Zhang Liao inspected the empty Chang'an City.
Currently, there were only five brigades of tiger warriors and two thousand garrison troops stationed in the city.
Another five thousand garrison troops have been transferred to Lantian County, which is at the horns of Chang'an City.
Another purpose of hoarding heavy troops in Lantian is to protect Danshui and the transportation line from Luo to Lantian.
The outer fortresses originally used to besiege Chang'an have been transformed to be suitable for defending Chang'an.
Elite soldiers were stationed in each fort, and there were tunnels connected to Chang'an and other forts.
If the enemy wants to completely encircle Chang'an, he must either attack and knock down these fortresses one by one; or he can send hundreds of thousands of troops to surround Chang'an in the outer areas; Rangers intercepted those entering and leaving the city.
But Liang Xing was not qualified to do these three things.
He gathered all the warlords in Guanzhong and marched towards Chang'an with more than 50,000 troops.
When they were approaching Chang'an, they received intelligence from the scouts that Chang'an had fallen.
Liang Xing knew that with his 50,000 troops, he could not capture Chang'an where elite troops were stationed.
Moreover, the opponent has built a fortress outside the city, so it is impossible to trap the opponent in the city.
He had no choice but to set up camp ten miles north of Chang'an, build a barrier, and confront Zhang Liao of Chang'an.
Just when he was at his wits' end, Zhong Yao returned from the west with two thousand Xiliang cavalry.
Just like a person only realizes how delicious the steamed bun is after being hungry for a few days, at this time Liang Xing felt how important it was to have a strategic literati.
As soon as he saw Zhong Yao's face, he led a dozen Guanzhong warlords to worship Zhong Yao as the commander-in-chief of the coalition forces.
Zhong Yao naturally did his part.
"Sili, do you think we should go out to fight and how we should capture Chang'an?"
Liang Xing hurriedly asked Zhong Yao.
"We are not in a hurry to attack Chang'an.
Instead, we should first send two partial divisions, one with 5,000 men to arrive at Tongguan, and the other with 10,000 men to bypass Chang'an and attack Lantian to the south.
Our main force is here to keep an eye on Chang'an.
Lu Bu's army in the city."
Zhong Yao clearly stated his strategy.
At this time, he had already learned about the fall of Tongguan to Zhang Liao.
"Can five thousand men defeat Tongguan?
It's not easy to supply supplies to our two partial divisions.
The battle lines are stretched too far."
Liang Xing had a suspicious expression on his face.
"It's not just these five thousand people who went to attack Tongguan.
The real person who attacked Tongguan was Prime Minister Cao.
If Tongguan is captured, do the troops attacking Lantian still need to worry about supplies?
Can the Prime Minister not provide them with supplies?"
Zhong Yao's face A sly smile appeared on his face.
Although he had lost contact with Cao Cao in Guandong due to the isolation of roads, he believed that Cao Cao would capture Tongguan at all costs.
For Cao Cao, Tongguan was too important.
In fact, when Cao Cao just received the news that Tongguan had been lost, he was furious and almost killed Cao Ren in a fit of rage.
Everyone tried hard to persuade him to leave Cao Ren's head.
He roared and said to Guo Jia, Cheng Yu, Xun Yu and other counselors: "I have deployed five thousand of the most elite troops in Tongguan.
This Tongguan is a place where one man can guard the pass and ten thousand people cannot open it, let alone five thousand people." , even if there are only 500 people stationed, the opponent does not have a large number of siege equipment, and it is impossible to break through Tongguan without digging earth and walls for a long time.
How can we let others capture it in just half a day?"
Even though counselors like Guo Jia and Cheng Yu were knowledgeable and far-sighted, they couldn't think of the reason even if they tried hard to think of it.
After hearing what Cao Cao said, everyone shook their heads and said nothing.
Finally, Guo Jia stepped forward and said: "As for why the enemy was able to capture the pass so quickly, I should have an answer after I ask General Cao Ren in detail.
The top priority is that we must retake Tongguan.
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Tongguan is too important to us.
Without it, it will be difficult for our army to enter the pass in the future.
More importantly, Lu Bu can come out from the east at any time and stab our flank. " Cao Cao responded: "This is natural.
I will send Xiahou Dun and Xu Zhu to lead 20,000 troops to recapture Tongguan.
According to Fengxiao, these 20,000 soldiers are enough, which accounts for one-fifth of our Yannan and Henan provinces.
The troops are strong.”
Guo Jiali thought for a while and said: "My lord, this Tongguan is a pass that only one man can guard.
Ten thousand men cannot open it.
There is no essential difference between attacking with 10,000 people or with 20,000 men.
I think it is better to use only 20,000 men to attack it."
Fifteen thousand Go to Wancheng and cut off Shang Yudao.
Without Shang Yudao, Lu Bu would have great difficulty in delivering supplies and supplies to the Guanzhong battlefield.
It was predicted that he would collapse without a fight, and his subordinates concluded that Zhong Yao would definitely attack on the west side of Tongguan.
Guancheng.”
Cao Cao stroked his beard and said: "This plan is very clever.
I also took advantage of the situation to regain Nanyang.
I will always bear in mind the hatred of Nanyang that day."
However, both Guo Jia and Cao Cao made a mistake here.
Lu Bu's supplies did not rely on the entire Shangyu Road, but on the Danshui Waterway and the Shangluo portion of Shangyu Road.
Today, Tongguan has been attacked by armies from the east and west.
Naturally, the city of Tongguan has been cut off from supplies.
Fortunately, the pass has already stocked up enough food and grass for the three thousand elite defenders for two months, and has also prepared enough arrows, rolling logs and stones, kerosene and other supplies to defend the city.
After Xu Chu from the East Road arrived, he did not attack Tongguan immediately.
Instead, according to Guo Jia's strategy, he recruited Hongnong's craftsmen to build siege equipment day and night.
Yang Qiu, sent by Zhong Yao from the West Road, built some simple ladders to climb the city and began to attack Tongguan.
In response to Yang Qiu's attack, Cheng Lian ordered not to use arrows and kerosene, and only used rolling wood and stone.
The Guanzhong soldiers who were attacked by ants were hit by big rocks and hardwood, and their heads were badly bruised.
Some soldiers, as soon as they reached the top of the city that was five or six battles high, were immediately stabbed off the city wall by the opposing soldiers with spears and spears.
Because the city wall was too high and the defenders were all covered in armor, the arrows fired by Yang Qiu's crossbowmen had almost no effect on the defenders.
In this case, some defenders leaned out and used crowbars to kill the defenders.
A simple ladder can be pried over directly.
The soldiers on the ladder screamed and fell into pieces.
After many days, Yang Qiu's soldiers suffered heavy casualties and their morale deteriorated.
He had no choice but to suspend the siege and wait and see what happened.
To the east, Xu Zhu's siege equipment has finally been completed, including trebuchets, tower carts, and door hammers.
It's just that these are relatively primitive and simple tools.
The trebuchet is still a simple lever device that is launched completely by human power.
A trebuchet requires fifty people to operate to throw a fifteen or six kilogram boulder a certain distance.
The door hammer is still a simple matter of hanging a huge piece of wood on a bracket, and then installing wheels on the bracket.
With the rumbling drums, Xu Chu launched an attack on Tongguan.
Twenty large catapults, operated by a thousand people, began to throw stone bombs at Tongguan.
Everyone suddenly shouted slogans.
Under the command of the school officer, fifty people in each vehicle exerted force at the same time in order.
The traction rope at one end of the lever's forearm was pulled down together, driving the lever's big arm to rotate rapidly, and the boulder placed in the magazine was thrown fiercely toward Tongguan: