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Battle of Passchendaele Timeline
(31 July 1917 – 10 November 1917)The Battle of Passchendaele, also known as the Third Battle of Ypres, was a major World War I campaign fought on the Western Front near Ypres, Belgium, between July and November 1917. British and Allied forces under General Sir Douglas Haig sought to capture Passchendaele ridge and wear down German forces. The battle became infamous for its horrific conditions, with relentless rain turning the battlefield into a quagmire of deep mud, and for its staggering casualties. After months of grinding combat, Canadian troops finally captured the ruined village of Passchendaele in November 1917 at enormous human cost. More Less
Background and Strategy
Belgium recognised as sovereign and neutral state
1839
In the Treaty of London (1839), Belgium was recognised as a sovereign and neutral state after the secession of the southern provinces of the Netherlands in 1830, a status that would later shape British involvement in the region.
Image source: Battle of Passchendaele
First Battle of Ypres
1914
The German 4th Army had held the dominating ground on the southern face of the Ypres salient since the First Battle of Ypres in 1914, setting the strategic context for later offensives.
German invasion of Belgium
Aug 4, 1914
The German invasion of Belgium on 4 August 1914, in violation of Article VII of the Treaty of London, was the British casus belli against Germany and drew Britain into the First World War.
Second Battle of Ypres
Apr 22, 1915 - May 15, 1915
The Germans conducted their own Flanders offensive at the Second Battle of Ypres (22 April – 15 May 1915), making the Ypres salient more costly to defend.
Image source: Second Battle of Ypres
Minor operations in the Ypres salient
1916
Minor operations took place in the Ypres salient in 1916, some being German initiatives to distract the Allies from their preparations for the offensive at Verdun and later attempts to divert Allied resources from the Battle of the Somme.
Plumer begins planning offensives against Messines Ridge
Jan 1916
In January 1916, General Herbert Plumer began to plan offensives against Messines Ridge, Lille and Houthulst Forest. In early 1916, Haig also emphasised the importance of capturing the Gheluvelt plateau.
Image source: Herbert Plumer, 1st Viscount Plumer
Chantilly Conference agrees simultaneous attacks strategy
Nov 15, 1916 - Nov 16, 1916
At conferences in November 1916 and May 1917, the Entente decided a strategy that included the Flanders campaign. The commanders agreed on simultaneous attacks to overwhelm the Central Powers on the Western, Eastern and Italian fronts by the first fortnight of February 1917.
Image source: Chantilly Conferences
Joffre agrees to a Flanders campaign after spring offensive
Dec 8, 1916
A meeting in London of the Admiralty and the General Staff urged that the Flanders operation be undertaken in 1917 and Joffre replied on 8 December, agreeing to a Flanders campaign after the spring offensive.
Image source: Joseph Joffre
Kerensky Offensive conducted by Russian army
1917
The Russian army conducted the Kerensky Offensive in Galicia, to honour the agreement struck with the Allies at the Chantilly meeting of 15 to 16 November 1916.
Image source: Kerensky offensive
Germans resume unrestricted submarine warfare
Feb 1, 1917
British determination to clear the Belgian coast took on more urgency after the Germans resumed unrestricted submarine warfare on 1 February 1917.
Image source: U-boat campaign
Key Facts
- The Battle of Passchendeele is also known as the Third Battle of Ypres and lasted from 31 July to 10 November 1917.
- The battlefield was devastated by heavy rainfall, creating deep mud that drowned soldiers, horses, and made movement of artillery extremely difficult.
- British Commander-in-Chief General Sir Douglas Haig intended the offensive to break through German lines and reach the Belgian coast to destroy U-boat bases.
- Canadian Corps forces under General Arthur Currie captured the village of Passchendaele itself in November 1917, securing the objective at great cost.
- Total casualties exceeded 500,000 on both sides, making Passchendaele one of the bloodiest and most controversial battles of World War I.
Source
This Battle of Passchendaele timeline was generated with the help of AI, using information found on the internet.
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