this time. Due to the internal class contradictions, which also became more and more acute with the increasing corruption of the Northern Wei government, the rulers became more and more corrupt, the rule of officials gradually deteriorated, and uprisings began to break out in the north. At the same time, Rouran in the northern grasslands continued to grow stronger and began to invade northern Xinjiang repeatedly.

Eventually, the Great Uprising of the Six Towns in the North broke out, followed by the Hebei Uprising, the Shandong Uprising, and the Guanlong Uprising, and the Northern Wei Dynasty finally perished. It was divided into the Eastern and Western Wei Dynasty, and was finally replaced by the Northern Zhou and Northern Qi until the Sui Dynasty finally dominated the world.

Pingcheng, the once most prosperous capital of the Northern Wei Dynasty, is also constantly declining. In just one hundred years, it has fallen from the largest city in the world to a decaying small city on the northern frontier.

Before the Northern Wei Dynasty moved its capital. In Pingcheng, Sizhou Dai Yin, leading four counties. Pingcheng, Taiping, Wuzhou, Yonggu. After the capital was moved, Sizhou was changed to Hengzhou. By the time of the Northern Qi Dynasty. In the old dynasty, the capital of Heng'an Town, changed to North Hengzhou, moved to Taiping County, 30 miles west of the old capital, and North Hengzhou consists of Anyuan, Linsai, Weiyuan, Linyang four counties. The Northern Zhou Dynasty destroyed Qi, moved the county to the west, renamed Yunzhong County, and Heng'an Town was subordinated to Shuozhou.

After the establishment of the Sui Dynasty, because the father of Emperor Yang Jian's name was Yang Zhong, in order to avoid avoiding the change of Yunzhong to Yunnei, the governance remained unchanged, and it was subordinate to Mayi County and governed Heng'an Town. After the abolition of the county, the second-level division of the state and county was stopped, and Yunnei was directly subordinate to Shuozhou.

Although the Sui Zhiyun is the original Han and Wei Dynasty Ping City, but in fact, the address has already moved west, and the old capital of the Northern Wei Dynasty, Ping City, is actually the Heng'an military town of the Sui Dynasty today. The once prosperous capital of the Northern Wei Dynasty has long been abandoned, and it is just more than 1,000 towns and border troops stationed and guarded.

However, although it is no longer prosperous, it is still very important militarily.

Since the opening of the Sui Dynasty, there have been frequent wars with the Turks, except for the northwest direction, in the wars in the north, the Turks invaded from the Saishang every time, mostly from Yunnei, and then attacked Shuozhou directly along the Datong Basin. Every time the Sui Dynasty went out to conquer the Turks, it also went out of Shuozhou to take the ancient road in the clouds and then to the white road.

Since the Datong Basin, the largest basin at the northeast end of the river, is located between the Guanshui Mountain, the Heng Mountain and the southern side of the Mongolian Plateau, the low mountain mouth in the north of the basin provides a convenient passage for the influx of nomads from the northern part of the basin. The Sanggan River originates from Guanshui Mountain, passes through the Datong Basin, and flows into Hebei. In this way, once the iron horses of the nomads outside the Saiwai enter the Datong Basin, they can enter Hebei along the lowlands of the Sanggan River valley to the east, and knock directly in front of the Yongguan Pass; It can also pass the Taihang Mountain from the mouth of the flying fox, and detour to the southwest side of the thistle.

For the steppe tribes, this is the best offensive line.

At the beginning of the Western Han Dynasty, the Xiongnu Mao Dunshan Yu led a large army to pour in, besieged the Han Dynasty ancestor Liu Bang in Pingcheng Baishan Mountain. After the siege was lifted, Liu Bang carried out recuperation, made peace with the Xiongnu in the north, and carried out strategic defense, once stationed heavy troops here, connecting Yuyang and Shanggu in the east, Yunzhong and Wuyuan in the west, and protecting the north.

In the first year of Shiguang of the Northern Wei Dynasty, the Rouran Khan Da Tan heard that the Ming Yuan Emperor of the Northern Wei Dynasty had died, and immediately led 60,000 cavalry to attack Yunzhong, killing and plundering the people, capturing the old capital of the Northern Wei Dynasty, Shengle, and besieging the city in the clouds. The new emperor Tuoba Tao of the Northern Wei Dynasty was only sixteen years old at the time, but since he was twelve years old, he had gone to Hetao to guard the Great Wall to resist the invasion of the Rouran people, and the military affairs of the border fortress were very impressive, so he was very familiar with the tactics of Rouran, and he tried his best to lead 20,000 cavalry into the clouds to aid him. There were many honor guards of the Rouran people, and the future Emperor Taiwu of Wei Tuoba Tao surrounded more than 50 heavy, but in the end, the sixteen-year-old Tuoba Tao defeated the Rouran army with fewer victories. The following year, Tuoba Tao counterattacked in a big way, dividing his troops into five ways to attack Rouran, and Rouran was defeated again.

And in history, there have been too many wars in this land, and countless great wars have been fought here.

The land is lonely and bleak. The wind blew through the dead grass, revealing piles of bones buried in the soil. The bones of horses, camels, and men can be found near and far, as well as broken, rusted knives, guns, and arrows. They lay there quietly, decorating this dead ancient battlefield.

Several eagles streaked across the sky, making a few sharp chirpings from time to time, as if to foreshadow some ominous signs.

This ancient battlefield, which had been silent for a long time, was finally awakened again, and Du Yan, the governor of Shuozhou, dispatched 3,000 soldiers and horses under his command, led by Zhao Zhongqing to reinforce Yunnei. Guard the northern end of this important passage.

Intelligence has shown that the Turks are moving faster than the imperial court expected. They were quite swift, and Datou and Dulan had united. No, that's already outdated intelligence. The current information is that Du Lan has surrendered to Datou after his defeat in the battle with Datou last year. Now in the entire Turkic Turks, there is only one Turki Khan left, who refuses to recognize the position of the Great Khan of Datou. Datou came quickly, and his soldiers and horses had been transferred to the Jinshan line, the center of the eastern and western Turks, as early as last year's battle with Dulan. When Du Lan finally surrendered completely, and the rest of the little khans also expressed their submission, Datou finally launched an attack on the Sui Dynasty.

A few days ago. The envoy to the Mobei Turki tribe, Changsun Sheng, sent back an urgent report that the Turki had been defeated and was now fleeing eastward, without a trace.

Almost at the same time as this news arrived, Du Yan's scouts had already discovered the assembly and movement of the Dulan and Datou armies, and they were heading south.

Hearing that the Turks had finally launched an attack, Gao Gong, who had just arrived in Taiyuan, was very surprised, the Turks came earlier and faster than the imperial court expected, and Gao Gong immediately adjusted his deployment. Let Du Yan, the governor of Shuozhou, send troops to reinforce Yunnei and Heng'an, who were at the forefront first, and then he led the army north to reinforce.

Zhao Zhongqing led 3,000 soldiers and horses and advanced along the Sanggan River.

The order Zhao Zhongqing got was very clear, no matter what, he had to defend Yunnei and Hengan. For the Sui army. If Yunnei and Hengan are lost, then the entire Shuozhou will not be able to hold it. Shuozhou is a huge wooden basin, and Yunnei is the northernmost gap. It is an outlet and an inlet. Once this opening is opened. Shuozhou is a smooth road. The enemy can quickly attack the foot of Gouzhu Mountain and hit in front of Yanmen Pass. Although Yanmen is one of the nine stoppers in the world. But Gao Gong didn't want the Turks to fight the pass. What's more, after entering Shuozhou, the Turks can not only quickly reach the Yanmen Pass, but they can also enter Hebei along the lowlands of the Sanggan River valley to the east, and knock directly in front of the Yongguan Pass; It can also pass the Taihang Mountain from the mouth of the flying fox, and detour to the southwest side of the thistle.

Although there is still Yang Lin in the east, if he lets the Turks into Hebei, it will be his dereliction of duty.

They finally won the opportunity to lead the Northern Expedition, not for an ugly battle, they wanted a clean and happy defeat of the Turks, in exchange for the emperor's appreciation and commendation, and to add points to the crown prince.

On the ancient road in the clouds, there is a large army with no end in sight also marching.

This is the Dulan Division, which was defeated in the Turkic Civil War, and as far as the eye can see, a banner flutters like a sea, swords are better than snow, and spears are like a forest. His wife committed adultery with a Sogdian servant behind her back, and Tuli spread the scandal and killed his wife in anger, and then the Sui Dynasty refused to marry the princess again, but married Tuli instead, and made it so grand that he lost face. A sense of anger accumulated in his chest, and Datou moved frequently, constantly attracting a few little khans to betray him, he sent troops in anger, but was embattled on all sides, ambushed on all sides, and finally defeated Datou, defeated. There is nothing to be done, Da Tou is bent on becoming the Great Khan of the Khanate, Du Lan knows that the general trend is going, but he is not willing to give up the sweat position in vain. He made a request to Da Tou, first, he had to be the Khan of the East, and at the same time, Da Tou had to help him destroy Tuli, and hand over Tuli's territory soldiers and horses and the princess of the Sui Dynasty to him. As long as Datou agreed to this request, he immediately surrendered to Datou, truly surrendered the position of Great Khan, and obeyed Datou's order from then on.

Datou didn't want to agree to this condition at first, and in the previous battle, Tuli sided with Datou to help him attack him. Datou wanted to make peace with the mud and make peace, but in the end, the peace talks failed. Datou's condition to Tuli was to let him hand over the princess of the Sui Dynasty to Du Lan, and also to compensate Du Lan with a large number of cattle and horses, but this result was rejected by Tuli without hesitation, and even Da Tou's request for Tuli to send troops to respond to his attack on the Sui Dynasty, he refused to agree. In the end, Datou still agreed to Du Lan's conditions and killed Tuli. However, Da Tou also made a request, that is, Du Lan can be the Khan of the East, and he can also get the Tuli Sui Dynasty princess and population cattle and sheep, but he must send troops with all his strength to attack the Sui Dynasty with him.

Datou's plan to attack the Sui Dynasty was no different from the plan of the Turkic Great Khans in the past, but because of the betrayal of the Turks and the annexation of several tribes in the east to the Sui Dynasty, Datou's plan changed somewhat from the previous offensive plan, that is, it was originally divided into three major directions to attack, and now it has become two directions. (To be continued......) R1292