I would like to copy this blunt summary of the Passchendaele offensive.
"On 26 October the Canadians set out for their ‘Road to Passiondale’ in the pouring rain. Five days later General Plumer gets even more troops at his disposal. Meanwhile the name of the village has acquired mythical proportions: ‘Passion-dale’, ‘the valley of suffering’.
On 6 November the Canadians manage to occupy the village, or what is left of it. They can make no further progress and on 10 November the offensive peters out on top of the ridge.
The result of Haig’s ‘Flanders Offensive’ is distressing: after 100 days the allies have advanced hardly eight kilometres.The human toll is enormous. 250,000 Allies killed, injured or missing, a quarter of the troops deployed. On the German side losses are just a bit lower."