In the Battle of Jining in Datong, Fu Zuoyi, with his absolutely inferior troops, adopted the tactics of encircling Wei and rescuing Zhao, defeated the North China Field Army, which had an absolute advantage, and severely damaged the North China Field Army, forming the initiative strategically, and the national army occupying Chengde formed a flanking attack on Zhangjiakou from the east and west fronts, and the situation in Zhangjiakou was serious.

Zhangjiakou is the only provincial capital city seized by the Chinese Communist Party, called the second red capital, is the capital of the Shanxi-Chahar-Hebei Military Region at that time, the geographical location is very important, the strategic point of North China, Northeast China, Chasui is the throat of the above three places, it is the Pingsui railway hub, the north passes through Outer Mongolia Kulun, the northwest passes through the Soviet Union Uriya Sutai, and the northeast passes the Rehe River, which has extremely important military, economic and political value. The cadres of the Shaanxi-Gansu-Ningbo Border Region went to the northeast, maintained railway communication with the Soviet side, and obtained foreign aid, and Zhangjiakou was also the only way to go. Therefore, it was a battleground between the Kuomintang and the Communist Party, and the national army began to prepare to attack Zhangjiakou after the Battle of Jining.

The Jin-Cha-Ji Military Region headed by Nie Rongzhen had no intention of holding Zhangjiakou after the defeat of the Battle of Jining because its troops were greatly damaged and it was in an unfavorable situation of being attacked by the east and west fronts.

After the end of the Anti-Japanese War, the total strength of Jinchaji was 320,000 people, but after the failure of the Battle of Datong Jining, after the loss of part of the personnel in Datong Jining, there should still be about 200,000 people, and the small troops of more than 20,000 people in the 12th theater of the national army, and 50,000 troops in the 11th theater, the two are combined, but more than 70,000 offensive troops, still have an absolute advantage. The fact that he was going to run without a fight naturally aroused the dissatisfaction of the Military Commission. In judging the focus of the attack, the North China Field Army believed that Fu's strength was small, and the losses in the Battle of Jining were not small, so the focus of the Nationalist Army's offensive must be on the Eastern Front, so deep down, there was still the concept of looking down on the Fu Army.

They estimated that the Western Front was only an auxiliary offensive and misjudged both time and direction. In terms of time, it is believed that only after the Eastern Front Nationalist Army occupies Huailai can the Fu army be dispatched; In terms of direction, it is believed that the Fu army was dispatched along the railway line last time, and this time it must also take the railway, and this route can meet with the national army on the eastern front at Chaigoubao in the shortest distance, and it is impossible to seek the near and far and take the mountain road, so he is convinced.

According to this judgment, that is, the Nationalist Army on the Eastern Front is the main direction of attack, and the offensive line runs along the eastern section of the Pingsui Railway on the Eastern Front to the Kangzhuang and Huailai areas. Therefore, in terms of troop allocation, the main force was placed on the eastern front to prepare for a war of annihilation, and all three brigades of the 1st column, two brigades of the main force of the 2nd column, 7 brigades of the 3rd column, 10 brigades of the 4th column, the 5th independent brigade and a large number of militias were deployed in the Huailai and Yanqing areas of the eastern front.

The 4th Vertical Brigade and the main force of the Jinsui Military Region were deployed on the Chaigoubao, Tianzhen, and Yanggao lines facing the Datong Railway Line. Prepare for the weak Fu army. The Teaching Brigade and the Military Region Guard Regiment are located in Zhangjiakou as mobile units. The troops of the Seventh Army Subdivision of the Shanxi-Chahar-Hebei Military Region were located in Zhangbei to take up the guard duty, and six other brigades were sent deep behind the enemy lines on the Eastern Front to attack the attacking enemy on the Eastern Front from the flank.

Such an armament, from the point of view of general military common sense, should be impeccable. But the problem is that in the face of Fu Zuoyi, who is extraordinary in both strategy and tactics, this strategic arrangement is a bit of a deviation. With 20,000 weak troops, attacking a strong enemy prepared to block the attack, the result is often the head is broken blood, the loss of troops and generals, the national army often fights this kind of battle, but Fu Zuoyi once again showed its extraordinary, he used the famous Ming plank road in the history of war, secretly crossed the Chen Cang clever plank, the sound of the east and the west, completely concealed the direction of the attack, before receiving the appointment of Chiang, Fu has done a lot of and full preparations, in order to play the realistic, to create a full illusion for the communist army, since late September, Fu sent a group of people to take the train to disguise as the main force, Under the cover of armored vehicles, every day from Datong to Yanggao, the original car returned to Datong at night, going back and forth for several days, making a posture of moving a large corps, and the commander of the 12th Theater sent personnel to Datong to fight the front station, the house, requisition grain, and threatened that the army would assemble in Datong, and Fu Zuoyi himself would personally go to Datong to command the attack. In this way, the People's Liberation Army firmly believes that Fu's main direction of attack is on the front line of Datong, Yanggao, and Chaigoubao.

In fact, the main force of Fu's army was gathered in the Jining area, avoiding the real and attacking the weak, and was about to stage the largest and magnificent march in modern history. On September 29, 1946, the Eastern Front campaign began, the 16th Army, the 94th Army and the 53rd Army of the National Army each began to storm fiercely, and the main force of the Shanxi-Chahar-Hebei Military Region launched a fierce battle on the Eastern Front, because the People's Liberation Army was prepared in advance, concentrated the main force, the National Army did not have an advantage, so the progress was slow, and there were considerable losses of two regiments and a battalion, after more than 10 days of fierce fighting, the Eastern Front National Army was blocked in the area east of Huailai.

Seeing that the war on the Eastern Front was not going well, Jiang's old trick was repeated, and Zhangjiakou was placed under the jurisdiction of the 12th War Zone, so Fu's army, which had been waiting for preparations, immediately dispatched to Zhangjiakou and took the central city of Zhangjiakou. The main force of the Fu army was assembled in Jining, commanded by Dong Qiwu, the commander of the Provisional Third Army, and commanded Yang Weiyuan's Temporary 11th Division, Guo Jingyun, the 101st Division of the 35th Army, and the An Chunshan Division of the New 31st Division.

Jin Shuke, commander of the mechanized unit, has the following units under his jurisdiction:

1. Wei Zhiguo, commander of the first regiment of the baggage army.

2. American 105 mm ** artillery battalion, battalion commander Li Bingxing.

3. A battalion of anti-aircraft artillery, battalion commander Fan Chunhuai.

4. Tank Brigade of the Commander's Department of the 12th Theater; Captain Jin Shuke and concurrently, there are 2 companies of medium tanks, (each company has 12 Japanese Type 97 medium tanks) and the company commanders are Wang Zirong and Tian Zhixin.

5. A company of small tanks, 12 Japanese light 95 vehicles, company commander Liu Jianye.

6. A regiment of automobile soldiers, headed by Yao Yubin.

7. An ironclad car brigade, captain Li Xiutian.

The above elite main force, a total of more than 20,000 people, gathered in the area of Jining Rose Camp, ready to dispatch, its strategic guidelines are "the means of surprise attack, preparation for strong attack," to make two preparations, that is, to prepare for the surprise attack effect, but also to prepare for a strong attack.

Lu Yinglin, commander of the 35th Army, led the 32nd Division of the Army, Li Mingding, and the 17th Provisional Division Zhu Dachun, both as feint troops, located in Datong and Fengzhen, and as second-line troops, preparing to reinforce Dong Qiwu's main force. The main direction of attack, unexpectedly did not take the railway, did not pass through Datong, but set off from the Jining Rose Camp, around the barren and uninhabited land outside the Great Wall, to the grassland and mountainous areas north of Zhangjiakou, from the west to the north to the south, with lightning speed, from the rear to the empty direction of Zhangbei, to kill the back door of Zhangjiakou's weak troops. In this way, the main forces of the Fourth Column and the Jinsui Military Region, which were guarding the front line of Chaigou Fort from east to west, were useless, wasted, and had no effect.

On October 8, 1946, Fu gave full play to the superiority of the cavalry, with Liu Chunfang's cavalry of the 4th Division as the vanguard, and left aside the main force of the 4th Column of Jinsui in North China on the first line of Chaigou Fort. Cavalry commander Sun Lanfeng led Liu Chunfang to cavalry 4 divisions, Eyou three cavalry 12 brigades, from Jining rose camp to Shangyi between, all the cavalry upside down cotton clothes, horseshoe wrapping, first crossed the grassland, and then through the ravine straight to the south trench, Daqinggou and smoothly occupied, the forward Liu Chunfang on the one hand, while blocking the news, no matter what kind of people encountered on the way to the march, all detained by the troops, follow the troops, so as not to leak the news, October 9 at about 2 o'clock in the afternoon, has broken into the Zhangbei County 5 kilometers, reconnaissance, Prepare for the offensive.

The troops of the Seventh Army Division, which served as a guard in Zhangbei, mistakenly thought that it was a small group of enemy cross-talk, that is, they sent two cavalry regiments to set off on a detour to encircle and annihilate the enemy, and Zhangbei only left one company and two guard platoons to garrison it.

Besides, the 4th Cavalry Division found that the defenders in the city were not on guard, so Liu Chunfang immediately sent a regiment of elite cavalry to launch a fierce attack and rushed to the base of the city wall in one go. Immediately climbed the city wall from the southwest and northwest corners, the defenders in the city were defenseless, rushed to the battle, still fought bravely, the Fu army was vigorous, wielding sabers and ***, carrying out close combat, white-knuckle combat, the defenders retreated to the city while fighting. When Zheng Weishan learned of the news that the enemy's main force was attacking Zhangbei County, he immediately ordered the main force of the guard regiment to rush to Zhangbei by car for reinforcements. Due to the bombing and strafing of enemy planes along the way, the delay time, when arriving in Zhangbei, Fu Zhi's large troops have arrived one after another, the two sides launched a fierce street battle in Zhangbei City, after more than 3 hours of fighting, the defenders suffered heavy casualties, unable to resist the sudden attack, withdrew in the direction of Chongli, and at more than five o'clock in the afternoon of the 9th, the fourth cavalry division occupied Zhangbei County. On October 10, Zhou Jun, director of the Political Department of the 12th Theater Commander's Department, led a team to enter Zhangbei County for reception.

Zhangbei County is only a sentinel battle, the fiercest battle took place in the wolf's nest, the news of the loss of Zhangbei County reached Zhangjiakou, Nie felt that the situation was serious, the main force was all on the eastern front, although an urgent order was issued to draw back, but it was difficult to rush back for a while, Zhangjiakou was empty, Nie immediately sent Li Xiang Teaching Brigade, which had just participated in the Jining Campaign after reorganization, and rushed to the front line of the dangerous wolf's nest between Zhangbei and Zhangjiakou to fight the enemy, and the teaching brigade was injured in the Battle of Jining, and after resting, replenishing a large number of local armed forces, just returned to Zhangjiakou.

The Battle of Wolf's Nest was a key battle in the Battle of Zhangjiakou, which determined the survival of Zhangjiakou and was also skipped by all the information in the past, so this article focuses on the Battle of Wolf's Nest and the subsequent occupation of Zhangjiakou.

Wolf's Nest Ditch is the most dangerous pass of Yehuling (Yin Mountain), it is the enemy of soldiers since ancient times, it is 25 kilometers away from Zhangjiakou, divided into two villages of big and small wolf's nest, it is the main road that must pass through Zhangjiakou from Zhangbei to Zhangjiakou. The Soviet-Mongolian coalition army marched into Zhangjiakou and fought fiercely with the Japanese army in the wolf's den. Tang and Khitan had a big battle in the wolf's den. Genghis Khan and the Jin soldiers fought a decisive battle in the wolf's den. The late Fu County magistrate of Zhangbei County once had a famous poem to commemorate the Wild Fox Ridge and the Wolf's Nest Valley: "The wild fox resort has been passed down from ancient to modern times, and the road is dangerous and the mountains are high and the clouds are on the Han side."