As far as the military geographical location of Yan is concerned, Hu Di in the north, Tian Qi in the east, and Qiang Zhao in the west, was once weak, "the east is not as good as Qi, and the west is not as good as Zhao". However, after the painstaking management of King Yan Zhao, Su Qin, Le Yi and others, Donghu was broken in the north, the Great Wall was built, and the five counties were placed, which basically solved the problem of Hu Di disturbing the border; The east defeated Qi again, although the success fell short, but the Qi country, which was greatly injured, could not pose a threat to Yan for a while; Only the Zhao State in the west, after the "Hufu Cavalry Shooting" of King Zhao Wuling, its power increased greatly, and the southern and northern wars were greatly enhanced, and the national strength was greatly boosted. In the face of such an "international situation," the wise and wise decision-makers of the Yan State should have sought to reconcile with Zhao and establish friendly and good-neighborly relations. The Yan Kingdom after King Yan Zhao was almost a river in decline. And the mistake of the mistake is probably nothing more than provoking the western neighbor Zhao and launching the Yan-Zhao War, so that the two countries will overlap and end up losing both. "The snipe and the clam compete, and the fisherman profits", and in the end, it was the Qi State (Xiaoli) in the east and the Qin State (Dali) in the west that finally got the "fisherman's profit".

In the Battle of Changping, Zhao was defeated, Zhao Kuo died on the battlefield, Zhao lost more than 400,000 elite soldiers, and Zhao was greatly injured.

And at this time, Yan Guo continued to fall into the well and constantly provoked Zhao Guo, but in the end, it did not end well, losing troops and losing generals such as chestnut belly and drama Xin.

In 265 B.C., the feudal monarch of the Yan State, Gaoyang Jun Rong (Song people), led an army to attack Zhao. King Zhao Xiaocheng hired the Qi man Anping Jun Tiandan as a general at the cost of ceding the three cities of Jidong Linglu, Gaotang and Pingyuan Ling to Qi, and he led the army to fight back against the Yan people. Tian Dan fought back this time and pulled out Yan Zhongyang (now west of Tang County, Hebei) in one fell swoop.

In 259 BC, before the end of Zhao's defense of Handan against Qin, Zhao Wuyuan ordered Fu Bao, Wang Rong, and Su Shu to lead the people of the original Yan State to rebel against Yan. This move is tantamount to falling into a well, and you will not be saved when you die.

In 256 B.C., the Yan State may have wanted to take advantage of the fire to loot, and sent troops to attack the Changcheng of the Zhao State (now the northwest of Jizhou District, Hebei), and pulled it out in May ("Historical Records of the Zhao Family"). Changcheng is hundreds of miles away from Yanxia, and it has gone deep into the hinterland of Zhao and approached the Dune Palace.

In 251 B.C., Yan Xiang chestnut belly to Zhao Youhuan, with 500 gold for Zhao Xiaocheng King toast. Chestnut heard and witnessed the "withering" scene after the battle of Changping in Zhao State, and thought that there was an opportunity, and reported to King Yan after returning to China: "King Zhao is strong and all die in Changping, and his loneliness is strong, and he can be fell." King Yan summoned the king of Chang Guo Le Xian, and Le Xian persuaded King Yan not to enter the Zhao country, "The country of Zhao Si Zhan, its people practice soldiers, and they cannot be killed." King Yan said, "I will cut down one with five." "Le Xian still thinks that Zhao is unbreakable. King Yan was furious and insisted on killing Zhao; And the ministers also think that Zhao Keva. However, the doctor still admonished the ditch loyally, first cleared the customs with the people of 500 gold, and then raised troops to attack, which is a bad omen, and the army will not be successful; But King Yan didn't listen. In this year, Yan Qi two armies, two thousand cars to attack Zhao, one by the commander of the chestnut belly to attack the north of the province (now north of Baixiang, Hebei), one by the commander of Qing Qin to attack the Dynasty (now the northeast of Wei County, Hebei), the king of Yan also followed by the division. Zhao Guo also immediately raised troops to meet the attack, Lian Po broke the chestnut belly in Shan, Le Cheng broke through the Qing Qin Yudai, and the Yan army was defeated and fled. Lian Po led the army to pursue all the way, and the army of Zhao advanced more than 500 miles until the siege of Yandu. Yan Guo couldn't resist it, so he sent someone to ask for peace. Zhao didn't agree, saying that he had to let the general come to "deal with peace" before he would stop. At this time, Le Xian had already run to the Zhao Kingdom, and the King of Yan took the ditch as a way to deal with each other. In this way, Zhao Jun broke the siege and left.

In 250 B.C., Yan Zhao and Tan collapsed. Zhao generals Lian Po and Le Cheng entered the siege of Yandu again, Yan Feed sued for peace with heavy courtesy, and Zhao Fang broke the siege and left.

In 249 BC, because of the Yan State breaking the treaty, Zhao General Lecheng besieged Yandu again.

In 248 BC, the Yan State was rude, and Zhao sent Lian Po and Yanling Jun to help Wei attack Yan.

In 247 BC, Zhao reconciled with Yan Yitu, but who expected that Yan would break the treaty soon after. Three years later, Li Mu attacked Yan and pulled Wusui (northwest of Xushui District, Baoding City, Hebei Province) and Fangcheng (southwest of Gu'an County, Hebei Province).

In 242 BC, Yan saw that Zhao Shu was trapped in Qin, Lian Po ran to Wei, and Pang Xuan was a general, wanting to take advantage of Zhao's disadvantages to attack him. Yan Wangxi asked Yu Ju Xin, and Ju Xin said: "Pang Xuan is easy to hear." So, King Yan sent drama Xin to attack Zhao. Zhao sent Pang Xuan to fight back, captured and killed Yan General Ju Xin, and took 20,000 Yan divisions.

In just thirty years (265-236 BC), there were as many as nine wars between Yan and Zhao. In the critical late Warring States period, out of "wrong decision-making", the Yan State launched several "wrong wars", which is sad and lamentable! And in the battle with Zhao, Yan Guo lost more than he won (one win and eight defeats), often more than he gained, and wasted national strength, which was pitiful and ridiculous! The rapid decline of the Yan State in the late Warring States period was not unrelated to these several Yan-Zhao wars.

The Zhao army was undoubtedly the most powerful and resilient army at the end of the Warring States period, except for the Qin state. Although they were defeated by the Qin army in the Battle of Changping, their vitality was greatly damaged. However, the new generation of Zhao Army, after experiencing the tempering of the Battle of Handan, although it is not as good as the previous Zhao Army in terms of numbers, it is no less than the previous Zhao Army in terms of spiritual strength. And it is precisely because of such a strong spiritual power that they actually had a brief period of Zhongxing after the Battle of Changping. Not only did they defeat Yan twice, but they also captured Fanyang in Wei under the leadership of Lian Po. Then Meng Wei led an army of 100,000 to attack Zhao, and Pang Xuan of Zhao led an army to resist. In this battle, the Zhao army defeated the Qin army, shot Meng Fu, and killed 30,000 Qin troops.

Although Zhao experienced the Battle of Changping, his vitality was greatly damaged, and the army's combat ability was greatly weakened. But because of generals like Lian Po, Li Mu, and Pang Xuan, Zhao Jun's combat ability has never been weak.

Yan and Zhao fought for many years, and the Qin State was overwhelmed, and successively captured a large area of territory in the Three Jin Dynasty, and set up Shangdang County, Taiyuan County and Dong County.

In 236 BC, that is, in the eleventh year of the reign of King Qin, Zhao Yan, the king of Zhao, sent Pang Xuan to attack Yan and seize Chongcheng, Yangcheng and other places in Yan. Before the war ended, Qin sent Qin generals Wang Qian, Huan Qi, and Yang Duanhe to take the opportunity to lead an army to attack Zhao in the name of saving Yan.

The main hall of Xianyang Palace of Qin State.

"War broke out between the kingdoms of Yan and Zhao, and the two countries were at war fiercely. The widow decided to divide the army into three routes, leaving Zhao Guo exhausted and having nothing to do. King Yingzheng of Qin said happily.

"The snipe and the clam compete, and the fisherman wins. Yan and Zhao also have far-sighted ministers, but it's a pity that Yan Wang Ji Xi and Zhao Wang Zhao Yan are simply short-sighted and stingy, and they have been pinching each other, so we can only let Daqin enjoy the benefits of fishermen. Meng Yi couldn't help but sigh.

"The Snipe and the Clam Fight" is a fable told by Su Dai when he lobbied King Zhao Hui. At that time, King Zhao wanted to attack Yan Kingdom, and Su Dai went to persuade King Zhao Hui for Yan Kingdom: "When I came this time, I passed by Yishui and saw a river mussel basking in the sun with its shell open. There was a sandpiper that stretched out its beak to peck at the flesh of a mussel. The mussel quickly closed its shell and clamped the sandpiper bird's beak tightly. The sandpiper said, 'If it doesn't rain today, if it doesn't rain tomorrow, you'll die.'" The mussel also said to the sandpiper, 'If you don't let go today, you won't let go tomorrow and you will die!' Neither of them would let go. When the fisherman saw this, he caught them both. Now Zhao is going to attack Yan State, Yan and Zhao can't hold each other, and after a long time, the strength of both sides is very depleted. I fear that the mighty Qin State will become a "fisherman" in the competition between the snipe and the clam in the competition. So I hope the king thinks about it carefully. When King Hui heard this, he suddenly realized and said, "It makes sense! Then he stopped attacking Yan.

The army was divided into three routes, and the army on the north road was led by the Qin general Wang Jian to lead an army of 100,000 to attack the strategic place of Taihang Mountain, and threaten Handan, the capital of Zhao State, from the west. The middle route army was led by the Qin general Yang Ruihe to attack the northern important town of Hanyang, threatening the capital of Zhao from the northwest, and alerting the reinforcements in the northern part of Zhao. The army of 150,000 led by the Qin general Huan Qi set out from Nanyang to attack Anyang, to which Yeyi belonged of Zhao, and threatened Handan, the capital of Zhao, from the south. "King Yingzheng of Qin has obviously discussed it with the national captain Wei Yu a long time ago, so he is calm and unhurried, showing the domineering spirit of the emperor.

"Great King, in addition, we should send someone to secretly form an alliance with the Yan State, so that the Yan State can also counterattack the Zhao State from the east." Meng Yi made a suggestion.

"Okay, in this way, surrounded on all sides, presumably Zhao Guo will not be able to return to the sky this time." No one wants to destroy Zhao State, invade Handan, and wash away the shame of childhood more than King Yingzheng of Qin.

"Great King, there are still 150,000 elite soldiers on the northern border of Zhao State, commanded by the famous general Li Mu. If the king of Zhao is willing to abandon the desolate land in the north, then even if the Zhao State is besieged on all sides, it still has the strength to fight. Qin State General Wang Jian Lao Cheng reminded solemnly.

"A thousand soldiers are easy to get, but one will be hard to find. Great King, General Wang's worries are very reasonable. "Meng Yi, as a traverser, naturally knows the power of the famous general Li Mu.

"Hmph, my Great Qin soldiers are in full swing, and a little Li Mu will lead his troops to fight again, and he will not be able to reverse the decline of Zhao State." King Yingzheng of Qin was empty-eyed at the moment, thinking that with the strength of Great Qin's strong troops and crossbows, he could crush all enemies.

"To underestimate your enemies is to underestimate yourself." Meng Yi suddenly remembered the story of the tortoise and rabbit race: one day, the rabbit and the tortoise were running, and the rabbit laughed at the tortoise for climbing slowly, and the tortoise said that one day he would win. The rabbit said, let's start the game now. The rabbit ran as fast as the rabbit ran, and the tortoise crawled as hard as he could, and in a few moments the rabbit and the tortoise were already at a great distance. The rabbit thinks that the game is too easy, and that it needs to sleep for a while, and self-righteously says that even if he wakes up the tortoise, he may not be able to catch up with it. As for the tortoise, it crawls all the time, and when the rabbit wakes up, the tortoise has reached the end. This story tells you that you should not underestimate others. Humility makes people progress, pride makes people backward. You have to do things in a down-to-earth manner and don't give up halfway, so that you can achieve success. This is not just a story, according to the results of a later generation of biologists. It is said that in the tortoise and hare race, if measured by the amount of exercise they have exercised in their lifetime, the tortoise, as a very endurance animal, will definitely win. According to scientists, tortoises travel more kilometers in their lifetime than rabbits.

"In the age of cold weapons, anything is possible. A famous general can often save the edifice that is about to collapse by himself! Meng Yi was worried, but at this moment, King Yingzheng of Qin couldn't listen to any advice!