As far as the terrain of Guangcheng Pass and Dagu Pass is concerned, Guangcheng Pass is relatively not too dangerous.

Guangchengguan is located in the south of Guangchengyuan, not far from Kongtong Mountain, although it also relies on the mountain of Kongtong Mountain, it can be roughly built on a high slope.

On the side of Guangcheng Pass is close to Guangchengze, this Heze is under the cliff on the side of the high slope where Guangcheng Pass is located, which can be regarded as blocking the passage of outsiders, and although the other side of Guangcheng Pass is a mountain cliff, it is also difficult for foreign enemies to cross, but on the whole, Guangcheng Pass is not built in the narrow terrain of the mountain col and cliff valley.

Therefore, the terrain in front of Guangcheng Pass is relatively open, and the attacker can still set up a position to attack the pass.

In addition, Guangcheng Pass was abandoned for a period of time before, and now although Zhu Weijun has restarted to build the pass and stationed the army to defend it, it has actually not made this pass more defensive.

On the contrary, the topography of Dagu Pass is more in line with the identity of guarding the eight passes of Luoyang, Dagu Pass is located in the valley between Songshan Mountain and Longmen Mountain, the valley is 15 kilometers deep, the mountains on both sides of the valley are also ravines and ravines, the peaks are sharpened, the environment is very complicated, and it is very suitable for the ambush of troops.

Therefore, the terrain outside Otani Pass made it necessary for the attackers to be careful to guard against the hidden ambushes in the mountains, and the defenders of Otani Pass also had more possibilities for defensive counterattacks.

In this way, the actual situation of Guangcheng Pass and Dagu Pass, the focus of Cao Cao's sneak attack on Luoyang this time is also on the side of Dagu Pass.

When Zhu Weijun attacked Luoyang before, it was mainly because Luoyang's guard general Wu Xi was defenseless, and there were not many troops to garrison the peripheral passes.

Therefore, Wei Yan was able to easily deceive the gate of Dagu Pass, thus attacking the dangerous south gate of Luoyang City, but now Zhu Wei would not ignore the defense of Dagu Pass, otherwise Zhu Wei would not have sent troops to garrison here.

According to Cao Cao's plan, if Cao Ren, Xu Huang, and Xu Shang pretended to be Zhu Wei to support Luoyang's reinforcements and could successfully deceive Zhu Weijun at Guangcheng Pass, then it would be better to pass Guangcheng Pass first and not do it, and then directly deceive Dagu Pass.

In this way, it may be possible to avoid the Guangcheng Pass from launching a warning signal, so that Dagu Pass can be prepared, so that Cao's army can attack Dagu Pass more easily.

As for the Guangcheng Pass, it is completely possible to break through the Dagu Pass after Cao Ren and them, and then turn around to cooperate with Cao Cao's main army, and attack the inside and outside, maybe the Guangcheng Pass can be broken without attacking at that time.

Of course, Cao Cao also knew that everything could not be as it should be, so he also prepared for the worst.

If Cao Ren is recognized in Guangcheng Pass, then he can only use the fastest speed to attack and break through the pass, so that Guangcheng Pass is easier to fight, but Dagu Pass can only be attacked with troops.

But this time, Cao Cao was also ready to forcibly break through Dagu Pass no matter how many people were sacrificed.

Before, the Tiger Prison Pass was because the defenders of Zhu Weijun and Cao Cao's side had about the same strength, so Cao Cao did not dare to fight hard, because hard work may not be able to win the Tiger Prison Pass.

And now although the terrain of Dagu Pass is treacherous, the scale of the pass cannot be compared with Tiger Prison Pass after all, and if Cao Jun tries his best to attack, it can still be captured.

The most important thing is that the Zhu Wei defenders on the side of Dagu Pass are not very strong, and it was a surprise attack by the Cao army, so the success rate of the capture was very large.

So in the early morning of mid-August 199 AD, the soldiers of Zhu Wei on Guangcheng Pass found that there was a large army in front of them under the banner and marching quickly to their side.

Not long after, the soldiers on duty reported to Sun Jing, the general guarding the pass, and Sun Jing also arrived at the gate tower of the pass as soon as possible.

Seeing the rapidly approaching army outside, Sun Jing's eyebrows couldn't help frowning slightly, and then he ordered the soldiers below to prepare for defense, so as not to encounter a surprise attack from the enemy.

Now there are 5,000 Zhu guards stationed in this Guangcheng Pass, and the troops to guard such a pass can be regarded as sufficient.

Of course, it is already summer, so it is normal for the army to march in the morning and evening and rest at noon, although it is early in the morning, the weather is relatively cool, and it is also a suitable time for marching.

At this time, those who came to Guangchengguan were not necessarily enemy troops, but were likely to be reinforcements from Jingzhou.

As the sun slowly rose from the east, the sun shone obliquely on the approaching army, and the uniforms of those generals seemed to be their own army.

Sun Jing looked at the banner of the army from there from a distance, and the word "Yang" was written on it, and then saw that the size of the army was more than 10,000, and there was no logistics in the rear.

Not long after, the army over there had already arrived in front of Guangcheng Pass, and one of the young generals in his thirties came to the front of the gate, politely arched his hand upward, and said, "I don't know which general is in the city, in Xia Yang Ren, it is Hanzhong Zhang Shijun who led the troops to sacrifice wine, and today he was ordered to lead the troops to help Luoyang!" Please open the gate and let us pass!" ”

"Hanzhong Zhang Shijun's army?"

Sun Jing seemed to be a little unclear at first, but gradually seemed to understand something, and then spoke again, "It turned out to be the army of Hanzhong?" But why are you only waiting for these soldiers and horses, hey, no, isn't it Jiang Jiaoying who sent you to Luoyang by water? How did you come to Guangchengguan? ”

"I don't know about this! Or there are too many soldiers and horses, and the water transportation is insufficient, so let a certain institute lead the Hanzhong army and rush to Luoyang by land! Please let the general go quickly! A certain family must arrive in Luoyang before August 19, today is 17, only two days, the weather is hot, although a family is day and night, after all, there is some inconvenience, I am afraid that the journey will be delayed! ”

The young general under the city didn't explain much, and looked anxious, obviously he was also in a hurry to get to Luoyang within the time limit.

"Oh, I see, but you need a command to clear the customs, and please take out the order charm for Yang Saijiu!"

Sun Jing on the city seemed to understand the mood of these Hanzhong troops in the city, but he still asked the other party to come up with the order according to the rules.

"Warrants? I didn't say I needed this! Alas, we hurried from Hanzhong to Jingzhou, and after stopping in Jingzhou for less than a day, we were ordered to march to Luoyang. ”

"Then, what should I do, do you want to stop here with some troops now, and then send someone back to get the warrant? This, but the weather is hot, although our army has carried dry food, but it has not been able to prepare much, this... How should this be? If you miss the military period, alas, at that time, I don't know how to explain to Zhang Da Sacrificial Wine! ”

The young general under the city seemed to suddenly realize, and then his expression became embarrassed, and he seemed to wipe the sweat from his forehead below, and only after a while did he raise his head and say......