After solving his worries, Wei Yan immediately led his troops to turn around, along the road of Shaanxi County, Mianchi, and Xin'an, and directly killed in front of Hangu Pass.

After Hangu Pass, it is Luoyang City.

With such a big movement, Xin Bi and Sima Zhao, who were in Luoyang, naturally got the news a long time ago.

Xin Bi was responsible for reporting the specific situation to the imperial court, requesting reinforcements from Hebei, and at the same time contacting the two counties of Hedong and Hanoi, and asking the two places to quickly send county soldiers to guard Chang'an.

And Sima Zhao directly led the 5,000 soldiers who stayed in Luoyang, and went straight to Hangu Pass under the starry night.

Here, before Luoyang, the last line of defense.

The Hangu Pass Guard will be Xiahou He, the seventh son of Xiahou Yuan, the general of the expedition to the west, and the Henan Yin appointed by Cao Wei.

Theoretically speaking, Xiahou He, as Henan Yin, could stay in Luoyang to govern, but he took the initiative to ask for orders to go out of the town of Hangu Pass and stick to this last barrier for Luoyang.

One thing to say, Xiahou Yuan's heirs are really much stronger than Xiahou Yuan's lineage.

Xiahou Yuan is in the same vein, there are Xiahou Ba, Xiahou He, Xiahou Hui, Xiahou Wei, Xiahou Rong and others, although they have their own strengths in practicing literature and martial arts, but most of them are still manufacturable. Xiahou Nan's vein, just one Xiahou Nan has already lost the face of this vein, not to mention that Xiahou Nan's two younger brothers also participated in framing Xiahou Nan together with Xiahou Nan's wife, Princess Qinghe, and this bit of shit in the family also made trouble in front of Cao Rong.

Really, the gap is really too big. I don't know how Xiahoudun educated the next generation.

Hawkers, it's far away, let's go back to Xiahou He.

Although Xiahou He himself has a high ambition and is willing to serve the country, he himself does not know much about military strategy.

It's not that he doesn't understand it at all, as Xiahou Yuan's son, Xiahou He still knows a little bit about military strategy, but what makes Xiahou He really famous is his eloquence. The people of the time said: clear argument and talent.

Therefore, he was stationed at Hangu Pass, and Sima Zhao was not at ease no matter what, so he hurriedly led his troops to Hangu Pass in person to preside over the defense of the pass.

Xiahou He was dissatisfied with this.

If you want to say that Sima Yi did this, then Xiahou He can still recognize it, after all, Sima Yi's qualifications are enough, and he has indeed shown good military talent over the years, he is not worried about Xiahou and guarding Hangu Pass, leading troops to guard, Xiahou He will not be a little dissatisfied.

But why are you Sima Zhao?!

In fact, the deeper question is - why do you Sima Zhao think that I can't hold this Hangu Pass, but you can defend it when you come?!

Isn't that a joke?

But fortunately, Xiahou He's open-mindedness and self-cultivation are very good, plus Sima Zhao always brings troops to help for national affairs, Xiahou He will not be awkward with Sima Zhao at this time.

There is only one worry: Yes, I am not familiar with military affairs, so I really don't have the confidence to block the attack of the Shu thief Wei Yan, and hold this Hangu Pass, do you Sima Zhao have this certainty?!

It's not a weird bar with Sima Zhao, Xiahou He is sincerely asking Sima Zhao, after all, as soon as the Hangu Pass is broken, Luoyang will be really dangerous.

And Sima Zhao could only smile bitterly at this, and replied to Xiahou He, "The only way to be loyal to the country is to do your best." ”

Just this sentence, Xiahou He is embarrassed to make something awkward with Sima Zhao This person is a person who risked his life to guard Guguan and fight for the foundation of the Great Wei, Xiahou He, as a general of the clan, what else can he say.

Directly handed over all the command rights and handed them over to Sima Zhao to command.

And Sima Zhao was not polite, and the current situation did not allow Sima Zhao to be polite.

It's really too bad.

From the perspective of the external environment, Luoyang's defense is very problematic.

Theoretically speaking, Luoyang is located in the loyalty of Henan County, with Hedong in the north and Gongwei in Hanoi, Hangu Pass in the west, Hongnong County outside Hangu Pass, Yingchuan County in the south, and Yanzhou in the east. There are people guarding all around, and it is not so easy to be breached.

But now the situation is completely different.

Hongnong County in the west surrendered without a fight, directly allowing the Shu thieves to drill into the heart of Si Li, while Yingchuan County in the south faced the siege of 70,000 Shu thieves, and once Yingchuan County was broken, it might even threaten Yanzhou in the east of Luoyang, so Sima Yi, who stayed in Luoyang, had to personally lead the troops to rescue.

Now Luoyang can only rely on the two counties of Hedong and Hanoi, as well as the last barrier on the west side of Luoyang, Hangu Pass.

The problems of the two counties of Hedong and Hanoi will not be taken care of first, just talk about this Hangu Pass. The current Hangu Pass is no longer the Xiongguan of the pre-Qin period.

Hangu Pass in the pre-Qin period was really a place where a husband could not be opened.

Prior to this, there were only three records of Hangu Pass being breached, but two of them were breached once by Liu Bang and Xiang Yu each in the troubled times at the end of the Qin Dynasty, when Hangu Pass was almost undefended.

Only once was lost in the battle between the two armies of Zheng'er Bajing, and the famous general who broke through Hangu Pass was Kuang Zhang of Qi State, which was so low-key that it was not recorded in the "Historical Records".

All in all, the Hangu Pass in the pre-Qin period was really very strong, but it does not mean that the current Hangu Pass is really strong.

The reason why Hangu Pass in the pre-Qin period was easy to defend and difficult to attack was that its special geographical location was the Loess Plateau in the west, the cliffs in the east, the Qinling Mountains in the south, and the turbulent Yellow River in the north.

The Hangu Pass is built at the mouth of a valley, and the cliffs and dense forests on both sides form a natural barrier, and the soldiers guarding the pass only need to guard the valley mouth to prevent the enemy from entering the pass.

But now, with the sinking of the water level of the Yellow River, a passage has gradually appeared in the location of the Yellow River in the north, which is relatively flat and very easy to pass.

This is equivalent to having a natural channel, whether it is entering Guanzhong from Kanto, or attacking Kanto from Guanzhong, you don't have to go to Hangu Pass, you can go around it directly.

The strategic value of Hangu Pass dropped instantly.

In the Han and Han dynasties, the Qinhan Valley Pass was basically abandoned, and its only role was to play the role of geographical coordinates, which was used to distinguish between the Hou of Guan Nei and the Hou of Guan Wai.

In the period of Emperor Wu of the Han Dynasty, Yang Fu, the general of Lou Chuan, because his birthplace was outside the Qin Hangu Pass, in order to get the reward of the Marquis of the Guannei, he played Emperor Wu of the Han Dynasty and requested the new Hangu Pass. At that time, Emperor Wu of the Han Dynasty also happened to strengthen the centralization of power and implement the policy of "expanding the eastern part of the Guan", so he agreed to Yang Fu's Shangshu and built a new Hangu Pass, that is, the Hanhan Valley Pass, and turned the original Qin Hangu Pass into Hongnong County, and set up Hongnong County to the west of the Hanhan Valley Pass.

Now Sima Zhao and the others are guarding, in fact, it is Hanhan Valley Pass.

As for Wei Hangu Pass, in fact, strictly speaking, it is really not a level. This was originally Cao Cao, in order to deal with the threat of Ma Chao, who occupied Tongguan, and ordered Xu Chu to build a simple city defense, which was used to hoard grain and grass in case Ma Chao sent a letter to Guguan in the east.

Since Cao Cao defeated Ma Chao at the Battle of Weishui, this place has no value and has been abandoned.

If you really want to say that it has strategic value, and at the same time the city defense is quite strong, the place that can be defended is still Hanhan Valley Pass.

But no matter which Hangu Pass it is, its current defensive difficulty is really great. After the water level of the Yellow River sank, the natural channel has always been there, and Hangu Pass has lost its strategic value.

To guard Hangu Pass, Sima Zhao not only had to guard the wall, but also had to send people to guard the natural passage that bypassed Hangu Pass, and the worst thing is that this passage is not only flat, but also very wide.

And now how many troops can Sima Zhao use to guard Hangu Pass?!

Eight thousand people.

5,000 people were sent from Luoyang to help, plus the 3,000 garrisons of Hangu Pass itself, a total of 8,000 people.

If Hangu Pass is still as dangerous as before, and it is impossible to bypass it at all, then 8,000 guards are enough.

But the problem is that now we have to guard the Hangu Pass, not only to defend the checkpoint, but also to guard the wide and flat passage on the north side that has been exposed because of the sinking of the Yellow River.

As for the Shu thieves, after occupying Hongnong County, not only did they have logistical supplies, but with the help of the Hongnong family, they used the ready-made state and county arsenals to explode 10,000 or 20,000 people temporarily, which was not a problem at all.

Although the combat effectiveness of these people is definitely not very good, they can be used as cannon fodder, but it is enough.

Under such a situation, Sima Zhaozhen does not have much confidence that he can hold this Hangu Pass.

Sima Shi, the elder brother who lost Pusakajin, now finally has new news.

With the support of the Hedong family, Sima Shi, who had returned from the defeat of Pubanjin, organized a second line of defense in Hedong, and pulled up more than 10,000 soldiers and horses to defend Hedong.

If you can get the help of this army and guard Hangu Pass together, then Sima Zhao's pressure will not be so great.

But the problem is, not to mention Sima Zhao, it is Xin Bi who announced the edict of Hedong County, asking them to lead troops to aid Luoyang as soon as possible.

In fact, everyone knows what these Hedong families are thinking. The soldiers made up by the Hedong family must have been used to defend Hedong.

Yes, Luoyang is very important, and everyone has a lot of interests in Luoyang, but the problem is, if the soldiers and horses of Hedong go to support Luoyang, and the Shu thieves change the direction of attack and cross the river north to attack Hedong again, what will the Hedong family use to resist? !

Of course, Luoyang doesn't want to lose the interests of the Hedong family, but if even the hometown is gone, even if Luoyang is saved, what practical significance does it have to the Hedong family.

Therefore, the hesitation of the Hedong family is actually to leave this Hedong army of more than 10,000 people to defend Hedong, instead of going to Luoyang to work for Dawei.

This is not a problem that Sima Shi can solve, Sima Shi's weight is not enough, maybe Sima Yi can convince these Hedong families, but the problem is that now Sima Yi is in Luyang.

Therefore, from the perspective of the external environment, Sima Zhao Shouhan Guguan is really no reinforcements outside, and there is no dangerous place to rely on. To a certain extent, the situation that Sima Zhao is facing now is really very similar to Ma Yan's street pavilion in history.

The avenue is wide, there is no danger to defend, so you can only camp on the road, fight hard, and buy time for Sima Yi to return to the army to rescue Luoyang.

dragged until Sima Yi returned to the army, then Luoyang still had the possibility of holding, if it could not be dragged to Luoyang and lost, Sima Yi himself would become a turtle in the urn.

Therefore, the pressure on Sima Zhao is really great.

(End of chapter)