3.155 Fall and Rise of China: Operation Chahar 1937

Last time we spoke about the Marco Polo Bridge Incident. On July 7, 1937, tensions escalated between Japan and China as the Japanese military conducted a training exercise near the Marco Polo Bridge. During the exercise, gunfire erupted, sowing confusion and leading to the unexplained disappearance of one soldier. This incident prompted Japan to demand permission to search the nearby city of Wanping, which was denied by Chinese forces, escalating tensions further. By the next day, Japanese troops attacked, resulting in fierce fighting at the bridge. Under heavy assault, Chinese defenders fought valiantly but faced overwhelming force. As the conflict intensified, both sides struggled with heavy casualties, leading to the full-scale Sino-Japanese War. The Japanese military's aggressive maneuvers and the determined Chinese resistance marked the beginning of a brutal conflict, forever altering the landscape of East Asia. The profound toll on both nations foreshadowed the horrors of war that were to come, as China prepared to defend its sovereignty against a relentless enemy.

 

#155 Operation Chahar 1937

Welcome to the Fall and Rise of China Podcast, I am your dutiful host Craig Watson. But, before we start I want to also remind you this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Perhaps you want to learn more about the history of Asia? Kings and Generals have an assortment of episodes on history of asia and much more  so go give them a look over on Youtube. So please subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry for some more history related content, over on my channel, the Pacific War Channel where I cover the history of China and Japan from the 19th century until the end of the Pacific War.

By the end of July of 1937 the Japanese had overwhelmed the Beiping-Tianjin region. It's pretty understandable as to how this came so fast. As we have discussed thoroughly in this series, the Japanese had gradually seized control over Northern China going back to Operation Nekka in 1933. Little by little they had carved it out. Typically when you pull out a map of a war between two nations, one nation pierces into the other and gradually seizes control of key locations until it archives victory. However with the case of the outset of the Second Sino-Japanese War its more like the Japanese are starting at multiple key locations where they have concessions, treaties or where there are autonomous regions. Thus its honestly a huge headache to follow. When the Marco Polo Bridge Incident broke out, Chiang Kai-Shek had been in Kuling, a mountain top resort where he spent his summer vacations. He received the news with composure, but his message to the nation conveyed a sense of optimism and anticipation. The embarrassment of the Sian mutiny was a thing of the past. Although he wasn't overly confident, he believed that this was the pivotal moment China had been preparing for, more so than at any time in recent years.

For nearly three weeks, efforts were made to resolve the situation through diplomatic means. For the first time, Chiang was in a position to make demands. He understood they would likely be rejected, but that wasn't the main point. He asked Japan to acknowledge its responsibility for the recent turmoil, to issue an apology, and to provide compensation. After making that request, he addressed his nation with a formal commitment: China would not accept any settlement that compromised its sovereign rights or territorial integrity. No changes would be permitted regarding the status of the Hubei-Chahar Council, and local officials would not be reassigned at the request of any foreign government. Any restrictions on the Twenty-ninth Army's positions would be unacceptable. He declared that the era of Japanese expansion in North China had come to a definitive end.

The Japanese army achieved significant victories on the battlefield in China, leading to the inevitable expansion of the conflict. The first major campaign following the Nanyuan victory unfolded along the mountainous border marked by the inner Great Wall, separating northern Hubei from Chahar. On the Jinpu Railway, just south of Tianjin, lies a small station known as Jinghai. Adjacent to this station is the Jian River, which had swollen to a width of 20 meters due to intermittent heavy rains in northern China after the Japanese army's occupation of Tianjin. The embankments on either side of the river were overgrown with dense reeds and grass, and a wooden arch bridge spanned the river. After landing at Dagukou in Tianjin, the 10th Division, commanded by Lieutenant General Rensuke Isogai, advanced south along the Jinpu Railway. However, as the vanguard, the 10th Regiment of the 33rd Brigade made its way through the muddy terrain towards the Jian River's wooden bridge, they were suddenly taken aback.

A group of Chinese soldiers appeared, their faces vividly painted red and armed with long-handled broadswords, a sight reminiscent of the legendary Chinese figure Guan Yu, as depicted in many traditional portraits. These soldiers belonged to the 26th Independent Brigade of the 38th Division of the 29th Army, who were in retreat from Tianjin. Following the city’s fall, they had retreated southward to Jinghai Station, where they prepared to make a stand. Brigade Commander Li Zhiyuan recognized their inferior numbers and weaponry compared to the Japanese forces. Drawing from painful lessons learned during the positional battles in Tianjin, he decided to divide his troops strategically: one battalion would defend the station, another would protect the county town, and a third would engage in guerrilla tactics along the Jinpu Road. If faced with a small number of Japanese soldiers, they would fight fiercely; if overwhelmed, they would attempt to encircle the attackers to prevent a direct assault on their main position.

Despite the Japanese army's attempts to advance, including efforts to send an armored train into Jinghai Station, the Chinese soldiers cleverly laid straw on the tracks and buried mines, thwarting the train's progress. Once Japanese troops disembarked to mount an offensive, they were ambushed by the battalion executing guerrilla tactics, resulting in a chaotic retreat that left behind several dozen casualties. Over the course of weeks, the divisional headquarters ordered a battalion of Japanese troops to move south along the Jinpu Road, requiring them to cross the Jian River at the wooden bridge. The 26th Independent Brigade was assigned to halt this advance, and they managed to hold their ground for over 20 days.

Recognizing the gravity of their situation, Brigade Commander Li Zhiyuan gathered his group and battalion commanders to emphasize the necessity of pushing back the Japanese forces. He passionately rallied them, declaring, “We must defend this river to the death. Each regiment will select a death squad. Each member will carry a long-handled broadsword and four grenades, paint their faces red and rush across the bridge to engage in melee combat!” When Li asked for volunteers to lead the death squad, the regiment commander, Zhu, eagerly stepped forward, quickly gathering a group that followed him, uniting passionately in their cause. The death squad charged across the bridge, catching the Japanese off guard with their war paint and weapons. The sudden attack left the Japanese soldiers dazed, leading to a chaotic retreat as they struggled through the muddy terrain. In the tumult, more than 200 long-handled swords struck down a significant number of Japanese troops. Those advancing from behind panicked at the sight of their retreating comrades. An officer, dismounted during the chaos, was left behind, and the Chinese soldiers, filled with zeal, pressed forward, ignoring the orders from Brigade Commander Li Zhiyuan to fall back for their own safety. Despite moments of heroism, many fell that day by the Jian River, as the officers and soldiers burned their boats and set fire to the wooden bridge, rendering retreat impossible. As the Japanese military consolidated its power in the Pingjin region, many leaders underestimated the tenacity of Chinese resistance. Plans were made to defeat the Chinese army and air force swiftly, aiming to resolve the issue in North China decisively, with no diplomatic negotiations or external interventions allowed during military operations.

Now, in late July to early August, Chiang Kai-shek issued orders to improve defenses at Nankou. He mobilized Tang Enbo's 13th Army in Suidong for battle readiness, tasked Liu Ruming to sabotage railways, and directed Fu Zuoyi and Yan Xishan in Suiyuan to prepare for conflict. Troops were reorganized rapidly, with divisions merging to strengthen the 17th Army under Liu Ruming's command. Chiang insisted that Nankou's defenses be deep and wide to thwart enemy cavalry and tank assaults, rendering Japanese mechanized advantages ineffective. He called for close cooperation among commanders and a resolute defense. Tang Enbo's 13th Army, consisted of the 4th and 89th Divisions, whom established defensive positions along the Peiping-Suiyuan Railway at Nankou, with additional units positioned further back at Juyongguan. The 13th Army, was 20,000 men strong, all motivated soldiers committed to fighting the Japanese, but their equipment was woefully inadequate. The 89th Division had a few outdated artillery pieces, whilst other units were in even worse condition, hampering their effectiveness against the well-armed Japanese forces. Liu’s 17th Army stationed its 84th Division at Chihcheng, Yanqing, and Longguan, effectively securing the flank of the 13th Army against potential Japanese advances from Chahar. The 21st Division was deployed in Huailai, situated along the railway to the rear of Tang's forces. Additionally, Zhao Chengshou's 1st Cavalry Army, Liu 's 143rd Division, and two Peace Preservation Brigades commenced an offensive against Mongol forces in northern Chahar.

As the Japanese launched initial assaults on Nankou on August 4, fierce fighting erupted. The Chinese defenders fought valiantly, but heavy bombardments by artillery and air raids took a toll. The Japanese began using tanks to support their infantry, yet the 530th Regiment successfully repelled an attack at Deshengkou. Meanwhile, the Japanese intensified their efforts, culminating in poison gas assaults that overwhelmed Chinese positions on Longhutai, leading to significant losses. Despite the escalating pressure and casualties, the determination to hold Nankou was unwavering. On August 5, the Kwantung Army requested permission for the advance guard to move to Changpei, arguing that the Central Army's invasion of Chahar had jeopardized the security of Manchukuo. This request was denied, yet the advance guard proceeded to Changpei on August 8. This unauthorized movement by the Kwantung Army was a serious act of defiance, as Tolun lay outside Manchukuo's borders, and troop deployments required imperial authorization. Although imperial sanction had been obtained for the move to Tolun on July 28, permission for the advance guard to proceed was only granted retroactively, with the stipulation that they would not advance further into Inner Mongolia. Nevertheless, this unauthorized action ultimately compelled the high command to approve the advance to Changpei.

On August 7, the Japanese army launched a large assault on Nankou with its three main divisions, aiming to breach the Great Wall and advance westward along the Pingsui Railway to flank the strategic city of Shanxi. By August 8, the Japanese forces that had captured Beiping and Tianjin deployed the entire 20th Division, commanded by Lieutenant General Kawagishi Fumisaburo, and supplemented their efforts with the 5th and 10th Divisions, along with the Sakai Brigade, to attack Nankou along the Pingsui Railway. On August 8, the Japanese 11th Independent Mixed Brigade, led by General Shigiyasu Suzuki, initiated an attack on the left flank of the 13th Corps' position at Nankou. However, their efforts were halted after three days due to challenging terrain and the determined resistance from Chinese forces. 

On the same day, Chiang Kai-shek ordered the activation of the 14th Group Army, comprising the 10th, 83rd, and 85th Divisions, under General Wei Lihuang. Elements of the 14th Group Army traveled by rail from Yingchia-chuang to Yi County and then embarked on a ten-day march through the plains west of Beiping to flank and support Tang Enbo's forces. Meanwhile, the Chinese 1st Army Region launched attacks against the Japanese in Liangxiang and Chaili to divert their attention and dispatched a detachment to Heilung Pass to cover the advance of the 14th Group Army. On August 9, the central high command ordered the China Garrison Army to eliminate resistance in the area and instructed Kwantung Army Commander Ueda Kenkichi to send reinforcements from Jehol and Inner Mongolia to support the operation. The China Garrison Army deployed its 11th Independent Mixed Brigade and the 5th Division, recently arrived from Hiroshima under Lieutenant-General Itagaki Seishirö, to launch an attack on the mountainous regions around Nankou and Pataling within the Great Wall. Following intense fighting, they succeeded in crossing into Chahar. 

 

The Kwantung Army aimed to conquer Chahar and, upon receiving approval from the Japanese General Staff, established an expeditionary headquarters on August 14, led by its chief of staff, Lieutenant General Tojo Hideki. Yes that Tojo. Tokyo’s objective was to secure the strategic flank of Manchukuo, while the Kwantung Army sought to create puppet regimes in northern China and integrate the occupied territories into a Japanese sphere of influence. The Chahar Expeditionary Force comprised three mixed brigades, including Japan's only fully mechanized unit, which was equipped with medium tanks, heavy and light armored vehicles, and light tanks.

The Japanese troops shifted their main attack toward Zhangjiakou via the Pingsui Railway due to pressures from the Kwantung Army eager to occupy Inner Mongolia, Suiyuan, and Chahar. They sought to eliminate threats from the rear before launching further operations along the Pinghan Line and Jinpu Line. The 11th Independent Mixed Brigade of the 20th Division of the Chinese Garrison Army was ordered to assault Chinese defenders in the Nankou area, with the goal of capturing key locations on the Great Wall, like Badaling, to facilitate the Fifth Division's advance. The Chinese assessed the Japanese strategy, believing they would first secure critical points along the Pingsui route to facilitate further incursions into Shanxi and Zhengding. They understood that holding the Nankou line was vital for both logistical support and tactical maneuvering. Nankou, a key town on the Pingsui Railway connecting Beijing to Zhangjiakou and Baotou, was surrounded by mountains and the Great Wall, marking it a significant natural defense line. As the Japanese army aimed to capture Zhangjiakou and divide their forces into Shanxi and Suiyuan, the Chinese army's control over Nankou became crucial.

A renewed assault on August 11, bolstered by tanks and aircraft, successfully captured Nankou Station, allowing General Suzuki's brigade to advance toward Juyong Pass. On August 12, Tang Enbo's army launched a counterattack, encircling the Japanese forces and severing their supply and communication lines. That day, Tang Enbo sent a telegram to Luo Fanggui:

“Brother Fanggui, Commander Luo of the 529th Regiment, I have received your telegram. Your regiment has recently defeated formidable enemies, laying the groundwork for our army’s future victories. Your efforts bring me great relief! The Nankou position is critical to our nation's war of resistance. Despite the enemy's numerical superiority and fierce artillery fire, we cannot surrender this area. It is our fighting spirit, not our numbers or advanced weaponry, that will help us withstand these powerful foes. We vow never to abandon our positions. Life is transient, and we must embrace our fate. A hero perishing on the battlefield is the glorious destiny of a soldier.”

On the same day, he also sent a telegram to Wang Zhonglian:

“Brother Jieren Wang, commander of the 89th Division, I have read your telegram. Brigade Li has triumphed against formidable foes, establishing a precedent for our army’s victory. Your successes bring me much comfort! The Nankou position is our glorious objective. If I perish, the country lives on. If I survive, the country perishes. We would rather die defending this position than live in disgrace. Please convey to all the officers and soldiers of your division, who share in this struggle, the importance of striving for victory!”

On August 13, Tang Enbo ordered the defensive positions at Nankou to be abandoned as the remaining troops pulled back to stronger positions at Badaling and Juyongguan. Renowned journalist Fan Changjiang noted Tang Enbo's physical and emotional toll, describing him as a mere shadow of his former self after enduring relentless battles without rest. His subsequent thoughts and fears reflected the despair of facing insurmountable odds, with the Japanese army overwhelming the Nankou defenses. Casualty reports from the Battle of Nankou reveal stark discrepancies; average estimates suggest Chinese losses neared 26,000, while Japanese casualties were around 2,600,an alarming ratio of 10 to 1. Despite the devastating defeat, Tang Enbo’s leadership gained national recognition for his efforts, though he viewed the loss of Nankou as a blemish on an otherwise honorable defense. The indomitable spirit displayed during the relentless struggle at Nankou, despite the defeat and challenges faced, inspired a sense of resilience among the Chinese people, reminding them that even in dire circumstances, they would not yield to oppression. Meanwhile in response to having their supply and communication lines severed, on August 14, Seishirō Itagaki dispatched the 5th Division to relieve the 11th Independent Mixed Brigade at Juyonggua. Fu Zuoyi's troops attacked Chahar from Suidong. Dong Qiwu 's troops attacked Shangdu and recaptured it on the 14th, while Shi Yushan 's troops attacked Dehua and recaptured it on the 16th.

By the 16, Itagaki had arrived at Nankou and initiated an enveloping assault targeting the right flank of the 13th Army, executing a five-pronged attack at Huanglaoyuan. In anticipation, the 7th Brigade of the 4th Division, commanded by Shi Jue, was positioned to counter this maneuver. Reinforcements, including Li Xianzhou's 21st Division and Zhu Huaibing's 94th Division, were brought in, resulting in several days of intense fighting. On August 17, General Yan Xishan, Director of the Taiyuan Pacification Headquarters, ordered the 7th Group Army, commanded by Fu Zuoyi, to move the 72nd Division and three additional brigades by rail from Datong to Huailai to support Tang Enbo's forces. Chiang Kai-shek urged steadfastness in the face of adversity, emphasizing that retreat was not an option. But with communication breakdowns and logistical challenges, Tang Enbo faced dilemmas that would lead him to issue the order for his troops to break out on August 26. As the Japanese army occupied Huailai and Yanqing, Tang Enbo’s forces executed a withdrawal, retreating via various routes before suffering further losses. 

Meanwhile Liu Ruming's troops of the 143rd Division of the 29th Army took Zhangbei from Zhangjiakou . Proceed to Wanquan Dam , the junction of Wanquan and Zhangbei. The members of the pseudo-Mongolian military government fled to Duolun under the leadership of King De . In order to relieve the danger in Zhangjiakou, Liu Ruming's troops began to attack the enemy in Zhangbei. On August 20, they captured key points such as Bolicai Village outside Zhangbei City. At this time, the mechanized troops of the Japanese Kwantung Army led by Hideki Tojo rushed from Rehe to support Zhangbei. When passing through Guyuan, they were divided into two groups: one group of Japanese troops, the Suzuki Brigade and Homma Brigade went south to attack Zhangjiakou. On the night of August 21, the Chinese army retreated to Shenweitai, 25 kilometers south of Zhangbei County. On August 22, the Japanese army began its attack. Shenwei Tower fell at midnight on the 23rd. At the same time, another part of the Japanese army launched a roundabout attack on Wanquan County. On the morning of August 24, they captured Wanquan County, and then headed straight for Zhangjiakou along the highway with an infantry regiment and an artillery battalion. From August 25 to 27, the Japanese army attacked Bajiaotai, the highest point of Cir Mountain west of Zhangjiakou. At noon on the 27th, Zhangjiakou fell. Gao Guizi's 17th Army marched to Dushikou to resist the enemy from Duolun Akagi and Longguan and intercepted the Pingsui Railway. Gao Guizi's troops failed to withstand the Japanese attack, and the 301st Regiment of the 29th Army stationed in Xuanhua also retreated southward. On August 28, Xuanhua fell into the hands of the enemy.

Meanwhile, in northern Chahar, the Chinese 1st Cavalry Army successfully captured Shangdu, Nanhaochan, Shangyi, and Huade from the puppet Mongolian Army led by Demchugdongrub. Elements of the 143rd Division secured Zhongli, while the main force advanced to Zhangbei. During this Chinese offensive, the Japanese Chahar Expeditionary Force, consisting of the mechanized 1st Independent Mixed Brigade along with the 2nd and 15th Mixed Brigades, prepared for a counteroffensive from Zhangbei to Kalgan. Tojo personally commanded the units of the 1st Independent Mixed Brigade during Operation Chahar, which would serve as his only real combat service for his career. From August 18 to 19, the Chahar Expeditionary Force launched a counterattack from Zhangbei, capturing Shenweitaiko on the Great Wall and the Hanno Dam. The scattered and ill-equipped Chinese forces were unable to halt the Japanese advance, which now threatened the Peking–Suiyuan Railway at Kalgan. On August 20, General Fu Zuoyi's 7th Group Army diverted its 200th and 211th Brigades, which had been moving south by rail to join General Tang Enbo's forces, back to defend Kalgan. Fu's remaining 72nd Division arrived to reinforce Chenpien, while his 7th Separate Brigade was dispatched to protect the railhead at Huailai.On August 21, the Japanese forces breached the defenses at the villages of Henglingcheng and Chenbiancheng. General Tang Enbo’s forces, awaiting reinforcements but having suffered over 50% casualties, continued to defend Huailai, Juyong Pass, and Yanqing. Liu Ruming’s 143rd Division retreated to safeguard Kalgan from the advancing Japanese troops.

On August 23, as Seishirō Itagaki's 5th Division advanced toward Huailai from Chenpien against Ma Yenshou's 7th Separate Brigade, advance elements of the 14th Army Group arrived on the Japanese flank at Chingpaikou. They successfully drove off the Japanese outpost and made contact with Japanese forces advancing toward Chenpien. However, delays in crossing the Yongding River postponed their attack until it was too late to halt the Japanese advance. Due to poor communications, they also failed to coordinate with General Tang Enbo's forces during the battle. After eight days and nights of fierce fighting, on August 24, Itagaki linked up with the Kwantung Army's 2nd Independent Mixed Brigade at Xiahuayuan.

By August 24, the Japanese army breached the defensive line of the Chinese defenders' Wang Wanling Division along the western Hengling, crossed the Great Wall, and advanced into the Huailai area. At this time, the Japanese forces attacking Zhangjiakou from Chabei also secured control of the railway line west of Zhangjiakou, posing a significant threat to the Chinese defenders at Nankou. On August 25, the Chinese defenders were compelled to withdraw from Nankou and retreat to Juyongguan. By August 27, they received orders to break out and relocate southward, completely evacuating the Nankou battlefield. Since Wei Lihuang's troops lost their intended target for reinforcement and Baoding along the Pinghan Line was in a state of emergency, they engaged the enemy in the Wanping area for over a month before retreating south. Following the abandonment of both Nankou and Juyongguan, the Japanese army invaded Huailai City on the night of August 27. The Chinese army suffered over 16,000 casualties, while the Japanese army reported more than 15,000 casualties.

On August 26, General Tang Enbo's forces were ordered to break out toward the Sangchien River, while Liu Ruming's troops were directed to withdraw to the opposite side of the Hsiang-yang River. On August 29, a Japanese unit known as the Oui Column by the Chinese and the Ohizumi Detachment by the Japanese launched an attack. According to Hsu Long-hsuen, this unit moved south from Tushihkou, and on August 30, it attacked Yenching via Chihcheng but was repelled by the Chinese 17th Army. The unit had moved to Guyuan by August 25 and reached Xuanhua by September 7, effectively cutting the railway behind Tang's forces and east of the Chinese defenders along the Great Wall. Following the repulsion of the Oui Column's attack, the Chinese 17th Army withdrew to join the rest of Tang Enbo's forces on the far side of the Sangchien River. Kalgan fell to the Japanese on August 27. After General Fu Zuoyi's 200th and 211th Brigades failed in their counterattack to recapture Kalgan, Fu's forces retreated to the west to defend the railway to Suiyuan at Chaikoupao. 

On August 30, the army high command ordered the task force and the China Garrison Army to occupy Chahar Province. The North China Area Army deployed Lieutenant General Itagaki Seishiro’s Fifth Division, the theater’s strategic reserve, for this operation. The Japanese forces relied on armored units to breach Chinese defenses and utilized rail lines to transport troops and supplies effectively to critical locations throughout Chahar. Although the First Independent Mixed Brigade's tanks and armored cars demonstrated proficiency, the Kwantung Army’s assessment of the operation criticized the armored units for their lack of shock effect and frequent mechanical breakdowns. Additionally, these vehicles required significant supplies and maintenance, leading the army to deem them ineffective in combat situations. The Second Air Group provided crucial support for the ground offensive in Chahar. From mid-August, this air group, stationed in Chengde and Jingzhou, conducted bombing raids on enemy positions and transport routes, performed reconnaissance missions, and even airdropped supplies to encircled Japanese forces. To match the rapid advance of the mechanized ground forces, air units were repositioned to advanced airfields. After bombing Taiyuan in late August, some units returned to their home bases, leaving behind two fighter squadrons and two heavy bomber squadrons, which formed a provisional air regiment.

By mid-September, the Fifth Division and the Chahar Expeditionary Force were advancing southwest through the rugged mountains of Shanxi Province and captured Datong on September 13. Five days later, anticipating a decisive battle, Lieutenant General Katsuki ordered the Fifth Division to pivot southeast toward Baoding to encircle the retreating Chinese forces. Shortly after repositioning, Itagaki learned from aerial reconnaissance that Chinese units were assembling near Pingxingguan (Dayingzhen) Pass. Concerned that these forces might advance eastward through the pass and threaten his rear, Itagaki dispatched a regimental-sized task force under the command of Major General Miura Keiji, leader of the Twenty-first Brigade, to disperse the enemy troops and control the road on both sides of the pass.

Miura’s task force departed by truck in the mid-afternoon of the following day, but the overland movement proved much slower and more challenging than anticipated. Travelling along a single rutted dirt track through steep mountains, the forty-nine trucks carrying his infantry and heavy weapons, including crew-served machine guns and battalion artillery, could only manage a speed of seven miles per hour. By late afternoon, the lead elements were still about five miles east of the pass when they encountered a few hundred Chinese troops who had retreated after a brief firefight. As night fell, the Japanese moved cautiously forward and reached a village approximately a mile from the pass, where they encountered stiff resistance, including mortar and automatic weapons fire. After successfully repelling a counterattack by the Chinese Seventy-third Division, Miura launched a night assault. Supported by pack artillery and heavy machine guns, two Japanese companies pushed through the pass and seized the high ground on its west side by early morning. However, Chinese reinforcements soon arrived and attempted to reclaim the lost territory, resulting in ongoing fighting for the heights on September 24.

Meanwhile, the Chinese Communist 115th Division, comprising the 685th, 686th, and 687th regiments of the Eighth Route Army, consisting of around 6,000 effective troops under the command of twenty-nine-year-old Lin Biao, maneuvered south around the Japanese rear. By September 24, they had interposed themselves on the road east of the pass, effectively cutting off Miura’s task force from its supply base. That same day, the Central Army’s Seventy-first Division launched several sharp counterattacks against Miura’s outnumbered forces west of the pass, threatening to overrun the Japanese positions. Central Army and Communist forces had planned to attack both flanks of the Japanese at dawn on September 25, but torrential rains delayed the advance of the Central Army reserves. The downpour also muffled the sounds of an approaching Japanese night assault. Utilizing the poor night security of the Chinese, Japanese assault parties surprised the Seventy-first and Eighty-fourth divisions, pushing them from their positions west of the pass. Miura mistakenly believed he controlled both sides of the pass and assumed the Chinese forces were in full retreat. Unbeknownst to him, Lin Biao’s troops had blocked the eastern entrance to the pass, prompting him to order a resupply column with rations and ammunition forward from about fifteen miles east of the pass to replenish his depleted task force.

The supply train, consisting of seventy horse-drawn wagons and eighty trucks, struggled to make progress along the single dirt track, where sections had become muddy bogs due to the heavy rains. Most of the hundred-plus soldiers handling the horses and wagons were untrained and unarmed. The few regular service corps soldiers carried only ten cavalry carbines, while a single infantry platoon of thirty men provided security. The eighty trucks transported another 176 men, most of whom were not infantry. Therefore, the resupply column was ill-prepared for any trouble. Following a sunken road worn down by centuries of caravans, the column approached the pass through a narrow man-made defile, with its sides rising as high as thirty-five feet above the track. Around mid-morning, about four miles east of the pass, the Chinese Communist 115th Division launched an ambush. Communist troops rained grenades and small-arms fire from the high ground overlooking the road onto the trapped convoy. Although the Japanese fought back desperately, the combination of surprise, advantageous terrain, and overwhelming numbers turned the road into a killing ground. The ambush decimated almost all of the teamsters and the infantrymen who protected the wagons. At his field headquarters, Miura heard the heavy gunfire and explosions and quickly ordered a battalion-sized rescue force to assist the convoy. However, the Chinese 685th Regiment, blocking the only road to the trapped supply train, halted the Japanese battalion. Elements of the 685th and 686th regiments then finished off the motorized convoy, with only five trucks at the rear escaping. After looting weapons, equipment, and clothing, the Communists burned the remaining vehicles and withdrew southwest into the rugged mountains. Although the Communists claimed to have killed 3,000 Japanese troops, the more realistic number is around 200. Nonetheless, Lin Biao’s guerrillas had achieved a significant tactical success.

While the 115th Division destroyed the Japanese resupply column east of the pass, the Central Army’s Sixth and Seventh Army Groups, including the Seventy-first Division, launched a series of day and night assaults against Miura’s dispersed units west of the pass. Both sides incurred heavy losses, and the Japanese struggled to maintain control of the high ground as the Chinese fanned out through the valleys and attacked from all sides. Isolated and under heavy attack, the Japanese were low on ammunition, food, and water, lacked proper cold-weather clothing in the frigid mountains, and were greatly outnumbered. They resorted to scavenging ammunition and weapons from fallen Chinese soldiers. Itagaki promptly ordered his 41st and 21st infantry regiments, supported by an infantry regiment from the Kwantung Army located about fifty miles northeast of the pass, to rescue the beleaguered task force. These regiments moved along a narrow mountain road amidst heavy rain, which slowed their progress. The relief force split up about forty miles north of Pingxingguan, with the Twenty-first Regiment swinging westward to outflank the Chinese, while the other two regiments continued toward the pass. To the northwest, the Fifteenth Brigade of the Chahar Expeditionary Force advanced southeastward from Datong to encircle the Chinese. Central Army forces defending along the inner Great Wall, about fifty miles northwest of Pingxingguan, inflicted substantial casualties on the Japanese.

The Japanese Forty-first Regiment finally reached Miura on September 28, and on the same day, the Twenty-first Regiment dislodged the stubborn defenders along the Inner Great Wall, roughly forty miles northwest of the pass, disrupting the entire Chinese defense and threatening to surround the besieging forces. Nonetheless, fighting continued through September 29, when the Second Brigade broke through the Chinese Central Army’s defenses and advanced westward. Facing potential encirclement and certain destruction, the Japanese Sixth Army Group withdrew southwest the following day. Japanese accounts do not specify overall losses, but Chinese reports claim nearly 3,000 Japanese casualties while acknowledging they suffered ten times that number. After five days of intense fighting in rugged terrain, Miura’s forces managed to hold their ground, but their heavy losses and those sustained by relief columns rendered it a Pyrrhic victory. Both Communist and Nationalist Chinese forces retreated southwest, surviving to fight another day. The determination of the Chinese Central Army in both offensive and defensive maneuvers, combined with the skillful hit-and-run tactics of the 115th Division, inflicted significant damage on the Japanese and became a cornerstone of Chinese propaganda.

On October 1, the Japanese General Staff ordered the North China Area Army to destroy the Chinese forces in Shanxi Province, which were estimated to number over twenty divisions from either the Shanxi Army or the Central Army, and were fortifying positions in Taiyuan, Yangquan, and Yuanpingzhen. The Japanese Fifth and Twentieth Divisions advanced toward Taiyuan, while the Fifteenth Division, reinforced by a mixed brigade, launched an assault south from Yuanpingzhen on October 13. The Fifteenth Division quickly encountered strong Chinese resistance from well-prepared defenses, which halted its advance. From October 19 to 26, the Twentieth Division faced thirteen Chinese divisions entrenched near Jiuguan. Although they successfully repelled numerous fierce counterattacks, the division was unable to breach the Chinese lines. A maneuver by one of its regiments to the rear of the Chinese defenses forced a withdrawal of Chinese troops. The reconstituted Fifth Division joined the pursuit of the retreating Chinese forces on November 3, reaching Taiyuan five days later. Meanwhile, the Twentieth Division, moving westward, inflicted heavy losses on the Chinese units that were withdrawing from Taiyuan. Overall, given that the offensive aimed to secure territory, it can be considered a tactical and operational success. Shortly thereafter, all Japanese forces, except for the Twentieth Division, withdrew from Shanxi Province. The Chahar campaign concluded with the Kwantung Army in control of Chahar, Suiyuan, and the northern half of Shanxi Province. The Japanese quickly established puppet regimes in the captured territories.

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In July 1937, tensions between Japan and China erupted following the Marco Polo Bridge Incident, leading to fierce fighting as Japanese troops attacked. Chinese defenders, under command of Chiang Kai-shek, bravely resisted despite overwhelming odds, determined to protect their sovereignty. The Battle of Nankou saw relentless assaults, tank warfare, and desperate defense tactics, revealing the depth of Chinese resolve.