What kind of careful thoughts Yuan Tan conceived is also a matter of later words, anyway, after Zhu Weijun launched the Northern Expedition, Yuan Tan's thoughts were naturally utopian.

Now it is only said that Yuan Shang temporarily replaced Yuan Shao as the nominal controller of Yuan Jun with the support of Feng Ji and Trial, this Yuan Shang is now in his thirties, and he is not completely incapable, it can be said that he is more decisive than Yuan Shao in terms of character.

Therefore, after he took over the power of Yuan's army, on the one hand, he continued to step up defense matters on the side of Yecheng, and on the other hand, he also put forward his strategic intentions.

Yuan Shang felt that defending Yecheng and putting the battlefield in Yecheng would damage the foundation of his side after all, so he meant that while the main force of Zhu Wei's army was still on the side of Puyang City, Yuan Jun should take the initiative to attack.

In the end, the Yuan army should be on the Liyang side to meet the possible attack of Zhu Wei's army, so that the battle can be placed on the border of Yizhou.

Defending the enemy from the outside is from the Warring States Mencius's "Ten Thousand Chapters", which roughly refers to the enemy's defense before entering the territory and not letting the enemy in, so as to minimize the damage of the war to one's own side.

Now the interior of Yizhou has been damaged by Zhu Weijun, and only the surrounding area of Yecheng is still stable, of course, Yecheng, as Yuan Shao's base camp, is naturally the best developed area in Yizhou.

Therefore, even if Zhu Weijun entered Yizhou to harass and destroy, as long as Yecheng's side was stable, Yuan Shao could at least maintain a rear base sufficient to support the army.

If Zhu Weijun launched an expedition against Yuan Shao, and the two sides placed the battlefield in Yecheng, it would naturally destroy the farming and autumn planting around Yecheng, and completely destroy Yuan Shao's rear grain and grass foundation.

The best way to do this is not to put the battlefield in Yecheng.

In this way, after Yuan Shang took over the power, he was ready to place the future battlefield with Zhu Weijun in Liyang, the border between Yizhou and Yanzhou.

As long as the base camp base of Yecheng in the rear can remain stable, the stability of farming can be maintained, and the grain and grass needs of the Yuan army can be met through farming, even if Yuan Shang and Zhu Weijun fought fiercely on the Liyang side, and the two armies confronted each other for a long time, they could also use the rear base camp on the Yecheng side to support Yuan Shang's war in Liyang in the front.

In fact, Zhu Wei captured Luoyang before, and put the battlefield facing Cao Cao and Yuan Shao in Luoyang, which also had this meaning, all in order to maintain the stability of the rear base camp, so as not to affect agricultural and grain production, thereby destroying his own long-term development.

Therefore, it is also very reasonable for Yuan Shang to put forward such a strategic concept at this stage of time.

It's just that now Zhu Weijun's Pang Yan's Xionglu camp occupies the land of Chaoge, Dangyin, and Liyang, so according to Yuan Shang's meaning, he should first call in a large army to attack Zhu Weijun's Pang Yan's department, and then build a defense line in Liyang County to start a head-on duel with Zhu Weijun.

Now that Yuan Shang is in charge of the overall situation instead of Yuan Shao, his will is naturally the core of Yuan Shaojun's strategy.

In the end, Yuan Shang decided on the next strategic plan, he left Xu Yu to supervise the army of 20,000 to continue to garrison Yecheng, to ensure the safety of Yuan Shao, who stayed in Yecheng to recuperate, and then Yuan Shang personally took Feng Ji and trial, led nearly 100,000 troops to Dangyin first, and launched an offensive against Zhu Wei's Pang Yan Division.

Speaking of Yuan Shaojun's sudden counterattack, it really surprised Pang Yan and Zhuge Liang, who were stationed on the front line of Chaoge, Dangyin, and Liyang.

After all, they were ordered to defend Yuan Shao's army to the south before, but they adopted an offensive defense strategy of sending troops to attack Yecheng, while Yuan Shaojun's side basically adopted a passive defense strategy before, and there was no intention of counterattacking at all.

But now that Yuan Shang has made a decision, with the support of Feng Ji and the trial, Yuan Shaojun quickly made an attack.

So Yuan Jun's first target was the location of Dangyin County, which was the closest to Yecheng, which was located in the North China Plain, and although there were rivers flowing in the south of the county, it was only a small county on the whole, easy to attack and difficult to defend.

And Pang Yan only sent Ling Cao and Lei Bo to lead nearly 10,000 troops to garrison in Dangyin County, and as a result, Yuan Shaojun's forward number was nearly 30,000, and he directly rushed to Dangyin County.

Ling Cao and Lei Bo were worried that the army would be surrounded in the small Dangyin County, so they did not defend the county seat of Dangyin and took the initiative to lead the army out of the city to engage in battle.

As a result, because of the huge disparity in the strength of the troops, Zhu Weijun responded to the battle in a hurry, so after Ling Cao and Lei Bo lost no less than 3,000 troops, they took the initiative to withdraw their troops from Dangyin County.

Then Yuan Shang arrived with the main force of the rear army, on the one hand, he divided his troops to attack Liyang County, and on the other hand, he also approached in the direction of Chaoge with the main army.

In the face of Yuan Shaojun's strong attack, Pang Yan and Zhuge Liang discussed, and could only withdraw the troops of Zhou Tai and Jiang Qin stationed in Liyang County, and then the whole army assembled in Chaoge to prepare to meet the attacking Yuan army.

Compared with the more than 100,000 troops of the Yuan army attacking this time, the troops on Pang Yan's side are still a little insufficient after all, so if the troops are scattered and stationed everywhere, it will only allow Yuan Shaojun to easily eliminate the garrisons everywhere.

In this way, the scattered forces can be gathered in order to clench their fists and fight against Yuan Shaojun.

At the same time, Pang Yan and Zhuge Liang had thought of the possibility of Yuan Shaojun going south, so they had already built camps and dug ditches on Chaoge's side, forming a relatively rigorous defensive line.

If Yuan Shaojun really forcibly attacked Chaoge, Pang Yan, who had gathered all the troops of the Xionglu battalion, could also use the fortifications to fight a hard-fought battle with tens of thousands of Yuan Shaojun in Chaoge.

At this time, Pang Yan and Zhuge Liang didn't know Yuan Shang's true intentions, and only thought that Yuan Jun might have received the news from Puyang, so they wanted to take advantage of the situation to attack Luoyang, so they naturally continued the strategic task of blocking Yuan's army from moving south.

It's just that after Yuan Jun easily took over Liyang from Zhu Weijun, he first sent an army to garrison Liyang, and then requisitioned a lot of civilian servants to Liyang to build defenses, which showed that Yuan's army was ready to meet Zhu Wei's army in Liyang.

This Liyang is located at the junction between Wei County of Yizhou and East County of Yanzhou, and is close to the Yellow River in the south, which can be regarded as the advantage of controlling the natural risks of the Yellow River.

In this way, after Yuan Shang's garrison was in Liyang, he could not only use the Yellow River to defend against Zhu Wei's Northern Expedition offensive, but also cross the Yellow River at any time to threaten Puyang City and even various counties in Yanzhou.

This forced Zhu Weijun to solve the enemy of Liyang first when he was in the northern expedition to Yuan Shao, otherwise if Liyang Yuan's army crossed the river and entered Yanzhou, the Yanzhou that had just been captured before would be lost and regained.

I have to say that Yuan Shang chose Liyang as the place of the decisive battle with Zhu Weijun, and he can be regarded as finding an acupuncture point where Zhu Weijun had to fight......