The Great Earthquake Pass is also called Longguan at the end of the Sui Dynasty, because it is named after the construction on the eastern slope of Longshan Mountain, in the Western Han Dynasty, Emperor Wu of the Han Dynasty led a hundred officials to the Kongtong Mountain to parade, passed through the clear water, crossed the Longguan, because the thunder shocked the horse, the descendants called the Great Earthquake Pass.

During the period of the Three Kingdoms, this area was in the place where Shu and Wei were contested, and Sima Yi built a city at the mouth of the Taishi River, also known as Sima Lei; Zhuge Liang built a city at the mouth of the Nandao River, also known as Zhuge Fortress, and the two military bases faced each other.

In the first year of the Northern Zhou Dynasty and the first year, the pass was set up here, and the checkpoint was heightened and thickened, as one of the fortresses that entered Guanlong in the west of the river.

Xiongguan is majestic, but it is not very big, it becomes a square, it becomes a mile each, it opens two gates of east and west, there is an urn city built at the east gate, the north and south are by the mountains and rivers, it is the only way to pass through the traffic.

Hou Junji personally led people to explore the bottom line around here, and felt that in a radius of dozens of miles, if you want to enter Fufeng County, this pass must be taken, otherwise, you will have to bypass seventy or eighty miles, and it is very troublesome to take another road, which is not conducive to marching and transporting grain and grass.

If you don't win this pass, it will be like a fish in your throat, and the long mountainous area will always be under the control of the Tang Army.

The slope of the west of the Kansai is steep, the surrounding mountains are shielded, only a canyon between the peaks can reach the pass, and there is a tendency of "one husband is the pass, ten thousand people cannot reach".

Surrounded by mountains here, its landform is in the shape of "concave", which is a favorable terrain for the garrison. The east and west roads of the pass are about two meters wide, and the ground is lined with pebble official roads, and it is difficult for the army to deploy if the city pass is attacked.

"Conventional siege warfare, definitely not good, rush up in rows, only a few meters of space, the rest are mountains, riverbeds, must be filled in all in order to spread out the soldiers and horses for attack." Hou Junji stared at the Great Earthquake Pass, a little helpless.

At this time, Hou Junji couldn't help but guess in his heart: "If Your Majesty uses soldiers, how should you win the pass?" ”

"Order, send a scout team, find out all the terrain nearby, and those commanding heights on the top of the mountain, all arrange sentry posts to pay attention to every move in the Tang army's city."

"Yes!" The lieutenants and lieutenants beside him gave up their orders.

Hou Junji pondered for a moment, and asked the army to write a letter to the imperial court, which needed to increase troops and strengthen its strength.

………

The problems encountered on the front line have been fed back to Shangtai City.

Luo Zhaoyun was anxious about the officials of the Privy Council, Guo Xiaoke, Du Ruhui, Zhu Suiliang and others, around the topographic map, discussing countermeasures to break the enemy.

Du Ruhui was deeply knowledgeable and explained: "Your Majesty, the status of the Great Earthquake Pass in transportation and military is extremely important, and it is known as the "key to the Guanshan", and is regarded as the West Plug of the Guanzhong Fortress. Pan Yue defined Guanzhong as "east to Hangu Pass, west to Longguan", which can be described as the two ends of Guanzhong, and after this pass, it is the real hinterland of Guanzhong. ”

Luo Zhaoyun nodded, he had read historical materials before, and he had also seen such records, such as Hu Sanxing's note "Zizhi Tongjian" that "there is Longguan in the west, Hangu Pass in the east, Wuguan in the south, Linjin Pass in the north, and Sanguan in the southwest".

Chu Suiliang said: "This pass is located in a remote location, in the mountains, and when it is attacked, the soldiers and horses cannot be opened, which is quite difficult. ”

Luo Zhaoyun is also pondering, since the conventional battle can't be played, then he can only use tricks, and if he doesn't play cards according to common sense, how can he strangle the people and horses in the city to death in the cradle?

"Remote, rough roads?" Luo Zhaoyun muttered to himself, and finally asked: "Is there any information to reply, how many garrisons are there in the city, and how long can the grain and grass last?" ”

Guo Xiaoke said: "Yes, according to intelligence, the garrison originally had 50,000, and it was the crown prince Li Jiancheng who commanded it to defend this pass and resist the invasion of our army, and then Chai Shao and Li Xiuning arrived with 30,000 horses, a total of 80,000 troops. It is said that the grain and grass can last for more than 20 days, and according to the time of the intelligence, it can still last for half a month. ”

Luo Zhaoyun smiled slightly: "If 80,000 people have no food and grass to eat, how long can they last?" ”

"This, without grain and grass, the 80,000 army will naturally abandon the city and flee, but the Tang court will definitely continue to send people to escort grain and grass over, and there will be no shortage of food!"

Luo Zhaoyun showed an unfathomable smile, the mountain road was rugged, and after the grain and grass convoy entered the mountain road, it moved slowly, lined up with long snakes, and it was difficult to take care of the head and tail, so it could carry out a surprise attack.

Then send someone to inform the city that the Tang army is mixed with the fine work, and the destruction of grain and grass will have an unexpected effect.

He grasped this idea, conceived it boldly, and felt that he should send surprise troops around the mountains, and then ambush and cut off food for the Don army.

When Luo Zhaoyun said these tactical means, Guo Xiaoke and others expressed their support after hearing it.

Zhu Suiliang said: "If you can really do it, then the 80,000 Tang troops in the Great Earthquake Pass can only abandon the city and retreat." ”

Yu Zhining asked: "But who will be sent to burn the grain route of the Tang army?" ”

"Xue Wanqian is a brave general, very suitable for this kind of difficult task!" Luo Zhaoyun personally ordered the generals, and felt that Xue Wanqian was the most suitable to lead his troops deep behind the enemy's back to carry out vicious battles and sneak attacks.

Du Ruhui asked: "How to burn the granary inside the earthquake pass?" ”

Luo Zhaoyun's expression bloomed, and he smiled: "Haha, in this regard, I also have candidates, some fortress places, important cities, have been deployed in advance, and when the signal is released, naturally someone will cooperate with the action." ”

When everyone heard His Majesty's confident deployment, they immediately felt that things could be done.

"The rear has almost been reserved, and when the news is released, it is said that I will also drive the expedition in person, so that I can paralyze the Tang army, and wait for my relatives to fight, in fact, it is secretly convenient for our army's strange soldiers to go around the mountain road behind the Great Earthquake Pass, carry out an ambush, follow the example of Han Gaozu Ming to repair the plank road, and secretly cross Chen Cang!" Luo Zhaoyun said.

Zhu Suiliang said: "There is no problem, we can spread the news." ”

Guo Xiaoke couldn't help but ask: "Does Your Majesty really want to drive the expedition in person?" ”

"That's right, after the Great Earthquake Pass is taken, I will personally attack Fufeng County and put pressure on the Tang Army!" Luo Zhaoyun made up his mind, but in fact, he was not at ease enough with these generals, after all, Li Tang had a world in history, and he could not be sloppy in the slightest, only if he personally sat on the front line, strategized, commanded the three armies, and personally defeated the Li Tang regime, he could feel at ease.