In the Battle of Changping, the Qin army Sima Terrier attacked the Great Wall of Baili in the north, and Wang Ling's department cut off the communication between Daliangshan and the Changping camp. At this time, the Zhao army was besieged, but it had not yet failed, what was the last straw that crushed Zhao Kuo?
The Zhao army lost contact with the grain depots in Daliangshan, and if it wanted to open up the grain route, the Zhao army had to control the Xiaodongcang River Valley. However, although the water in the Xiaodongcang River Valley is not deep, the cliffs on both sides of the river are rocky and rocky, and there is nothing but a few weeds that occasionally emerge.
To transport grain and grass in the small Dongcang River Valley, where there was no hiding place, the Zhao army knew that the guanshan was difficult to cross, and had to break through bravely. Zhao Kuo ordered some of the Zhao troops to break through in the direction of the BailiShi Great Wall and the Dan River respectively to attract the attention of the Qin army, but sent a crack army to the Daliang Mountain to forcibly transport grain and grass.
But the commander of the Qin army was Bai Qi, who could be so good at fooling, Bai Qi anchored the Lack of food for the Zhao Army, and the place where he increased his troops the most was the Xiaodongcang River Valley.
The Zhao army struggled to rush to transport grain, the Qin army desperately blocked, and the two armies launched a fierce battle in the Xiaodongcang River Valley, and the shouts in the river and on the shore were boiling, and the killing sound was tremendous.
In the small Dongcang River Valley, the corpses accumulated in the river channel, the blood flowed into a canal, and a very small number of Zhao Jun's bloody robes and armor only carried a few bags of grain and grass back to the Changping camp.

There were still 300,000 people in the Zhao Army's camp, and there were more than three hundred centurions alone, and this grain was also the rations of the centurions, and even the urgent needs of the Zhao Army could not be solved.
Bai Qi ordered the Qin army to guard the key roads of various mountain passes, build barriers, and trap more than 300,000 Zhao troops in Changping.
Although Bai Qi used soldiers like gods, the Qin army had not yet won at this time, and in terms of casualties, the Qin army was still greater than the Zhao army, but the Qin army began to grasp the initiative of the battlefield.
In the face of the encirclement of the Qin army, Zhao Kuo, who was the first in the world in the art of war, did not choose to break through to the direction of Handan at the first time.
If the Zhao army retreated to Handan with more than 300,000 people, it would be difficult to dispatch, and there would be a lot of losses halfway through, and the breakthrough would not be cost-effective.
Zhao Kuo sent people to Handan for help and grain, and at this time, if Handan sent an army of tens of thousands of people, they could counter-encircle the Qin army together with the Changping army! As long as Handan brought grain, the Zhao army in Changping did not fear the Qin army at all.
To say that zhao guo's reinforcements, only Li Mu's border army, the strength is relatively strong, the number of other armies is insufficient.
At the moment of life and death, Li Mu's defenders in Dai County, Yunzhong, Yanmen and other places were transferred, that is, a matter of ten days. But at that time, Li Mu was not yet famous, and it would take more than ten years before he would break the Xiongnu. If Li Mujun went south, it could change the situation of the Changping War, but the Xiongnu were also likely to take the opportunity to go south.
After weighing it up again and again, King Xiaocheng of Zhao and Jun Pingyuan still did not dare to mobilize Li Mu's border army.
So Zhao Kuo built and strengthened the fortifications to prevent the Qin army from attacking, although the reinforcements were hopeless, as long as handan brought grain and grass, more than 300,000 Zhao troops were enough to negotiate with the Qin army.
There was not much surplus grain left in the Zhao Army's Changping camp, which could only be maintained for a period of time without starvation. At this time, the State of Zhao was also using a diplomatic offensive, and Pingyuan Jun sent people to the States of Wei, Qi, and Chu to borrow grain. However, Changping did not win or lose, and these princes were unwilling to lend grain to the Zhao state. King Xiaocheng of Zhao ordered the collection of grain and grass from all over the Zhao kingdom, and prepared to send charcoal to Zhao Kuo again.
However, at this time, King Zhaoxiang of Qin made an earth-shattering move. He conscripted all the men over the age of fifteen in Hanoi County to the front, and each of them was knighted. It is equivalent to each person to send a set of farmhouses, an acre of land. King Zhaoxiang of Qin was well versed in the way of war, and at this time he had made a bloody decision to share the fruits of future victory with his generals.
Hanoi County, originally part of Korea, was the county where Nowang City was located, and the Qin State had been conquering the territory of Hanoi County in the past few years, but it did not recruit troops in Hanoi County.
Hanoi County is close to Shangdang, and King Qin Zhaoxiang takes local materials from here, which is also forced by time, when time is life.
In the case of Zhao Guo's Handan side, if grain and grass were to be transported, it was first transported from the "4 Sheep Intestines" and "5 Fukou" to the North Shang Dang, and then from the North Shang Dang to the south. However, the Hundred Mile Stone Great Wall between the North and the South Shangdang was already owned by the Qin Army, so the Zhao Army's transportation of grain and grass could only be achieved through the "3 White Mountains" of the State of Wei.
King Zhaoxiang of Qin temporarily formed such an army in order to block the "3 Baixing" of the Wei state and encircle the entire Changping battlefield again, with the purpose of stopping the reinforcements of Handan and cutting off the life-saving food and grass of the Zhao army in Changping.
This Qin army numbered 80,000 to 100,000, and although it had no combat experience, it was not a problem to deal with the grain transport troops of the Zhao State, which were also mainly militiamen. If Zhao Guo recruited teenagers with no combat experience like him, then this Qin army would not be afraid of Zhao Guo's reinforcements. If Zhao Guo transferred elite troops from the north, the number would inevitably be limited, and the qin army's new recruits would build a fortress to defend it, and there would be no major obstacle.
When the war hit here, Zhao Kuo's army was uncomfortable, and there was no food and no reinforcements, but this was not all Zhao Kuo's fault, and the young King Zhao Xiaocheng was indeed inferior to the old and calculating King Zhaoxiang of Qin.
After Zhao Kuo left Handan, King Xiaocheng of Zhao did not ask Zhao Kuo to report to him in great detail, and King Xiaocheng of Zhao knew that he would not be allowed to obey the orders of foreign kings, just as King Huiwen of Zhao trusted Zhao Hao, and the kings of the Zhao family had full trust in the generals.
However, it is regrettable that King Zhao Xiaocheng did not give Zhao Kuo more support, and King Zhao Xiaocheng gave power to Zhao Kuo, which was no problem in a small and medium-sized war, but in a protracted war like the Battle of Changping, it was not enough for the monarch to have trust behind his back, but also had to support it.
In terms of support for the general, King Zhaoxiang of Qin was much older, and he secretly replaced the main general Bai Qi, personally rushed to Hanoi County, which is adjacent to Shangdang County, to supervise the battle, and then recruited fifteen-year-old men from Hanoi to participate in the war, cutting off the zhao army's grain route.
In the Battle of Changping, the last straw that crushed Zhao Kuo and the Zhao army was that the fifteen-year-old man of Qin Zhaoxiang Wang Fa Hanoi participated in the battle and cut off the Zhao army's grain route.