The siege of Jingzhou was quickly resolved due to Jiang Sheng's intervention, and Huang Zu also relieved his suspicions with Liu Cong because of his assistance.

Liu Cong knew that Jingzhou was weak now, so he entrusted Huang Zu with an important task and took the opportunity to incorporate Huang Zu's soldiers and horses.

Jiang Sheng's reinforcements were encamped on the outskirts of Xiangyang, and they had no intention of leaving, so Liu Cong had no choice but to ask Huang Zhong to allocate grain and grass for Jiang Sheng's garrison.

The news of Liu Bei's trip to Shangyong reached Chengdu, Liu Zhang was very happy, he knew that Liu Bei and Jiang Sheng were enemies, and the enemy of the enemy was a friend, although Liu Zhang's IQ was almost there, but he still understood this truth.

There are all kinds of signs that Ma Chao under Jiang Sheng is ready to move, and he has hidden plans to go south.

Guanghan, Ba County, and Hanzhong in the north of Yizhou are all under the threat of Ma Chao, especially Hanzhong County, which borders Jiang Sheng's sphere of influence on three sides, although there is no sign of attack by the Chang'an Captain's Department, but after all, the border with Chang'an is too long, and Jiang Sheng will have to take it sooner or later.

When Liu Zhang was in a panic, Liu Bei advanced to the mediocrity, which was good news for him.

Shangyong is a big city in Hanzhong, and Liu Bei also has tens of thousands of horses, so with such a combination, it is not so easy for Ma Chao to attack Hanzhong.

When Liu Beijun was still more than 500 miles away from Shangyong, Liu Zhang planned to send a messenger to meet him.

This move was strongly opposed by Huang Quan, Zhang Ren and other Yizhou civil and military forces, and welcoming Liu Bei into Shu was simply to lure the wolf into the house.

Fa Zheng's opposition is particularly fierce, Fa Zheng's father Fa Yan was originally the court lieutenant of the court, after Jiang Sheng's new official system was implemented, he was reappointed as the minister of the Ministry of Justice, Jiang Sheng is still reusing him, and Fa Zheng went to Liu Zhang's post here or Jiang Sheng arranged it.

If Yizhou takes in Jiang Sheng's enemy, what do you think will happen?

Liu Zhang, who is usually indecisive, rarely has decisive behavior, and finally decided to accept Liu Bei, but was opposed by his ministers.

Liu Zhang said: "Ma Chao under Jiang Sheng is about to enter the Hanzhong, who can resist it?" Zhang Lu? ”

Everyone was silent, Zhang Lu was okay with politics, and it was impossible for him to organize a war.

Now that Liu Bei has entered Hanzhong, he is the new force to resist Ma Chao.

Speaking of which, except for Fazheng, everyone no longer objected, so Liu Zhang sent Zhang Song as an envoy to welcome Liu Bei into Hanzhong.

Fa Zheng clearly knew that Jiang Sheng was going to enter Yizhou, and he didn't want Yizhou to have more forces against Jiang Sheng, but it was difficult to speak alone, and Liu Bei still accepted it.

The news of Fa Zheng quickly spread to Jiang Sheng's western base, and Ma Chao said with a smile: "King Jin is worried that he can't find Liu Bei's main force, and now he actually sent it to the door." ”

After Liu Bei settled in Shangyong, Ma Chao also launched an attack on Hanzhong.

The thing called "tank" researched by Jiang Sheng's Academy of Military Sciences happened to be used for testing.

This tank was a sketch drawn by Jiang Sheng, but it was discovered by Ma Jun of the Academy of Military Sciences, who was an inventor and felt very valuable when he saw Jiang Sheng's drawing.

Ma Jun came to the combat readiness area to accept Jiang Sheng's guidance, because most of the new weapons used in Jiang Sheng's army were directly proposed by Jiang Sheng.

Jiang Sheng's original intention was to study the tank powered by the steam engine, but the steam engine was huge and consumed a lot of coal, which was very inappropriate for mobile combat, so Jiang Sheng threw the sketch away.

After Ma Jun found out, he mentioned: "Lord Wang, can you allow me to modify this?" ”

"Oh? How do I change it? ”

"The reason why the prince thinks it is inappropriate is nothing more than the problem of power, can we try to replace the steam engine with a war horse?"

Jiang Sheng's eyes lit up, he was influenced by later generations, and he only considered mechanization.

So the "tank" was invented: the power area in the middle was changed to four war horses, the back seat was the groom, the front left a grid window for the groom to observe the situation ahead, the rest of the place was covered with iron sheets, the original track on both sides of the place was changed to the troop transport compartment, and the bottom of the troop transport compartment was equipped with wheels, so that the war horse could save a lot of effort, and the top was equipped with four groups of fire dragon arrow launch compartments.

This thing appeared on the battlefield in the late Eastern Han Dynasty, it was simply a steel monster, with the tracks removed, the weight was much lighter, and the speed of maneuvering was also improved, but it still took a lot of time to transport it from Luoyang to Wudu.

The fire dragon arrow launch compartment has been mass-produced, and a lot of it has been shipped over.

Zhang Lu was reluctant to accept Liu Zhang's leadership, but at the moment of the great enemy, he had no choice but to agree to be under Liu Zhang's command.

Ma Chao's Northwest Army was already able to fight well, although it was defeated and defeated in the face of Jiang Sheng, it should not be too difficult to deal with other troops.

Sure enough, after Ma Chao led the army into Hanzhong, he was invincible, and the defenders of Anyang fled without a fight.

Zhang Lu personally came to Weiyang to supervise the battle, and when he saw the Ma Chao Iron Cavalry swarming outside the city, he was already timid, so he took advantage of the fact that the Ma Chao army had not arrived, gathered the soldiers and horses and quickly retreated to Nanzheng.

The seat of Hanzhong is Nanzheng, and the safety of Nanzheng is very important, so the main force of Hanzhong is concentrated in Nanzheng.

Ma Chao stopped after taking Weiyang, there was no movement for a month, Zhang Lu breathed a sigh of relief, and hurriedly sent someone to send a message to Liu Bei, Shangyong is located in the west of Jingzhou, Jiang Sheng can't directly fight Shangyong after withdrawing from Nanyang, and the top priority is to resist Ma Chao's 100,000 army.

Liu Zhang's initiative did not win Liu Bei's strong support, and after Zhang Lu's letter arrived, Liu Bei ignored it at all, recruiting troops and horses in Shangyong to raise supplies.

Zhang Lu observed for many days, and he had already relaxed his vigilance, and Ma Chao's banner appeared in the distance.

The war drums in Nanzheng City beat up, and countless soldiers landed in the city, looking at the enemy army that was getting closer and closer.

After arriving at the place of ten miles from Nanzheng City, Ma Chao's cavalry suddenly scattered on both sides, and the middle was empty.

Zhang Luzheng was puzzled, but saw a dense "iron-armored monster" appearing in the back, moving fast, but there was no one or a horse in sight.

After the siege began, dense stones flew out from behind the ironclad monster, and this time the catapult was no longer a catapult, but a thunderbolt, which could be fired in bursts.

In the middle is a big flywheel, and the two people next to him turn the handlebar, and after the big flywheel rotates, twenty rounds in a row, shot out instantly, and reload in a back and forth cycle.

This time it was an eye-opener for Zhang Lu and them, and the rainstorm-like stone bullet attack turned Nanzheng Chengtou into a mess.

The houses in the city were also damaged to varying degrees, and the people in the city also suffered many casualties.

Immediately after, the sound of breaking the sky came again, and this time it was clear that bundles of iron arrows were whistling with long tail smoke.

The arrows could shoot into the city wall until they were gone, and the soldiers who were shot flew straight upside down, and some were nailed directly to the walls of the houses in the city.

The defender Yan Pu saw that these iron-armored monsters were long-range weapons, and the crossbow arrows shot by the defenders could not penetrate it at all, while it could fire long-range crossbow arrows.

The only way to break these iron-armored monsters is to increase their fire attack in close combat, and if they are all surrounded, the iron-armored monsters will not be able to play a role.

Zhang Lu was a little worried that he would be taken care of by Ma Chao after leaving the city.

Yan Pu decided to give it a try, and sent 20,000 cavalry to sweep the formation, while the infantry went to deal with the ironclad monsters.