The Battle of Cambrai

The Battle of Cambrai was a British Third Army offensive against the German Hindenburg Line west and south-west of Cambrai, an important German rail, road and supply centre in northern France. The operation opened on 20 November 1917 and continued through a German counter-offensive and British withdrawal in early December. Canadian official battle-honour nomenclature treats “Cambrai, 1917” as 20 November to 3 December, within the wider Cambrai Operations of 20 November to 7 December.

Cambrai is remembered as a turning point in the development of combined-arms warfare. Instead of a long preliminary bombardment, the British relied on surprise, predicted artillery fire, massed Mark IV tanks, infantry trained to move closely behind the tanks, aircraft, engineers, and cavalry held ready to exploit a breach. More than 400 tanks were committed in the wider operation, and the opening attack achieved a penetration of roughly four miles in several sectors.

For Indian and Canadian military history the battle is especially important, because the 5th Cavalry Division contained two cavalry brigades built around Indian Army regiments and the Canadian Cavalry Brigade. The division therefore placed Indian and Canadian mounted troops inside the same operational formation.

During the opening attack the Canadians attempted to exploit the breach around Masnières. During the German counter-offensive, Indian cavalry fought both mounted and dismounted, including hard fighting around Gauche Wood and Villers-Guislain.

As part of the 5th Cavalry Division, the Secunderabad and Ambala Brigades were to exploit the tank-and-infantry breach as soon as III Corps secured the Marcoing and Masnières crossings and opened the Masnières–Beaurevoir Line. Their operational mission was the Cavalry Corps mission: sweep east and north of Cambrai, isolate the town, block exits and communications, seize crossings over the River Sensée, and help cut off German troops still holding the Hindenburg Line west of Cambrai.

When the breakthrough stalled, the Indian mission changed from exploitation to emergency defence and counter-attack. On 30 November the Ambala Brigade was ordered to drive back German forces north of Épehy; 9th Hodson's Horse supported the leading 8th Hussars, and the 18th Lancers moved up as reserve, relief and reconnaissance troops near Gauche Wood.

On 1 December the 18th Lancers, fighting dismounted, were ordered to follow tanks into Gauche Wood and push toward its eastern side, while the Mhow Brigade of the 4th Cavalry Division — including 2nd Lancers (Gardner's Horse) and 38th Central India Horse — counter-attacked toward Gauche Wood and Villers-Guislain to stop the German counter-offensive.

The Canadian Cavalry Brigade shared the 5th Cavalry Division's opening exploitation mission. Once the infantry had forced the canal and rear defensive line, the brigade was to pass through the breach, sweep around Cambrai from the east and north, isolate the town and help secure the Sensée crossings.

Fort Garry Horse served as the brigade advance guard on the Masnières route. Its immediate task was to get through the canal crossing and into open country before German reserves could close the gap; one squadron succeeded in crossing and penetrating behind the German line.

After the cavalry breakthrough became impossible, the Canadian brigade's mission shifted to holding ground and defeating German counter-attacks. Canada's Department of National Defence records the brigade being placed in defensive positions from the second day onward.

Cambrai sat behind the Hindenburg Line and served as a major German communications hub. The battlefield was drier and less shell-destroyed than Passchendaele, which made it unusually suitable for tanks. The canal system, bridges, sunken roads, ridges and wooded high ground, however, created chokepoints that could stop exploitation even after the trench line had been pierced.

The 5th Cavalry Division was the key Indian–Canadian formation at Cambrai. Its order of battle included two brigades containing Indian Army cavalry regiments and one Canadian brigade. The Canadian Corps itself did not fight at Cambrai in 1917: the Canadian presence came primarily through this cavalry brigade serving inside a British cavalry division, plus the Royal Newfoundland Regiment in the assaulting infantry.

At 6:20 a.m. the British attack opened with a sudden artillery barrage. Because the guns had been registered by survey and calculation rather than by days of preliminary ranging fire, the Germans received far less warning than in earlier offensives. Tanks moved forward in concentrated groups, crushed wire, dropped fascines into trenches and enabled the infantry to penetrate the Hindenburg system.

The opening advance was one of the fastest British gains of the war to that point. Several divisions reached or exceeded their early objectives, but resistance at Flesquières and the canal crossings slowed the timetable. That delay was critical, because the cavalry needed open routes and daylight if it was to turn a tactical breach into an operational encirclement.

The Canadian Cavalry Brigade moved on the eastern route toward Masnières, with Fort Garry Horse as advance guard. The main bridge at Masnières was unusable after being damaged during the tank advance, so the regiment had to wait while a temporary route was found across the canal.

B Squadron eventually crossed and pushed beyond the infantry. Its mission was exceptionally ambitious: advance toward Escaudœuvres and strike German command infrastructure behind the front. The squadron soon met heavy machine-gun fire. Its commander, Captain D. Campbell, was killed and Lieutenant Harcus Strachan took command.

Strachan led the remaining cavalry through machine-gun posts and against a German field battery. The battery was overrun; German communications were cut several kilometres behind the line. With most horses killed or wounded and the larger cavalry exploitation cancelled, the survivors fought their way back after dark with prisoners. It was one of the deepest and most dramatic cavalry penetrations of the opening day.

The British could not widen the breach fast enough. German resistance around Fontaine-Notre-Dame and Bourlon Wood strengthened, while many tanks were destroyed, ditched or mechanically disabled. Infantry formations that had made the initial advance became exhausted, and reinforcements were insufficient for the scale of the original plan.

Cavalry intended for a sweeping mounted advance was increasingly used defensively or dismounted. That change is central to the Indian and Canadian experience of Cambrai: formations designed for mobility became emergency infantry as the battle reverted to close fighting around villages, ridges and woods.

The German Second Army struck back with a short, violent bombardment including gas and smoke, followed by infantry using infiltration methods that bypassed strongpoints and attacked command posts, artillery and communications. The southern British flank around Gonnelieu, Villers-Guislain and Gouzeaucourt was hit especially hard.

The cavalry divisions were rushed forward. The Ambala Brigade was ordered to drive the Germans back north of Épehy. The 8th Hussars led, 9th Hodson's Horse supported with the machine-gun squadron, and the 18th Lancers initially remained in reserve. By night the 8th Hussars and Hodson's Horse, already suffering heavy losses, were holding roughly 400 yards of a sunken road west of Gauche Wood; the 18th Lancers then moved up to relieve them and reconnoitre the wood.

On 1 December, Indian cavalry was heavily engaged in the struggle to stop the German counter-offensive. Tanks co-operated with dismounted Indian cavalry of the 5th Cavalry Division and with Guards troops in the attacks on Villers-Guislain and Gauche Wood. Gauche Wood was captured after severe fighting; smashed German machine guns and captured field guns were found in the position.

The 18th King George's Own Lancers fought dismounted around Gauche Wood. Their attack was to follow eight tanks after a 15-minute barrage from a Canadian horse-artillery battery. D Squadron first occupied an exposed crest, where roughly half of a 25-man party became casualties and three Hotchkiss guns were put out of action. When the tanks arrived, B Squadron advanced behind them, entered Gauche Wood, captured prisoners and found a complete German howitzer battery with ammunition. Indian cavalrymen then held the wood mixed with Grenadier Guards under prolonged shellfire.

Elsewhere, 2nd Lancers (Gardner's Horse) of the 4th Cavalry Division carried out one of the battle's most dramatic mounted actions. At about 9:35 a.m. they charged toward German positions around Gauche Wood and Villers-Guislain, followed by a squadron of the 6th Inniskilling Dragoons. The action achieved local results but cost the 2nd Lancers more than 100 casualties, including the commanding officer, Lieutenant-Colonel Turner.

Cambrai provides stronger evidence of direct Indian–Canadian cooperation than many earlier Western Front battles, because Indian and Canadian cavalry were integrated at divisional level.

The 5th Cavalry Division contained the Secunderabad Brigade and the Ambala Brigade, both built around major Indian Army regiments, alongside the Canadian Cavalry Brigade. They shared the same divisional commander, the same operational plan, the same routes of exploitation, and later the same defensive responsibilities.

The 18th Lancers' recorded comradeship with the Fort Garry Horse and the Royal Canadian Dragoons, including that exchange of commemorative silver, gives tangible evidence that Indian and Canadian soldiers did more than fight in the same campaign. They remembered themselves as battlefield comrades.

Casualty totals vary slightly with the date range used. The best museum-level estimate places total British Empire and Allied losses at about 44,000 killed, wounded or captured, against roughly 45,000 German casualties. Indian cavalry losses are inside the British total and must not be added to it again.

The opening attack was a genuine British tactical success. Surprise was achieved, sections of the Hindenburg Line were penetrated rapidly, thousands of German prisoners were taken, and the British advanced farther in a single day than during many previous offensives. Canadian cavalry briefly penetrated beyond the canal and demonstrated what exploitation might look like if a breach could be opened and kept open.

The broader operational objective was not achieved. The cavalry could not pass through in sufficient strength, Cambrai was not isolated or captured, and Bourlon Wood became a costly struggle. German reserves arrived faster than the British could exploit the breakthrough. On 30 November the German counter-offensive recovered substantial ground and forced the British to abandon exposed portions of the salient.

The final result is best described as a costly tactical experiment that produced an initial breakthrough but no decisive operational victory.

For the Indian cavalry, Cambrai was one of the most important Western Front battles of the war, because it demonstrated adaptability rather than obsolescence. Indian regiments were given genuine operational objectives: first to exploit the Hindenburg Line breakthrough and help isolate Cambrai, then to stop the German counter-offensive around Épehy, Gauche Wood and Villers-Guislain. They fought mounted when a tactical opening appeared, dismounted when the line had to be held, and in close cooperation with tanks, machine guns, horse artillery and British infantry.

Gobind Singh's Victoria Cross, the 2nd Lancers' costly charge, 9th Hodson's Horse holding the threatened line, and the 18th Lancers' entry into Gauche Wood all demonstrate significant Indian achievement. The broader cavalry encirclement was never completed, but during the counter-offensive phase Indian formations accomplished important local defensive and counter-attack objectives and helped prevent a deeper German exploitation.

Canada's main field army was not committed at Cambrai, but the Canadian Cavalry Brigade had a clearly defined role in the Cavalry Corps plan: pass through the Masnières sector, help isolate Cambrai, secure the Sensée crossings and disrupt German movement behind the Hindenburg Line. Fort Garry Horse came closest to realising that objective when B Squadron crossed at Masnières and penetrated beyond the supporting infantry before being isolated.

The battle also reinforced the distinctive role of Canadian mounted troops outside the Canadian Corps. Their service within the 5th Cavalry Division placed them directly beside Indian cavalry regiments and made Cambrai one of the clearest examples of Canadian and Indian formations serving under the same divisional command on the Western Front.

Cambrai was neither a simple British victory nor a simple German one. The British proved they could rupture the Hindenburg Line by surprise and combined arms; the Germans proved they could recover from the shock and launch a sophisticated counterstroke. The operation ended without the capture of Cambrai and with only a portion of the original British gains retained.

For the Indian and Canadian story, the battle has unusual significance. The heroism of Gobind Singh and Harcus Strachan captures the two sides of the cavalry experience: an Indian cavalryman repeatedly crossing open ground to preserve communications during a crisis, and a Canadian officer leading a mounted penetration deep into the enemy rear. Both actions occurred in a battle where the newest weapon of the war fought alongside one of its oldest arms.