The most controversial battle of the Great War was the third major battle of Ypres, better known as the Battle of Passchendaele. It took place between July and November, 1917.
The British and Empire forces advanced just five miles, at a cost of at least a quarter of a million casualties. Their one consolation was that the Germans had also suffered grievously.
Perhaps the battle's enduring epitaph is the phrase from one of Siegfried Sassoon's poems: I died in hell - They called it Passchendaele.
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