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The Battle of Passchendaele, 1917: the Third Battle of Ypres

WWI · 1917 · British-led Allies vs Germany · ~7 min read · Updated October 2026

Next anniversary: 31 July 2027, the 110th anniversary On this day ›

Australian gunners walk a duckboard track through the shattered, flooded Chateau Wood near Ypres during the Third Battle of Ypres, 29 October 1917

Frank Hurley, 1917, via Wikimedia Commons, public domain (Crown copyright expired).

At a glance

British Empire and alliesDouglas Haig
vs
German EmpireCrown Prince Rupprecht, Friedrich Sixt von Arnim
Date
31 July to 10 November 1917
Location
Passchendaele, Belgium (Third Ypres)
Period
World War I
Outcome
Costly, limited Allied gains
Quick answer

The Third Battle of Ypres, known as Passchendaele, fought from July to November 1917, ended in costly and very limited Allied gains. A confident British-led plan to break the deadlock in Flanders bogged down in mud and slaughter, and the name became a byword for the futility of the First World War.

In the summer of 1917 the flat farmland of Flanders had already been fought over for three years, yet nothing had prepared the British-led armies for what waited in the Ypres Salient. What began as a confident plan to break the deadlock ended as a name that would come to mean mud, drowning, and slaughter without end. This is the story of the Third Battle of Ypres, remembered forever by the shattered village where the advance finally stopped, Passchendaele.1

Military map of the Ypres salient with front lines in red and army positions marked
The Third Battle of Ypres: the front on 31 July 1917 and the Allied advance to 7 December, with the Belgian, French, British and German forces around the salient. US Military Academy atlas map. Public domain (US government work). Department of History, US Military Academy, via Wikimedia Commons.

A Plan to Break the Deadlock

By mid-1917 the Western Front had barely moved in years, and the British commander Sir Douglas Haig believed Flanders offered a way out. The idea was to push north and east out of the Ypres Salient, that dangerous bulge in the line where German guns looked down on the Allies from every side, and then to break out toward the Belgian coast. There the Germans held ports that sheltered the U-boat flotillas then sinking Allied shipping at an alarming rate, so a breakthrough promised both a strategic prize and relief for a navy under strain. British, Australian, and New Zealand troops massed for the effort alongside a French army (the Canadians joined only for the final phase, in the autumn), and after a successful blow at Messines Ridge in June, the main offensive opened on 31 July. The ground itself, however, was already the enemy. Much of the low-lying Flanders plain sat only a little above sea level, drained by a fragile network of ditches that years of shelling had begun to wreck.2 › Zeebrugge Raid, 1918

Dark locator map with a gold star in a glowing circle marking the approximate center of the fighting of the Battle of Passchendaele, the coasts, rivers and lakes of the region, and a small world map inset with the area boxed
The Battle of Passchendaele: the star marks the approximate center of the fighting, and the inset shows the area on a world map. Drawn for this article from Natural Earth data, with no modern borders. Location map: © Echoes of Battle (data: Natural Earth, public domain)

The Bombardment and the Rain

Before the infantry advanced, the artillery spoke. More than 3,000 guns fired an estimated 4.25 million shells at the German positions in a colossal preliminary bombardment in the second half of July, churning the fields and smashing what remained of the drainage that had kept the land dry. Then, almost as the attack began, unusually heavy rains swept across Flanders. Water had nowhere to drain, and the pulverized earth dissolved into a bottomless sea of mud. Shell craters filled and merged into pools deep enough to swallow a man, and there are accounts of soldiers and horses drowning where they slipped from the narrow duckboard tracks. Wounded men who fell from the paths sometimes sank before help could reach them, and guns settled to their axles in the mire. The mud did not merely slow the offensive, it defined it, turning every yard into an ordeal.3

Six British soldiers carrying a wounded man on a stretcher through deep mud
Stretcher bearers struggle through mud up to their knees with a wounded man near Boesinghe on 1 August 1917, during the opening Battle of Pilckem Ridge. Photograph by John Warwick Brooke. Public domain
For a few miles of Flanders, the losses ran to the hundreds of thousands on each side, and Passchendaele became a byword for the horror of trench warfare.

Village by Village Toward Passchendaele

With no swift breakthrough possible, the battle became a grinding sequence of limited attacks, each aimed at a slight rise, a ruined farm, or the smashed remains of a hamlet. Through late summer and autumn the line inched forward across places whose names entered the record of the war, Pilckem Ridge, Menin Road, Polygon Wood, Broodseinde, and Poelcappelle. Progress was measured in a few thousand yards bought at fearful cost, as men attacked into machine-gun fire across ground where they could barely walk. The final objective was the ridge crowned by the village of Passchendaele, and it was Canadian troops, committed to the battle from 26 October, who fought the last bitter approaches and took the ruins of the village on 6 November 1917. By then Passchendaele was little more than a scatter of brick and splintered timber on a churned slope. A last Canadian attack on 10 November took more of the high ground on the ridge, though its northern end stayed in German hands, and after more than three months the offensive came to a close.4

The Meaning of a Name

For a gain of only a few miles of Flanders, the cost was staggering. Casualties are debated to this day, but the losses are widely put in the hundreds of thousands on each side, killed, wounded, and missing, many of the missing simply lost in the mud and never found. Commonly cited estimates put British and Empire losses at roughly 250,000 to more than 300,000, and German losses at roughly 220,000 to 260,000, though some estimates of German losses reach 400,000. In the years that followed, Passchendaele became a byword for the futility and horror of attritional trench warfare, a shorthand for battles that consumed lives on an enormous scale for slivers of ruined land. The very ground the Allies had struggled to hold was largely given up the following spring during the German offensives of 1918. Yet the endurance of the soldiers who fought there, wading forward under fire through a drowned landscape, remains one of the most haunting images of the First World War, and the name still stands as a warning about what such warfare could demand of ordinary men.5

The red poppies that bloomed on the churned ground of Flanders became the emblem of remembrance; read why the poppy is worn each November.

Two aerial photographs, an intact village with fields below and a cratered wasteland above
Official aerial photographs of the village of Passchendaele before (below) and after (above) the Third Battle of Ypres in 1917: streets and fields replaced by a sea of shell craters. Public domain

Frequently asked questions

What was the Battle of Passchendaele?

The Battle of Passchendaele in 1917 was the officially named Third Battle of Ypres, a British-led Allied offensive in the Ypres Salient in Flanders that aimed to break out toward the Belgian coast and ended in the mud around the ruined village of Passchendaele.

Why is the Battle of Passchendaele remembered for mud?

During the Battle of Passchendaele in 1917 a huge preliminary bombardment destroyed the land drainage and unusually heavy rains then flooded the low ground, turning the battlefield into a sea of mud where men and horses could drown in flooded shell craters.

Who captured Passchendaele in 1917?

Canadian troops, committed to the Battle of Passchendaele from 26 October, fought the final approaches and took the ruins of the village on 6 November 1917. A last Canadian attack on 10 November took more of the ridge and brought the long offensive to a close after more than three months of fighting.

How many casualties were there at the Battle of Passchendaele?

Figures for the Battle of Passchendaele in 1917 are still debated, but the losses ran to hundreds of thousands on each side, killed, wounded, and missing, for an advance of only a few miles of ground. Commonly cited estimates put British and Empire losses at roughly 250,000 to more than 300,000 and German losses at roughly 220,000 to 260,000, with some estimates as high as 400,000.

Who won the Battle of Passchendaele?

The Battle of Passchendaele in 1917, also called the Third Battle of Ypres, is remembered as an indecisive battle of attrition, since the British-led forces gained only a few miles of Flanders at a cost of hundreds of thousands of casualties on each side. Canadian troops finally took the ruined village on 6 November 1917, yet the ground was largely given up again during the German offensives of 1918.

Notes

A number in the text points to a note; each note names the works that paragraph draws on, listed in full under Sources.

  1. Encyclopaedia Britannica, “Battle of Passchendaele”. ↩
  2. National Army Museum, “Battle of Passchendaele”; Veterans Affairs Canada, “Battle of Passchendaele”. ↩
  3. National Army Museum, “Battle of Passchendaele”; Imperial War Museums, “Press Briefing”; Veterans Affairs Canada, “Battle of Passchendaele”; World History Encyclopedia, “Battle of Passchendaele”. ↩
  4. Robin Prior and Trevor Wilson, Passchendaele; Nick Lloyd, Passchendaele; Veterans Affairs Canada, “Battle of Passchendaele”; Imperial War Museums, “Press Briefing”; World History Encyclopedia, “Battle of Passchendaele”; National Army Museum, “Battle of Passchendaele”. ↩
  5. National Army Museum, “Battle of Passchendaele”; Imperial War Museums, “Press Briefing”; World History Encyclopedia, “Battle of Passchendaele”. ↩

Sources

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