Battle of Bang Bo (Zhennan Pass)

Infobox Military Conflict
conflict=Battle of Bang Bo (Zhennan Pass)
partof=Sino-French War, Tonkin campaign


caption=Chinese fortifications at Zhennan Pass
date=24 March 1885
place=Lang Son, Vietnam
casus=
territory=
result=Chinese victory
combatant1=flagicon|France France
combatant2=flagicon|Qing Dynasty China
commander1= François de Négrier
commander2= Pan Dingxin
strength1=1,600 men
strength2=32,000 men
casualties1=70 killed, 188 wounded
casualties2=2,000 to 3,000 killed and wounded
notes=

The Battle of Bang Bo, known in China as the battle of Zhennan Pass (Chinese:鎮南關之役), was an important Chinese victory during the Sino-French War (August 1884–April 1885). The battle, fought on 23 and 24 March 1885 on the Tonkin-Guangxi border, saw the defeat of 1,600 soldiers of General François de Négrier's 2nd Brigade of the Tonkin Expeditionary Corps by a Chinese army of 32,000 men under the command of the Guangxi military commissioner Pan Dingxin (潘鼎新). The battle set the scene for the French retreat from Lang Son on 28 March and the conclusion of the Sino-French War in early April in circumstances of considerable embarrassment for France.

The Tonkin military stalemate, March 1885

On 17 February 1885 General Louis Brière de l'Isle, the general-in-chief of the Tonkin Expeditionary Corps, left Lang Son with Lieutenant-Colonel Laurent Giovanninelli's 1st Brigade to relieve the Siege of Tuyen Quang. On 3 March, at the Battle of Hoa Moc, Giovanninelli's men broke through a formidable Chinese blocking position and relieved the siege. Before his departure Brière de l'Isle ordered General François de Négrier, who remained at Lang Son with the 2nd Brigade, to press on towards the Chinese border and expel the battered remnants of the Guangxi Army from Tonkinese soil. After resupplying the 2nd Brigade with food and ammunition, de Négrier defeated the Guangxi Army at Dong Dang on 23 February and cleared it from Tonkinese territory. For good measure, the French crossed briefly into Guangxi province and blew up the 'Gate of China', an elaborate Chinese customs building on the Tonkin-Guangxi border. They were not strong enough to exploit this victory, however, and the 2nd Brigade returned to Langson at the end of February.

By early March, in the wake of the French victories at Hoa Moc and Dong Dang, the military situation in Tonkin had reached a temporary stalemate. Giovanninelli's 1st Brigade faced Tang Jingsong's Yunnan Army around Hung Hoa and Tuyen Quang, while de Négrier's 2nd Brigade at Lang Son faced Pan Dingxin's Guangxi Army. Neither Chinese army had any realistic prospect of launching an offensive for several weeks, while the two French brigades that had jointly captured Lang Son in February were not strong enough to inflict a decisive defeat on either Chinese army separately. [Huard, "La guerre du Tonkin", 499–504 and 661–3; Lecomte, "Lang-Son", 408–15; Thomazi, "Histoire militaire de l’Indochine française", 110–11; Thomazi, "La conquête de l’Indochine", 250–2] Brière de l'Isle and de Négrier examined the possibility of crossing into Guangxi with the 2nd Brigade to capture the major Chinese military depot at Longzhou, but on 17 March Brière de l'Isle advised the army ministry in Paris that such an operation was beyond their strength. Substantial French reinforcements reached Tonkin in the middle of March, giving Brière de l'Isle a brief opportunity to break the stalemate. He moved the bulk of the reinforcements to Hung Hoa to reinforce the 1st Brigade, intending to attack the Yunnan Army and drive it back beyond Yen Bay. While he and Giovanninelli drew up plans for a western offensive, he ordered de Négrier to keep the Chinese in respect around Lang Son.

Meanwhile, behind the Chinese border, the Guangxi Army was also building up its strength. The French, whose Vietnamese spies in Longzhou had been conscientiously counting the company flags of every Chinese battalion that passed through the town, estimated on 17 March that they were facing a Chinese force of between 40,000 and 50,000 men. This was an exaggeration, based on the assumption that each Chinese company of 300 to 400 men was at full strength. In fact most of the Chinese commands were considerably understrength, and the strength of the Guangxi Army at the Battle of Zhennan Pass was probably around 32,000 men. Even at this lower strength, it fearfully outnumbered the French. [Lung Chang, "Yueh-nan yu Chung-fa chan-cheng", 336]

French and Chinese forces

By the middle of March nine separate Chinese military commands were massed close up to the Tonkinese border around the enormous entrenched camps of Yen Cua Ai and Bang Bo. There were six main Chinese concentrations. The entrenched camp of Yen Cua Ai was held by ten battalions under the command of Feng Zicai (馮子材) and a slightly smaller force under the command of Wang Xiaochi (王孝祺). These two commands numbered perhaps 7,500 men in all. Two to three kilometres behind Yen Cua Ai, around the village of Mufu, lay the commands of Su Yuanchun (蘇元春) and Chen Jia (陳嘉), perhaps 7,000 men in all. Fifteen kilometres behind Mufu the commands of Jiang Zonghan (蔣宗漢) and Fang Yusheng (方友升), also 7,000 strong, were deployed around the village of Pingxiang (known to the French from its Vietnamese pronunciation as Binh Thuong). The commander of the Guangxi Army, Pan Dingxin (潘鼎新), lay at Haicun, 30 kilometres behind Mufu, with 3,500 men. Fifty kilometres to the west of Zhennanguan, 3,500 men under the command of Wei Gang (魏綱) were deployed around the village of Aiwa. Finally, fifteen kilometres to the east of Zhennanguan, just inside Tonkin, Wang Debang (王德榜) occupied the village of Cua Ai with 3,500 men. [Lung Chang, "Yueh-nan yu Chung-fa chan-cheng", 334]

De Négrier's 2nd Brigade numbered around 2,500 men. The brigade's order of battle in March 1885 was as follows:

*3rd Marching Regiment (Lieutenant-Colonel Herbinger)
**23rd Line Infantry Battalion (Lieutenant-Colonel Godart)
**111th Line Infantry Battalion ("chef de bataillon" Faure)
**143rd Line Infantry Battalion ("chef de bataillon" Farret)

*4th Marching Regiment (Lieutenant-Colonel Donnier)
**2nd Foreign Legion Battalion ("chef de bataillon" Diguet)
**3rd Foreign Legion Battalion (Lieutenant-Colonel Schoeffer)
**2nd African Light Infantry Battalion ("chef de bataillon" Servière)

*1st Battalion, 1st Tonkinese Rifle Regiment ("chef de bataillon" Jorna de Lacale)
*3 artillery batteries (Captains Roperh, de Saxcé and Martin).

Roussel's battery, of Giovanninelli's 1st Brigade, was also at Lang Son. The battery had lagged behind during the Lang Son Campaign, and Giovanninelli had left it at Lang Son when he set out with the 1st Brigade to relieve Tuyen Quang.

Not all of the 2nd Brigade was stationed at Lang Son and immediately available for action. The four companies of Servière's 2nd African Battalion were echeloned between Lang Son and Chu, guarding the vital French supply line up to Lang Son and labouring to improve the miserable paths over which the expeditionary corps had advanced in February into a surfaced wagon road.

The battle of Bang Bo (Zhennan Pass), 23 and 24 March 1885

On 22 March Chinese forces under the command of Feng Jicai raided the French forward post at Dong Dang, a few kilometres north of Lang Son. The French post, under the command of Lieutenant-Colonel Paul-Gustave Herbinger, was held by "chef de battalion" Diguet's 2nd Foreign Legion Battalion, and the legionnaires repelled the Chinese assault without difficulty. De Négrier, who had been forced to bring the bulk of the 2nd Brigade up from Lang Son to support Herbinger, decided to hit back immediately. Hoping to take the Chinese by surprise, he decided to cross the frontier and attack the Guangxi Army in its entrenchments at Bang Bo, near the frontier pass of Zhennanguan. He had no intention of launching a major offensive into Guangxi. His aim, in the military phrase of the day, was simply to 'take some air' ("se donner de l'air") around Dong Dang. After giving the Chinese a bloody nose at Bang Bo and clearing them away from the approaches to Dong Dang, he would return to Lang Son with the 2nd Brigade. [Armengaud, "Lang-Son", 39–40; Harmant, "La vérité sur la retraite de Lang-Son", 203–9; Lecomte, "Lang-Son", 420–8; Normand, "Lettres du Tonkin", 217–28; "Notes sur la campagne du 3^e bataillon de la légion étrangère au Tonkin", 31–2]

Leaving "chef de bataillon" Servière to hold Lang Son with a single company of the 2nd African Battalion and Martin and Roussel's batteries, and stationing the 23rd Line Battalion at Dong Dang to protect his supply line, he advanced to the Chinese frontier at Zhennanguan on the morning of 23 March with a force of only 1,600 men and 10 guns (the 111th and 143rd Line Battalions, the 2nd and 3rd Legion Battalions and Roperh and de Saxcé's batteries). Substantial reinforcements for the 2nd Brigade were already on their way up to Lang Son, but de Négrier decided not to wait for them. He judged it more important to attack the Chinese while they were still discouraged by Feng Zicai's repulse on 22 March.

On 23 and 24 March the 2nd Brigade fought a fierce action with the Guangxi Army near Zhennanguan. This engagement, known as the Battle of Zhennan Pass in China, is normally called Bang Bo in European sources, after the name of a village in the centre of the Chinese position where the fighting was fiercest. The French took a number of outworks on 23 March, and defeated a hesitant Chinese counterattack against their right flank launched by Wang Debang from Cua Ai.

On 24 March de Négrier attacked the Guangxi Army's main positions around Bang Bo. His plan called for a simultaneous frontal and rear attack on Feng Zicai's troops, who were holding a line of trenches in front of Bang Bo known to the French as the 'Long Trench'. The frontal attack would be delivered by Faure's 111th Battalion and the rear attack by Diguet's 2nd Legion Battalion and Farret's 143rd Battalion. Herbinger, who was instructed to guide Diguet and Farret to their attack positions, led the two battalions in a wide outflanking march in thick fog, and lost his way. De Négrier, unaware that Herbinger had failed to reach his positions, and mistaking a column of Chinese troops moving up to the Long Trench for Herbinger's two battalions, ordered "chef de bataillon" Faure's 111th Battalion to deliver its planned frontal attack. The men of the 111th laid down their haversacks, formed up, and charged. The battalion came under heavy frontal fire from Feng Zicai's infantry and flanking fire from Chinese units on the nearby hills, and lost several company officers within seconds. Two of its four companies reached the trench, but after a short spell of hand-to-hand fighting were thrown back by a Chinese counterattack led personally by Feng Zicai. The senior surviving French company officer, Captain Verdier (who later wrote a detailed account of the campaign, "La vérité sur la retraite de Lang-Son", under the pseudonym Jacques Harmant), was able to disengage and rally the battalion. The Chinese, intent on beheading the French wounded and plundering the abandoned French haversacks, did not seriously pursue the 111th Battalion, and Verdier was able to withdraw its shredded companies to safety.

On the right of the battlefield, the 143rd Battalion and 2nd Legion Battalion went into action several hours later than expected, and captured a Chinese fort. It was the only French success of the day. At 3 p.m. Pan Dingxin, seeing the 111th Battalion in full retreat and Herbinger's men exhausted from their exertions, counterattacked along the entire front. Herbinger's command was nearly cut off. Captain Gayon's company of the 143rd Battalion was surrounded by the Chinese. Captain Cotter of Diguet's Legion battalion, ignoring an order from Herbinger to leave Gayon to his fate, led his Legion company to the rescue. The legionnaires charged and successfully disengaged Gayon's men, but Cotter was killed in the attack. Diguet and Farret's battalions fell back by echelons, constantly turning and firing to keep the Chinese in respect. Meanwhile, Schoeffer's 3rd Legion Battalion, which had been ordered to remain on Tonkinese soil around Dong Dang to protect the flanks of the French column, fought desperately to keep open a line of retreat for the 2nd Brigade. Schoeffer's men beat off strong Chinese attacks on both French flanks, enabling the other three infantry battalions and the two artillery batteries to make good their retreat. General de Négrier fought with the French rearguard, setting an example of personal courage, and the Chinese were unable to convert the French retreat into a rout.

Although the French made a fighting withdrawal from the battlefield and prevented the Chinese from piercing their line, casualties in the 2nd Brigade were relatively heavy (70 dead and 188 wounded) and there were ominous scenes of disorder as the defeated French regrouped after the battle. As the brigade's morale was precarious and ammunition was running short, de Négrier decided to fall back to Lang Son. Chinese casualties at Zhennan Pass were far heavier than French casualties, and may have amounted to between 2,000 and 3,000 men killed or wounded. [Armengaud, "Lang-Son", 40–58; Bonifacy, "A propos d’une collection des peintures chinoises", 23–6; Harmant, "La vérité sur la retraite de Lang-Son", 211–35; Lecomte, "Lang-Son", 428–53 and 455; Maury, "Mes campagnes au Tong-King", 185–203; "Notes sur la campagne du 3^e bataillon de la légion étrangère au Tonkin", 32–40]

ignificance

The French defeat at Bang Bo on 24 March 1885 shook the nerve of several French politicians who had earlier supported France's war against China. More importantly, it convinced Lieutenant-Colonel Paul-Gustave Herbinger, de Négrier's second-in-command, that the 2nd Brigade was dangerously isolated at Lang Son. On 28 March de Négrier was seriously wounded in the battle of Ky Lua, in which the Tonkin Expeditionary Corps defeated an attack by the Guangxi Army on the defences of Lang Son. Herbinger assumed command of the 2nd Brigade, and immediately ordered a retreat to Kep and Chu. The battle of Bang Bo therefore paved the way for the Retreat from Lang Son and the collapse of Jules Ferry's administration on 30 March in the Tonkin Affair.

The victory at Zhennanguan is understandably remembered with pride in China to this day, as is Feng Zicai's stirring admonition to his soldiers: 寧死不忍見法軍侵入中國境內, 'You should die rather than allow a French army to invade Chinese soil!' However, this pride has sometimes been taken too far. Some modern Chinese accounts of the battle, perhaps based on the inflated reports habitually submitted by Chinese generals during the Sino-French War, have exaggerated the French losses at Zhennanguan absurdly. It has been claimed, for example, that the French lost more than 1,000 men at Zhennanguan, almost the entire strength of their forces engaged. The true figure (see above) was far lower. [Lung Chang, "Yueh-nan yu Chung-fa chan-cheng", 336]

Notes

References

* Armengaud, J. L., "Lang-Son: journal des opérations qui ont précédé et suivi la prise de cette citadel" (Paris, 1901)
* Bonifacy, "A propos d’une collection des peintures chinoises représentant diverse épisodes de la guerre franco-chinoise de 1884-1885" (Hanoi, 1931)
* De Lonlay, D., "Au Tonkin, 1883-1885" (Paris, 1886)
* Dreyfus, G, "Lettres du Tonkin, 1884-6" (Paris, 1888)
* Grisot and Coulombon, "La légion étrangère de 1831 à 1887" (Paris, 1888)
* Harmant, J., "La verité sur la retraite de Lang-Son" (Paris, 1892)
* Hocquard, C., "Une campagne au Tonkin" (Paris, 1892)
* Lecomte, J., "Lang-Son: combats, retraite et négociations" (Paris, 1895)
* Lung Chang [龍章] , "Yueh-nan yu Chung-fa chan-cheng" [越南與中法戰爭, Vietnam and the Sino-French War] (Taipei, 1993)
* Nicolas, V., "Livre d'or de l'infanterie de la marine" (Paris, 1891)
* Maury, A., "Mes campagnes au Tong-King" (Lyons, undated)
* Normand, R., "Lettres du Tonkin" (Paris, 1886)
* "Notes sur la campagne du 3^e bataillon de la légion étrangère au Tonkin" (Paris, 1888)
* Sarrat, L., "Journal d'un marsouin au Tonkin, 1883-1886" (Paris, 1887)
* Thomazi, "Histoire militaire de l’Indochine française" (Hanoi, 1931)
* Thomazi, A., "La conquête de l'Indochine" (Paris, 1934)

ee also

*Imperialism in Asia
*French colonial empires
*Jules Ferry