The Battle of Vimy Ridge: A Look into the Tunnelling Operations of World War I| OKWAVE

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These measures gave each platoon a clearer picture of how it fitted into the greater battle plan, and in so doing, reduced the command and control problems that plagued First World War combat. Operations along the Vimy Ridge were accompanied by extensive underground excavations. The Arras–Vimy sector was conducive to tunnelling owing to the soft, porous yet extremely stable nature of the chalk underground. Underground warfare had been conducted on the Vimy sector since 1915. Bavarian engineers had blown twenty mines in the sector by March 1915. By early 1916, German miners had gained an advantage over their French counterparts. British tunnelling companies of the Royal Engineers took over progressively from the French between February and May 1916. The units active around Vimy were the 172nd, 175th, 176th, 182nd, 184th and 185th Tunnelling Companies. On their arrival, the British began offensive mining against German miners, first stopping the German underground advance and then developing a defensive strategy that prevented the Germans from gaining a tactical advantage by mining.

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To assess the consequences of infantry having to advance across cratered ground after a mining attack, officers from the Canadian Corps visited La Boisselle and Fricourt where the mines had been blown on the First day of the Somme. Their reports and the experience of the Canadians at The Actions of St Eloi Craters in April 1916, where mines had so altered and damaged the landscape as to render occupation of the mine craters by the infantry all but impossible, led to the decision to remove offensive mining from the central sector allocated to the Canadian Corps at Vimy Ridge. Further British mines in the area were vetoed following the blowing by the Germans on 23 March 1917 of nine craters along no man's land as it was probable that the Germans were aiming to restrict an Allied attack to predictable points. The three mines already laid by 172nd Tunnelling Company were also dropped from the British plans. They were left in place after the assault and were only removed in the 1990s. Another mine, prepared by 176th Tunnelling Company against the German strongpoint known as the Pimple, was not completed in time for the attack. The gallery had been pushed silently through the clay, avoiding the sandy and chalky layers of the Vimy Ridge but by 9 April 1917 was still 21 metres (70 ft) short of its target.

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Improvements in French artillery tactics, were foreshadowed by the pauses in the creep of the 77th Division barrage on 9 May, which enabled the infantry to keep up and capture ouvrage 123, the fanning-out barrages and hybrid barrages fired on 16 June, the use of chemical shells and artillery observation from aircraft equipped with wireless. The Battle of Aubers Ridge was a British offensive on the Western Front on 9 May 1915 during World War I. The battle was part of the British contribution to the Second Battle of Artois, a Franco-British offensive intended to exploit the German diversion of troops to the Eastern Front. The French Tenth Army was to attack the German 6th Army north of Arras and capture Vimy Ridge, preparatory to an advance on Cambrai and Douai. The British First Army on the left (northern) flank of the Tenth Army, was to attack on the same day and widen the gap in the German defences expected to be made by the Tenth Army and to prevent German troops from being moved south of La Bassée canal. The battle was the initial British component of the combined Anglo-French offensive known as the Second Battle of Artois. The French commander-in-chief, Joseph Joffre, had enquired of Sir John French, commander of the British Expeditionary Force, if British units could support a French offensive into the Douai Plain around late April or early May 1915. The immediate French objectives were to capture the heights at Notre Dame de Lorette and the Vimy Ridge. The British First Army was further north, between La Bassée and Ypres (Belgium). It was decided that the British forces would attack in the southern half of their front line, near the village of Laventie. Their objective in the flat and poorly drained terrain was Aubers Ridge, an area of slightly higher ground 2–3 kilometres (1.2–1.9 mi) wide marked by the villages of Aubers, Fromelles and Le Maisnil. The area had been attacked in the Battle of Neuve Chapelle two months earlier. The battle marked the second use of specialist Royal Engineer tunnelling companies, when men of 173rd Tunnelling Company tunnelled under no man's land and planted mines under the German defences to be blown at zero hour. The course of the Battle of Neuve Chapelle had shown that one breastwork was insufficient to stop an attack and the fortifications opposite the British were quickly augmented. Barbed-wire entanglements were doubled and trebled and 5-foot (1.5 m) deep breastworks were increased to 15–20 feet (4.6–6.1 m) broad, with traverses and a parados (a bank of earth behind the trench to provide rear protection). The two machine-guns per battalion were sited in emplacements at ground level set to sweep no man's land from flanking positions. Aubers Ridge オーベル山稜

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On 25 June, Erich Ludendorff, the First Quartermaster General, suggested to Crown Prince Rupprecht that Group Ypres should withdraw to the Wilhelm Stellung, leaving only outposts in the Albrecht Stellung. On 30 June, the army group Chief of Staff, General von Kuhl, suggested a withdrawal to the Flandern I Stellung along Passchendaele ridge, meeting the old front line in the north near Langemarck and close to Armentières in the south. Such a withdrawal would avoid a hasty retreat from Pilckem Ridge and force the British into a time-consuming redeployment. Lossberg disagreed, believing that the British would launch a broad front offensive, that the ground east of the Sehnen line was easy to defend, that the Menin road ridge could be held, if it was made the Schwerpunkt (point of main effort) of the German defensive effort. Pilckem Ridge deprived the British of ground observation over the Steenbeek Valley, while the Germans could see the area from Passchendaele Ridge, allowing German infantry to be supported by observed artillery fire. Lossberg's judgement was accepted and no withdrawal was made. Main article: Battle of Messines (1917) The first stage in the British plan was a preparatory attack on the German positions south of Ypres at Messines Ridge. The German positions had observation over Ypres and unless captured, would enable observed enfilade artillery-fire against a British attack eastwards from the salient. Since mid-1915, the British had been covertly digging mines under the German positions on the ridge. By June 1917, 21 mines had been filled with nearly 1,000,000 long tons (1,000,000 t) of explosives. The Germans knew the British were mining and had taken some counter-measures but they were taken by surprise at the extent of the British effort. Two of the mines failed to detonate but 19 went off on 7 June, at 3:10 a.m. British Summer Time. The final objectives were largely gained before dark and the British had fewer losses than expected, the plan having provided for up to 50 percent in the initial attack. Battle of Messines (1917) 　メセンの戦い

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The British were to attack the salient that had formed between Bapaume and Vimy Ridge with two armies and the French with three armies from the Somme to Noyon. The attacks were to be made on the broadest possible fronts and advance deep enough to threaten German artillery positions. When Marshal Joseph Joffre was superseded by General Robert Nivelle, the "Chantilly strategy" was altered. A policy of breakthrough and decisive battle to be achieved within 24–48 hours and lead to the "total destruction of active enemy forces by manoeuvre and battle" was returned to. Successive attacks in a methodical battle were dropped and continuous thrusts were substituted, to deprive the Germans of time to reinforce and strengthen their defences. A large amount of heavy artillery fire up to 8 kilometres (5.0 mi) deep, to the rear edge of the German defences would achieve the breakthrough. The infantry advance was to reach the German heavy artillery in one attack and then widen the breach with lateral attacks.

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At approximately 7 km (4.3 mi) in length, and culminating at an elevation of 145 m (476 ft) or 60 m (200 ft) above the Douai Plains, the ridge provides a natural unobstructed view for tens of kilometres in all directions. The ridge fell under German control in October 1914 during the Race to the Sea as the Franco-British and German forces continually attempted to outflank each other through northeastern France. The French Tenth Army attempted to dislodge the Germans from the region during the Second Battle of Artois in May 1915 by attacking their positions at Vimy Ridge and Notre Dame de Lorette. The French 1st Moroccan Division managed to briefly capture the height of the ridge but was unable to hold it owing to a lack of reinforcements. The French made another attempt during the Third Battle of Artois in September 1915 but only captured the town of Souchez at the western base of the ridge. The Vimy sector calmed following the offensive with both sides taking a largely live and let live approach. In all, the French suffered approximately 150,000 casualties in their attempts to gain control of Vimy Ridge and surrounding territory.

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Twelve subways, up to 1.2 kilometres (0.75 mi) long were excavated at a depth of 10 metres (33 ft) and used to connect reserve lines to front lines, permitting soldiers to advance to the front quickly, securely and unseen. Often incorporated into subways were light rail lines, hospitals, command posts, water reservoirs, ammunition stores, mortar and machine gun posts and communication centres. The Germans dug a number of similar tunnels on the Vimy front, to provide covered routes to the front line and protection for headquarters, resting personnel, equipment and ammunition.The Germans also conducted counter-mining against the British tunnellers and destroyed a number of British attempts to plant mines under or near their lines. Prior to the Battle of Vimy Ridge, the British tunnelling companies also secretly laid 13 mines under German positions to destroy surface fortifications before the assault. To protect some advancing troops from German machine-gun fire, as they crossed no man's land during the attack, eight smaller Wombat charges were laid at the end of the subways, to allow troops to move more quickly and safely enter the German trench system, by creating an elongated trench-depth crater that spanned the length of no man's land. At the same time, 19 crater groups existed along this section of the Western Front, each with several large craters.

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The British XVII Corps, commanded by Lieutenant-General Sir Julian Byng, relieved the French Tenth Army in the sector in February 1916, permitting the French to expand their operations at Verdun. The British soon discovered that German tunnelling companies had taken advantage of the relative calm on the surface to build an extensive network of tunnels and deep mines from which they would attack French positions by setting off explosive charges underneath their trenches. The Royal Engineers immediately deployed specialist tunnelling companies along the front to combat the German mining operations. In response to increased British mining aggression, German artillery and trench mortar fire intensified in early May 1916. On 21 May 1916, after shelling both forward trenches and divisional artillery positions from no less than 80 out-of-sight batteries on the reverse slope of the ridge, the German infantry began operation Schleswig Holstein, an attack on the British lines along a 1,800-metre (2,000 yd) front in an effort to eject them from positions along the ridge. The Germans captured several British-controlled tunnels and mine craters before halting their advance and entrenching their positions.

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By mid-morning the mist had cleared, allowing German machine-gunners and artillery to pin the British down around Grote Molen spur and Frezenburg ridge, forestalling a British attack intended for 10:00 a.m.. Around noon, British aircraft on counter-attack patrols, began to send wireless messages warning of German infantry advancing towards all of the front attacked. Similar reports from the ground began in the early afternoon. In the centre German infantry from the 236th Division, 234th Division and 4th Bavarian Division were advancing north of Becelaere–Broodseinde–Passchendaele Ridge, while the 17th Division advanced south of Polygon wood. British artillery immediately bombarded these areas, disrupting the German deployment and causing the German attacks to be disjointed. A German officer later wrote of severe delays and disorganisation caused to German Eingreif units by British artillery-fire and air attacks. A counter-attack either side of Molenaarelsthoek was stopped dead at 3:25 p.m. At 4:00 p.m. German troops advancing around Reutel to the south were heavily bombarded, as were German artillery positions in Holle Bosch, ending the German advance. A German attack then developed near Polderhoek, whose survivors managed to reach the British infantry and were seen off in bayonet fighting. Observation aircraft found German troops massing against Tower Hamlets, on the Bassevillebeek spur and artillery and machine-gun barrages stopped the attack before it reached the British infantry. At 6:50 p.m. the Germans managed to organise an attack from Tower Hamlets to north of Polygon Wood; such German infantry as got through the barrages were "annihilated" by the British infantry. German counter-attacks were only able to reach the new front line and reinforce the remnants of the front divisions. The 236th Division (Eingreif) attacked south of the Ypres–Roulers railway and 4th Bavarian Division (Eingreif) for 2,000 yd (1,800 m) to the north, with field artillery and twelve aircraft attached to each division and the 234th Division in support.

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After thirty minutes, groups of German infantry about 20–30 strong, equipped with pistols and hand grenades, were seen heading for gaps in the British wire and were repulsed by rifle and machine-gun fire. At about 6:00 a.m., the three mines were sprung and another bombardment was fired, before sending another gas cloud, which caused many casualties to a Black Watch company, whose commander had ordered them to remove their gas helmets after the first gas cloud, under the impression that the helmets were useless after one exposure to gas. Behind the second gas cloud, larger parties of German infantry advanced and managed to get into the British trenches for brief periods at three points. At Chalk Pit Wood the British had a howitzer, which had been brought up in September 1915, to fire in support of an attack on Hulluch.

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The British tunnellers had gained an advantage over the German miners by the Autumn of 1916, which virtually ended the German underground threat. The British turned to digging 12 subways about 25 ft (7.6 m) down, to the front line, the longest tunnel being 1,883 yd (1,722 m) long of the 10,500 yd (9,600 m) dug. In one sector, four Tunnelling companies of 500 men each, worked around-the-clock in 18-hour shifts for two months to dig 12 mi (20 km) of subways for foot traffic, tramways with rails for hand-drawn trolleys and a light railway system. Most tunnels were lit by electricity, accommodated telephone cables and some had trams and water supplies. Caverns were dug into the sides for brigade and battalion HQs, first aid posts and store-rooms. The subways were found to be a most efficient way to relieve troops in the line, form up for the attack and then to evacuate wounded. Some of the tunnels were continued into Russian saps with exits in mine craters in no man's land and new mines were laid. Galleries were dug to be opened after the attack for communication or cable trenches, the work being done by the 172nd, 176th, 182nd and 185th Tunnelling companies (Lieutenant-Colonel G. C. Williams, Controller of Mines First Army).

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Joffre set 14 August as the date when the First and Second armies were to invade Lorraine between Toul and Épinal, south of the German fortified area of Metz-Thionville. The First Army was to attack in the south with four corps, towards Sarrebourg 60 kilometres (37 mi) east of Nancy and Donon 25 kilometres (16 mi) south of Sarrebourg. Passes in the Vosges to the south of Donon were to be captured before the main advance began. The Second Army was to attack towards Morhange 45 kilometres (28 mi) north-east of Nancy, with two corps north of the First Army and three advancing successively behind the left flank of the corps to the south, to counter a German attack from Metz. The French offensive was complicated by the two armies diverging as they advanced, on difficult terrain particularly in the south, the combined fronts eventually being 150 kilometres (93 mi) wide. The advances of the First and Second armies were to attract German forces towards the south, while a French manoeuvre took place in Belgium and Luxembourg, to pierce a weak point in the German deployment and then destroy the main German armies.

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German resistance was fierce and when the offensive was called off on 17 May, few of the initial objectives had been met. The Australians were in possession of much of the German trench system between Bullecourt and Riencourt-lès-Cagnicourt but had been unable to capture Hendecourt. To the west, British troops managed to push the Germans out of Bullecourt but incurred considerable losses, failing also to advance north-east to Hendecourt. By the standards of the Western front, the gains of the first two days were nothing short of spectacular. A great deal of ground was gained for relatively few casualties and a number of strategically significant points were captured, notably Vimy Ridge. Additionally, the offensive succeeded in drawing German troops away from the French offensive in the Aisne sector. In many respects, the battle might be deemed a victory for the British and their allies but these gains were offset by high casualties and the ultimate failure of the French offensive at the Aisne. By the end of the offensive, the British had suffered more than 150,000 casualties and gained little ground since the first day. Despite significant early gains, they were unable to effect a breakthrough and the situation reverted to stalemate.

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Fresh troops from the unengaged brigades of the attacking divisions or from the reserve divisions would then pass through, to attack the Oosttaverne line at zero + 10:00 hours. As soon as the black line was captured, all guns were to bombard the Oosttaverne line, conduct counter-battery fire and place a standing barrage beyond the black line. All operational tanks were to join with the 24 held in reserve, to support the infantry advance to the Oosttaverne line.The Messines defences were on a forward slope, overlooked from Haubourdin Hill (Hill 63) south of the Douve valley and Kemmel Hill, 5,000 yards (4,600 m) west of Wijtschate, an arrangement which the experience of 1916 showed to be obsolete. A new line incorporating the revised principles of defence derived from the experience of the Battle of the Somme, known as Flandern I Stellung, was begun in February 1917. The first section began 6 miles (9.7 km) behind Messines Ridge, running north from the Lys to Linselles then Werviq and Beselare, where the nearest areas giving good artillery observation to the west were found. In April, Field Marshal Crown Prince Rupprecht and his chief of staff, Lieutenant-General Hermann von Kuhl, favoured withdrawal to the Warneton (third) line, before a British attack. The local divisional commanders objected, due to their belief that counter-mining had neutralised the British underground threat and the inadequacy of the Warneton line. The convex eastern slope limited artillery observation and the Ypres–Comines canal and the river Lys restricted the space below the ridge where infantry could manoeuvre for counter-attacks. British observation from the ridge would make the ground to the east untenable as far as Flandern I Stellung 6 miles (9.7 km) beyond.

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Total British losses from January to March 1917 in France were given as 67,217, French losses given were 108,000 and German losses were 65,381. The first attack of the Nivelle Offensive by the British First and Third armies came at Arras, north of the Hindenburg Line on 9 April and inflicted a substantial defeat on the German 6th Army, which occupied obsolete defences on forward slopes. Vimy Ridge was captured and further south, the greatest depth of advance since trench-warfare began was achieved, surpassing the success of the French Sixth Army on 1 July 1916. German reinforcements were able to stabilise the front line, using both of the defensive methods endorsed in the new German training manual and the British continued the offensive, despite the difficulties of ground and German defensive tactics, in support of the French offensives further south and then to keep German troops in the area while the Messines Ridge attack was being prepared. German casualties were c. 85,000, against British losses of 117,066 for the Third and First armies.

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The precedent of a German withdrawal to a prepared position followed by a counter-attack, which had occurred in 1914 was noted and that reserves freed by the retirement, would give the Germans an opportunity to attack the flanks of the withdrawal area. Nivelle had already decided to use the French troops released by the shorter front to reinforce the line in Champagne. British preparations for the attack at Arras were to proceed, with a watch kept for a possible German attack in Flanders and preparations for the attack on Messines Ridge were to continue. The pursuit of the German army was to be made in the Fourth Army area with advanced guards covered by the cavalry and cyclists attached to each corps and the 5th Cavalry Division. Larger forces were not to move east of a line from the Canal du Nord to the Somme south of Péronne until roads, bridges and railways had been repaired. The boundary of the Fourth Army and French Third Army was set from south of Nesle, through Offroy to St. Quentin.

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With its maze of underground tunnels, dugouts and concrete emplacements, Guillemont was a veritable fortress and an unquestionably tough nut to crack, as evidenced by the earlier failures of the British attacks during the previous two months. The 3 September attack finally saw Guillemont fall to the British. Other targets during the wider attack, such as High Wood and the Schwaben Redoubt, remained however firmly in German hands. On the banks of the Somme the French succeeded in taking both villages of Clery and Omiecourt.

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The attacks would confront the German 6th Army with a joint offensive, on a 70 mi (110 km) front, eastwards into the Douai plain, where an advance of 10–15 mi (16–24 km) would cut the railways supplying the German armies as far south as Reims. The French attacked Vimy Ridge and the British attacked further north in the Battle of Aubers Ridge (9 May) and the Battle of Festubert (15–25 May). The battle was fought during the German offensive of the Second Battle of Ypres (21 April – 25 May), which the Germans ended to reinforce the Artois front. The initial French attack broke through and captured Vimy Ridge but reserve units were not able to reinforce the troops on the ridge, before German counter-attacks forced them back about half-way to their jumping-off points. The British attack at Aubers Ridge was a costly failure and two German divisions in reserve were diverted south against the Tenth Army. The British offensive was suspended until 15 May, when the Battle of Festubert began and French attacks from 15 May to 15 June were concentrated on the flanks to create jumping-off points for a second general offensive, which began on 16 June. The British attacks at Festubert forced the Germans back 1.9 mi (3 km) and diverted reserves from the French but the Tenth Army gained little more ground, despite firing double the amount of artillery ammunition, at the cost of many casualties to both sides. On 18 June, the main offensive was stopped and local attacks were ended on 25 June. The French offensive had advanced the front line about 1.9 mi (3 km) towards Vimy Ridge, on an 5.0 mi (8 km) front. The failure to break through, despite the expenditure of 2,155,862 shells and the suffering of 102,500 casualties, led to recriminations against Joffre; the German 6th Army suffered 73,072 casualties. A lull followed until the Second Battle of Champagne, the Third Battle of Artois and the Battle of Loos in September. After the Marne campaign in 1914, French offensives in Artois, Champagne and at St Mihiel had been costly failures, leading to criticism of the leadership of General Joseph Joffre, within the army and the French government. The French President, Raymond Poincaré, arranged several meetings between Joffre and the Council of Ministers (Conseil des ministres) in March and April 1915, where reports of the failed operations were debated, particularly a condemnation of the April offensive against the St Mihiel salient. Joffre retained undivided command and freedom to conduct operations as he saw fit, which had been given at the beginning of the war but was instructed to consult with his subordinates; provisional army groups, which had been established in late 1914, were made permanent soon afterwards.

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In Britain, an Offensive sub-committee of the Committee of Imperial Defence was appointed on 5 August and established a principle that command of the seas was to be ensured and that objectives were considered only if they could be attained with local forces and if the objective assisted the priority of maintaining British sea communications, as British army garrisons abroad were returned to Europe in an "Imperial Concentration". Attacks on German coaling stations and wireless stations were considered to be important to clear the seas of German commerce raiders. Objectives at Tsingtau in the Far East and Luderitz Bay, Windhoek, Duala and Dar-es-Salaam in Africa and a German wireless station in Togoland, next to the British colony of Gold Coast in the Gulf of Guinea, were considered vulnerable to attack by local or allied forces.

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The Battle of Messines (7–14 June 1917) was an offensive conducted by the British Second Army, under the command of General Sir Herbert Plumer, on the Western Front near the village of Messines in West Flanders, Belgium, during the First World War. The Nivelle Offensive in April and May had failed to achieve its more ambitious aims, led to the demoralisation of French troops and the dislocation of the Anglo-French strategy for 1917. The offensive at Messines forced the Germans to move reserves to Flanders from the Arras and Aisne fronts, which relieved pressure on the French. The tactical objective of the attack at Messines was to capture the German defences on the ridge, which ran from Ploegsteert (Plugstreet) Wood in the south, through Messines and Wytschaete to Mt. Sorrel, to deprive the German 4th Army of the high ground south of Ypres. The ridge commanded the British defences and back areas further north, from which the British intended to conduct the "Northern Operation", to advance to Passchendaele Ridge, then capture the Belgian coast up to the Dutch frontier. The Second Army had five corps, of which three conducted the attack and two remained on the northern flank, not engaged in the main operation; the XIV Corps was available in General Headquarters reserve (GHQ reserve). The 4th Army divisions of Gruppe Wijtschate (Group Wytschaete) held the ridge, which were later reinforced by a division from Gruppe Ypern. The battle began with the detonation of a series of mines beneath German lines, which created 19 large craters and devastated the German front line defences. This was followed by a creeping barrage 700 yards (640 m) deep, covering the British troops as they secured the ridge, with support from tanks, cavalry patrols and aircraft.

The Battle of Vimy Ridge: A Look into the Tunnelling Operations of World War I

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