The British and their Commonwealth allies have been plugging away at Ypres for months now. Now at last after several failed attempts a Canadian assault captures the village of Passchendaele. This heap of ruins is of no strategic importance but its capture allows Haig to claim that victory of a sort has been achieved. The Third Battle of Ypres now winds down, with the British generals finally accepting that conditions are too poor for further offensive action.
Both sides have suffered greatly in this battle. Exact numbers are unclear but both sides appear to have taken more than 200,000 casualties since the first British attacks at the end of July. It appears to be the case that in the latter stages of the fighting as many as one in four of the British dead died not from enemy gunfire but by drowning in mud.
images source (Wikipedia: Battle of Passchendaele)