Jiangyouguan is surrounded by mountains on all sides, and the terrain is dangerous.

In the northwest, there is a confrontation between Fengyi Mountain and Eagle's Beak Rock, and the Fujiang River flows through it. The entrance is high and the water is urgent, and it is called Mingyue Pass, also called Mingyuedu.

There are Confucius Rock and Arrow Pole Ridge standing side by side in the southeast of Guan, the cliff is towering, and the height is unclimbable.

The pass is surrounded by four mountains, is the throat of Sichuan to Gansu, and has always been an important town for soldiers.

Before Zhuge Liang's death, Shu Han had been stationing heavy troops at Jiangyou Pass, in order to prevent the Wei army from Longnan from invading Shu along the Yinping Road.

After Zhuge Liang's death, due to the continuous corruption of the Shu Han regime, the garrison of Jiangyou Pass was gradually relaxed, thus giving Deng Ai the opportunity to launch a surprise attack.

As the aboriginal force in the game, the Demon Clan is unlikely to know the history of Shu Han, but they are very aware of the importance of Jiangyou Pass.

So even though Ma Feng Biao had done their best, they had always stationed 10,000 demon defenders in Jiangyou Pass.

When Ning Yuan led an army of 200,000 to approach Jiangyou Pass, they began to pay attention to their whereabouts, and sent elite ape-man scouts to uproot enemy outposts along the road.

In order to annihilate all the enemies in Jiangyou Pass in one fell swoop and not give the enemy a chance to report the news, Ning Yuan left the flying legion in a valley twenty kilometers away from Jiangyou Pass, and then personally led the ape army to touch Jiangyou Pass under the cover of night.

When he touched a kilometer away from the pass, Ning Yuan immediately asked people to notify the Seraphic Legion, which was already in place, to start moving.

After receiving Ning Yuan's action order, five thousand Seraphic warriors immediately descended from the sky and launched a surprise attack on the demon defenders on night duty on the pass.

After killing the night guards on the north side of the pass, the Seraphic warriors immediately lowered the ropes they had prepared in advance from the wall, and then immediately got up and rushed to the southernmost part of the pass.

By the time the Seraphic Warriors began to act, Ning Yuan had already led the Ape Legion to rush towards the city wall.

When they came to the bottom of the city walls, the demon defenders on the walls had just been attacked and killed by the Seraphic warriors.

So they immediately took advantage of the fact that the demon defenders in the pass had not yet reacted, and climbed directly along the ropes hanging from the city wall.

When the demon defenders in the pass woke up from their sleep, picked up their weapons and rushed to the city wall, Ning Yuan and thousands of ape-man warriors were already standing on the city wall waiting for them.

At first, the demon defenders in the pass did not know how many enemies had appeared outside the city, and they thought about driving them down and retaking the walls.

However, as more and more ape warriors climbed to the top of the city, and finally Ning Yuan personally led the ape warriors to kill them from the city wall, they felt that something was wrong, and wanted to turn around and flee to report to the clansmen in the rear.

However, it was already too late, and the five thousand Seraphic warriors firmly controlled the only exit to the south of the pass, sealing off all their retreats.

With the last demon warrior in the pass lying in a pool of blood, the classic night raid battle came to an end.

After sending someone to dispose of the corpse of the demon warrior, Ning Yuan led the army to repair at Jiangyou Pass for two days, and then directly advanced into the Sichuan Basin on the third day.

After Deng Ai took Jiangyou Pass without blood, he chose to directly wave his army south, defeated Zhuge Zhan, who took the initiative to go out of the city to seek war, in Mianzhu, and then the troops reached Chengdu, and finally forced Liu Chan, the queen of Shu, to surrender.

The reason why Deng Ai was able to destroy Shu with 2,000 people was mainly because the Shu Han regime at that time was extremely corrupt, and after Liu Bei's generation died after taking the lead, Shu Han no longer had a general who could handle it except Jiang Wei.

At that time, many Shu Han officials believed that the general situation was irreversible, so they instigated Liu Chan to surrender Kaicheng.

However, Deng Ai's entry into Shu was not suitable for Ning Yuan, even if the number of troops led by Ning Yuan was a hundred times that of Deng Ai.

Because the Condor Empire and the Demon Clan are enemies of life and death, no matter who wins the final victory between them, they will find a way to wipe them out.

What the Demon Clan wanted to destroy was Ning Yuan and the Angel Clan behind him, and Ning Yuan would also kill every Demon Clan.

Therefore, after capturing Jiangyou Pass, Ning Yuan could no longer follow Deng Ai's set.

Deng Ai chose to attack Chengdu, the hinterland of Shu Han, and wanted to force Jiang Wei, who was guarding Jianmen Pass, to return to the rescue, but he never expected that before Jiang Wei could return to help, Shu Han would be directly destroyed by him.

Unlike Deng Ai, after Ning Yuan captured Jiangyou Pass, his next target was Zitong.

Zitong, the necessary place of the ancient Shu Road, the Shu Road is also coming to an end here.

Because after Zitong, the Shu Road is no longer difficult, and the front is the fertile Yizhou Tianfu - Chengdu Plain.

Therefore, Zitong is actually the last place on the Shu Road that can rely on geographical advantages to defend.

If the Sword Pavilion is the throat of Sichuan Shu, then Zitong is the first major point of Sichuan Shu!

The Sword Pavilion is lost, and Shu is in danger. Zitong was lost, and Shu died.

If the Sword Pavilion is lost, then Zitong can completely become a front-line bunker and become a second Sword Pavilion in the spiritual sense.

First of all, the complex geographical environment of Zitong has created such a natural defensive position, and it can advance or retreat, enter Hanzhong, and retreat to rely on Fushui.

There are mountains in the east, Jiameng in the north, Jiangyou in the west, and Fujiang River in the south. As long as it is repaired well, the deep ditch and high barrier are broken, how difficult it is!

In addition, Zitong also has a great geographical advantage, the last dangerous mountain on the Shu Road is in Zitong, that is, Zitong Mountain (now known as 'Qiqu Mountain').

As long as it is into Shu, it will pass through this place, which shows its importance.

As long as people walk out of Qiqu Mountain, there is a smooth road ahead, and it is difficult to stop it.

The north of Zitong is the Sword Pavilion, although the Jianmen Pass has a tendency to be opened, but for the sake of insurance, the Demon Clan still arranged a second line of defense in Zitong, once the Jianmen Pass is lost, the withdrawn demon army will directly retreat to Zitong.

Ning Yuan and Ma Feng knew that the Demon Clan would not let such a strategic place as Zitong go unattended, so they planted a big thunder for the Demon Clan in Zitong, and once it was detonated, it would be enough to make all the Demon Clans in the land of Sichuan and Shu be shattered.

In order to prevent the Sword Gate Pass from being breached by the Condor Army, Ma Feng Biao transferred all the available soldiers of the Demon Clan to the front line of the Sword Pavilion, and made a posture of defending the Sword Gate Pass.

However, how could a regent who had "done his best" for the Demon Clan not leave a way back for the 200,000-strong army on the front line?

Zitong is a back road set aside by Ma Fengbiao for the demon army guarding the Sword Gate Pass, and it is also the last insurance in Shudi.

Considering that once Zitong is lost, the entire Shu land will no longer have any natural dangers to defend, so the demon clan in the land of Sichuan and Shu is ready to live and die with Zitong.

Now, Zitong is not only the last line of defense for the demon clan to guard Sichuan and Shu, but also a major place for them to stock up on grain.

The grain and grass materials needed by the defenders of the Sword Pavilion were all transported from Zitong, and they were transported once every two months.

Because there is Jiange in the north, Jiangyou in the west, and Fujiang in the south, as long as these places are not lost, Zitong will not encounter any danger.

Therefore, Ma Feng Biao only arranged 5,000 demon defenders, 10,000 reserve warriors, and 30,000 ordinary demon clansmen who were responsible for transporting food and grass materials to the defenders of the Sword Pavilion in Zitong.

Ma Biao arranged it like this in order to provide Ning Yuan with an opportunity to surprise Zitong.

As long as Ning Yuan led the army to take Zitong, then the 200,000 Sword Pavilion defenders would immediately become turtles in the urn, and after two months, they would be in crisis because they ran out of food.

And after Ning Yuan led the army to capture Zitong, the biggest concern of their strange army, the problem of grain and grass, would be perfectly solved.

The grain and grass hoarded in the Zitong area were enough for Ningyuan's 200,000 troops to eat for several years.

After having enough food and grass, they could defend Zitong to the death, and then wait for the Sword Pavilion, the last demon army in Shu, to perish.

The grain and grass materials hoarded in the Zitong area were also the last gift that Ma Qibiao gave to Ning Yuan, and at this point, the transaction between them was all over.