Tongguan is bordered by the Yellow River in the north and on the mountainside in the south. "Notes on the Book of Water" contains: "The river flows south of Tongjiguan Mountain in the Guan, because it is called Tongguan. ”

As the gate to the east of the country, Tongguan has always been a battleground for soldiers! Choke Chang'an to Luoyang post road to rush, is the key to enter and exit the three Qin, since the end of the Han Dynasty, Tongguan has been the east into the Central Plains and the west out of the pass, the west of the must pass through, the key pass of the pass, known as the second pass in the world, enjoy the reputation of "the first danger in Jin", "the throat of the four towns", "one hundred and two passes".

Tongguan Guancheng was originally built on the loess plateau, the Sui Dynasty moved south for several miles, and when Tang Wu Zetian, the Guancheng was moved north to the plateau, and Tongjin County was set up. The situation of Tongguan is dangerous, there are Qinling Mountains in the south, there is the forbidden valley in the southeast, and there are 12 cities in the south of the valley; There are Wei and Luo Erchuan in the north, and the Yellow River hugs down, and the west is near Huayue. The surrounding mountains are even mountains, peaks are even peaks, the valleys are deep and the precipices are exclusive, the mountains are high and the roads are narrow, and there is a narrow sheep intestine path in the middle, and only one car and one horse can be allowed to go back and forth. People often compare the situation here with "the danger of the road and the ape" and "the danger of the road stopping at Tong Pass in the world".

Since the founding of the Tang Dynasty, there are heavy guards in Tongguan, since the beginning of the Yuan Dynasty, the peace has been maintained for a long time, most of the inland passes are deserted, even the three passes of Jingcheng in the east and north of the river are increasingly barren, only Tongguan, repaired year after year, has always remained intact, and even more strict than when the Tang Dynasty opened the country. The tall and majestic brick and stone city wall, like an iron wall, cuts the hundred and two mountains and rivers into two sections, and the dangerous mountain and river adds the majesty of the moat to this majestic pass in the world. Walking under the Tong Pass, even the soldiers who can't see the guards will be shocked and frightened by the iron-like city wall.

Bu Yunfei wore the uniform of an ordinary soldier, wore a felt hat and cloth shoes, stood in front of a mound under Tongguan, looked at the towering pass, and sighed.

He once came to Tongguan, and it was in the distant 21st century! Or rather, a past life and an afterlife!

The relationship between Tongguan and history is self-evident! This pass has almost become a symbol, reappearing repeatedly in China's 3,000-year-long history of writing.

Even, Tongguan has become a historical image! When this term appears on paper, then, under the paper, there is the beacon fire and wolf smoke, the galloping war horses, the arrows covering the sun, the strong men strangling, and the rise and fall of the dynasty...... and so on magnificent historical pictures.

As a researcher of Tang history, if you don't come to Tongguan to experience it in person, you are an unqualified researcher!

In the 21st century, or in the previous life, Bu Yunfei was subdued by the danger and majesty of Tongguan, although, after thousands of years of vicissitudes, Tongguan in the 21st century, has long been without the majesty of the year, it is just a tourist attraction, close the pass, everywhere are colorful tourists, the slaughter of the millennium war has been washed away by the idleness of the tourists!

Today, returning to Bu Yunfei thousands of years ago, facing this Xiongguan again, he suddenly found that Tongguan was like a breathing giant spirit god, spewing scorching and angry flames!

Thousands of miles of snow fields came to an abrupt end in front of Tongguan!

There is no snow on Tongguan, and on the iron-walled city wall, there is not even ice cubes formed after melting snow!

Thousands of miles of wilderness, silver and white, only Tongguan, like a black blade, pierced the ice and snow world.

"Zhuang Tongguan!" Bu Yunfei's heart sighed.

"General Bu, there is a recruiting flag under the gate!" Chao Yongzhi stood aside and pointed to the city wall and said. He was also wearing the uniform of an ordinary soldier of the Tang Army.

There is an earthen platform there, a big red flag, under the gloomy city wall, fluttering in the wind, becoming the only bright color of this black and white world, like a dividing line, between the Kanto silver and white world and the Tongguan dark world!

"Big brother, let's go over!" Ba Yegu said that he was also wearing the Tang Soldier uniform, but the armor was too small, as if it was tied to his body, and it was tight.

"Don't worry, take another look!" Bu Yunfei's gaze left the banner under the city, and threw it to the east, and a large road loomed in the wasteland jungle. That's where they came from.

Two days ago, Bu Yunfei, Ba Yegu, and Chao Yongzhi left Changling Village and walked south on the mountain road after the snow.

Along the way, the snow was covered with snow, the silver silk was hanging, and the place where it passed was deserted, and the people of Shaanxi County had already fled. Even the wild beasts, it seems, are nowhere to be seen because they are afraid of fire.

At noon, the three of them went out of the mountain, and saw the city of Shaanxi County from afar, on the snowfield outside the city, there were scattered corpses of soldiers and horses and broken flags, crows were circling and flying on the snowfield, eating the corpses that had been frozen into popsicles, and the banner of An Lushan was fluttering on the head of the city.

Cui Qianyou's reaction was even faster than Bu Yunfei imagined!

Only half an hour after the vanguard of the Tang Army under Gao Xianzhi left the city, Cui Qianyou's army rushed over. The Tang army in the city of Shaanxi County had a total of 70,000 troops, but they had no fighting spirit, and after entering the field, they were even more panicked, and everyone wanted to flee to Tongguan quickly, and they had no intention of fighting at all. When Cui Qianyou's cavalry braved the wind and snow to rush over, the troops behind the Tang Army almost collapsed at the touch of a button.

Most of the Tang army had already left the city, Cui Qianyou's cavalry quickly caught up with the last Tang infantry, in the field, the infantry failed to organize the slightest resistance, when the rebel iron cavalry rushed in front of them, the panicked Tang army instantly collapsed. The cavalry of the front army knew that the infantry was attacked, but they ignored it and fled westward. Under the city of Shaanxi County, it became a slaughterhouse, and the Tang army became a group of lambs to be slaughtered, and thousands of people were killed by Cui Qianyou's cavalry, and the rest had to retreat to the city.

Cui Qianyou only left 3,000 men and horses to attack the city of Shaanxi County, and led a large number of men and horses to the west to storm the Tang army, the Tang army collapsed on the whole line, scattered and fled for their lives, and the hundreds of miles from Shaanxi County to Tongguan were full of scattered Tang army generals, and the banners of heavy grain and grass were scattered all over the place. Gao Xianzhi retreated to Tongguan, 70,000 Tang troops, only 30,000 remained, and all the heavy grain and grass were lost.

The 10,000 Tang troops who were surrounded in the city of Shaanxi County, seeing that there was no hope of breaking through, actually laid down their arms and surrendered to the 3,000 rebels.

Since then, the rebels have occupied the entire territory of Henan and marched to Tongguan.

Fortunately, the 100,000 Tang troops mobilized from the Anxi Formation arrived at Tongguan in time, which stabilized the position.

The two sides confronted each other at Tongguan.

For the rout of the Tang army and the change of hands in Shaanxi County, Bu Yunfei had already expected it.

This can't be blamed for Gao Xianzhi's incompetence, as the commander of the Tang Army, he has done his best.

The rabble of 70,000 is not at all the opponent of the battle-hardened rebels, retreating to Tongguan, preserving strength, defending according to danger, and ensuring Guanzhong, this is the only correct choice at present.

Sadly, the Tang court didn't see it that way.

In particular, Gao Xianzhi once dangled a shot under the city of Shaanxi County, concentrated 10,000 cavalry to attack more and less, and defeated the rebels for a while, which was originally Gao Xianzhi's trick to retreat to confuse Cui Qianyou, but in the eyes of the imperial court, it became evidence that he could fight and avoid war!

Gao Xianzhi's tragedy is already doomed!

The main force of the rebels has already moved westward, and the rebels in the city of Shaanxi County are sticking to the city and dare not go out at will for the time being, and the outside of the city has become an undefended area.

Bu Yunfei and the three of them almost swaggered around the city of Shaanxi County and embarked on the road to the west.

The next day, fifty miles away from Tongguan, they met Cui Qianyou's main force.

Cui Qianyou's 30,000 horses, when they arrived under Tongguan, 100,000 Anxi soldiers and horses also arrived at Tongguan, Cui Qianyou did not dare to fight, and hurriedly ordered to retreat fifty miles, waiting for An Lushan's army to come to reinforcements.

Since An Lushan's rebellion, the Tang army that fought against it was the Tianwu Army, which was composed of temporarily recruited recruits, and the rebels almost never encountered decent resistance. However, the Tang army on Tongguan today is no longer a rabble composed of lazy market children and forbidden troops like embroidered pillows, but the world-famous Anxi elite soldiers. In front of the Anxi army, Cui Qianyou didn't dare to hold it up again. With only 30,000 troops and 100,000 enemy troops, they had to take the initiative to retreat and distance themselves from the Tang army.

The Tang army was newly defeated and demoralized, and Gao Xianzhi had no intention of attacking, so he could only retreat and defend himself, and the two sides distanced themselves and were in a state of truce.

Taking this opportunity, Gao Xianzhi erected a recruiting flag under Tongguan to collect the stragglers who had been defeated from Shaanxi County.

The 70,000 troops of the Tang Army withdrew from Shaanxi County, and only 30,000 people were able to reach Tongguan in formation. Of the 40,000 people, less than 20,000 were actually annihilated by the rebels, and most of them were routed and scattered.

A few days ago, the rebel army was in Tongguan, and the Tang army closed the gate, and these routs were scattered among the mountains and fields east of Tongguan, with no way to advance or retreat, and the day was precarious. Now, the rebels finally retreated, and the recruiting flag was erected under Tongguan, and the defeated soldiers immediately flocked to Tongguan like a group of peaks, which was their only way to survive.

In the jungle outside the pass, the three Bu Yunfei brothers intercepted a few Tang soldiers who had been scattered, changed into Tang army uniforms, and came to Tongguan, intending to mix in the rout and blend into Tongguan.

However, they seemed to be a step too late, and there was no one on the main road outside the gate, and the recruiting banners on the earth platform were also empty. It seems that most of the rout has already entered the pass, and the containment of the rout seems to have come to an end.

Tongguan closed the door tightly, closed and closed under heavy guard.

The crimson recruiting flag, like a spirit flag on a grave, fluttered alone under the gate.

"Big brother, let's go, go to that big flag, the generals there will definitely let us enter the customs!" Bano Gu was a little agitated.

"Wait!" Bu Yunfei said.

Without a large group of routs, Bu Yunfei was reluctant to take risks, after all, he was a "rebel general", going to the big flag alone, just afraid that he would be recognized.

"It's coming!" Chao Yongzhi pointed to the road below the mountain and said.

I saw that on the road down the mountain, the dust was flying, and a group of rout soldiers rushed along the road to Tongguan, these rout soldiers were scattered, their clothes and armor were in tatters, the men and horses were mixed, and there were no weapons in their hands, for those who were bent on fleeing for their lives, weapons were just a burden!

"Keep up!" Bu Yunfei said, and the three of them ran down the mountain, just in time to meet those routs.