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Wikipedia: Battle of Cambrai
Battle of Cambrai
From Wikipedia, the free encyclopedia.

World War I

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Battle of Cambrai
ConflictWorld War I
DateNovember 20 - December 3, 1917
PlaceCambrai, France
ResultStalemate
Combatants
BritainGermany
Commanders
Gen. Julian ByngGen. von der Marwitz
Strength
2 corps1 corps
Casualties
45,000
9,000 prisoners
45,000
12,000 prisoners

The Battle of Cambrai (November 20 - December 3, 1917) was a British campaign of World War I. Noted for the first successful use of tanks, the British attack ended as another failure.

Cambrai is a French town in the Nord département (Nord-Pas-de-Calais). By 1917 it was a key supply point for the German Siegfried Stellung (also known as the Hindenburg Line) and the nearby Bourlon Ridge would be an excellent gain.

The Plan

An attack on Cambrai using tanks was proposed by J.F.C. Fuller in June 1917 and almost simultaneously by H. H. Tudor. Both plans were taken up by Julian Byng, Commander of the Third Army. Douglas Haig approved the plan as 'Operation GY' in September 1917, following another failure at Ypres. The Somme region was chosen for several reasons, one in particular for the tanks - the hope that the flatter, chalk terrain would be better for tanks than the stygian bog around Flanders.

The plan was quite complex, but basically the German line would be broken by a concentrated attack across a narrow front (around five miles) between the Canal de Nord and St Quentin canal and then Cambrai would be encircled and Boulon Ridge captured. Certain newly developed tactics would be employed, including the use of air interdiction and mixed infantry and tank formations. Cavalry was also included in the plan, expanding through a 'cavalry gap' towards the River Sensée. The assault was assigned to the 19 divisionss of the British Third Army; of these no fewer than fourteen were still recovering from the slaughter at Third Ypres. Their commander, Byng, was much more optimistic of the potential success than Haig. The defending force was part of the German Second Army under Georg von der Marwitz, designated Gruppe Caudry (or XIII Corps) it initially consisted of the 20th, 54th, 9th Reserve and 183rd divisions.

The divisions of the British III and IV Corps were to lead the attack. III Corps would attack in the south (right) between Crèvecoeur and Bonvais, with cavalry divisions waiting to exploit the bridgehead to be formed around Marcoing and Masnières. IV Corps was to advance in the north (left), capturing Havrincourt, Flesquières, Graincourt and Cantaing before allowing reserve and cavalry divisions to take Bourlon and the significant ridge. V Corp was assigned to follow up these successes to take the ground up to the River Sensée and secure crossings. The Tank Corps (soon to be renamed the Royal Tank Regiment) provided its entire strength, over 350 fighting tanks for the first day of the battle battle, 476 in all over the course of the battle. There were 216 tanks in the initial advance with 96 in reserve. Certain of the tanks were equipped with massive wood fascines to aid trench crossing or special 'grapnels' to aid wire removal. The first advances were mixed tank and infantry in 'Tank Battle Drill', with a leading tank echelon and then 50 yards back infantry platoons in two files, assigned as eight platoons per tank as either trench cleaners or trench 'stop'. Fourteen RFC squadrons were assigned to the battle.

The Battle

The battle began at 0620 on November 20. It opened with a carefully prepared predicted but unregistered fire barrage by 1,003 guns of key German defences followed by smoke and a creeping barrage at 300 yards ahead to cover the first advances. Despite efforts to preserve secrecy, the German forces had received sufficient intelligence to be on moderate alert, an attack on Havrincourt was anticipated as was the use of tanks.

Initially there was considerable success in most areas, and it seemed as if a great victory was within reach; the Hindenburg Line had been successfully penetrated with advances of up to 8 km achieved. On the right, the 12th (Eastern) Division advanced as far as Lateux Wood before digging in as ordered; the 20th (Light) Division forced a way through La Vacquerie and then advanced to capture a key bridge across the St Quentin canal at Masnieres. The fate of the bridge is unclear. It was certainly destroyed but that was either by German demolition or by the weight of tanks attempting to pass over it. Whatever the cause it halted the hoped for advance there. In the centre the British captured Ribécourt and Marcoing, but when the cavalry passed through, late, they were dealt a sharp blow and fell back from Noyelles.

In the centre the 51st (Highland) Division was stalled at its first objective, Flesquières, and left the advances around it exposed. It is believed that the commander of the 51st, G.M. Harper, substituted his own tank drill for the standard one and that an excessive space between the tanks and the infantry contributed to the failure. Flesquières was also one of the strongest points in the German line and was flanked by other strong points. Its defenders under Major Krebs also acquitted themselves well against the tanks, engaging them aggressively. Almost forty tanks were knocked out by the Flesquières artillery. Despite this the Germans were forced to abandon Flesquières during the night. On the left the 62nd (2nd West Riding) Division swept all the way through Havrincourt and Graincourt to within reach of the woods on Bourlon Ridge and the 36th (Ulster) Division on their left reached the Bapaume-Cambrai road. Of the tanks 180 were out of action after the first day, although only 65 had been destroyed. Of the remainder 71 had suffered mechanical failure and 43 had been 'ditched'. The British had suffered around 4,000 casualties and had taken 4,200 prisoners.

However the British had failed to reach the heights of Bourlon Ridge. The German command was quick to send up reinforcements overnight and was relieved that the British did not manage to fully exploit their early gains. When the battle was renewed on the 21st the pace of British advance was greatly slowed. The abandoned Flesquières and then Cantaing were captured in the very early morning but in general the British took to reinforcing their gains rather than expanding. The efforts of III Corps were officially halted and attention was turned to IV Corps.

The continuing effort was aimed at the ridge. Fighting was fierce around Bourlon and at Anneux, just before the woods, was very costly. German counters squeezed the British out of Moeuvres (21st) and Fontaine (22nd). Even when Anneux was taken the 62nd found themselves unable to even enter Bourlon Woods. The British were left exposed in a salient. Haig still wanted Bourlon Ridge and the exhausted 62nd Division was replaced by the 40th Division under John Ponsonby on the 23rd. Supported by almost a hundred tanks and 430 guns the 40th attacked into the woods of Bourlon Ridge on the morning of the 23rd. They made little progres. The Germans had put two divisions of Gruppe Arras on the ridge with another two in reserve, Gruppe Caudry was reinforced and to challenge the RFC the squadrons under the von Richthofen were assigned. The British 40th did reach the crest of the ridge but were held there and suffered over 4,000 casualties for their efforts in three days.

More British troops were pushed in to move beyond the woods to Fointaine. But the British reserves were rapidly depleted and the Germans were still sending in more reinforcements. The final British effort was on the 27th by the 62nd Division aided by thirty tanks. Early success was soon reversed by a German counterattack. The British now held a salient roughly 11 km by 9.5 km with its front along the crest of the ridge. On the 28th the offensive was officially ended and the British troops were ordered to lay wire and dig in. The Germans were quick to concentrate their artillery on the new British positions. On the 28th over 16,000 rounds were fired into the wood.

The Counter-attack

As the British used up their strength to take the ridge the Germans were reinforcing the area more generally. As early as the 23rd the German command felt that a British breakthrough would not occur and began to consider a counter-offensive. 20 divisions were arrayed in the Cambrai area. The Germans intended to retake the Borlon salient and also to attack around Havrincourt while diversionary attacks would hold IV Corps. Overall it was hoped to at least reach the old positions on the Hindenburg Line. The Germans intended to employ the new tactics of a short, intense period of shelling followed by a rapid assault using Hutier infiltration tactics, leading elements attacking in groups rather than waves and bypassing strong opposition. For the initial assault at Bourlon three divisions of Gruppe Arras under Otto von Moser were assigned.

The German attack began at 0700 on November 30. Almost immediately the majority of III Corps divisions were heavily engaged. Gruppe Caudry attacked from Bantouzelle to Rumilly and aimed for Marcoing. Gruppe Busogny was targeted from Banteux. The initial speed of the German infantries advance was completely unexpected by the British. The commands of 29th and 12th divisions were almost captured, with Brigadier-General Vincent having to fight free from his own encircled headquarters and then grab men from any retreating units to try and halt the Germans. In the south the German advance spread across eight miles and came within a few miles of the vital village of Metz and its link to Bourlon. At Bourlon itself the men under Moser met with stiffer resistance. The British had assigned eight divisions worth of fire support to the ridge and the Germans suffered heavy casualties. Despite this the Germans closed and there was fierce fighting. British units displayed reckless determination - one group of eight British machine guns fired over 70,000 rounds in their efforts to stem the German advance around Bourlon.

The concentration of British effort to hold the ridge was impressive but allowed the German advance elsewhere greater opportunities. Only the fortunate arrival of British tanks and the fall of night allowed some form of line to be held. By the following day the impetus of the German advance was lost, but continued pressure on December 3nd led to the German capture of La Vacquerie and the withdrawal of the British from the east of the St Quentin canal. The Germans had reached a line looping from the ridge at Quentin to near Marcoing. Their capture of Bonvais ridge made the British hold on Bourlon precarious.

Aftermath

On December 3 Haig ordered a retreat from the salient and by December 7 all the British gains were abandoned except for a portion of the Hindenburg line around Havrincourt, Ribécourt and Flesquières. The German had exchanged this territorial loss for a sweep of land to the south of Welsh ridge.

Total casualties for both sides were around 45,000 each with 11,000 Germans and 9,000 British taken prisoner. In terms of territory the Germans had recovered the early losses and a little more. Despite the outcome, the battle was seen as evidence than even the strongest trench defences could be overcome. The British had seen the advantage of tanks while the German command had seen the potential of new infantry tactics.

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