British troops near Boesinghe, 18 August 1917.

Soldiers watching distant shell-bursts on Pilckem Ridge during the Battle of Langemarck (16-18 August 1917). The latter engagement, part of the wider Passchendaele offensive, saw four days of fierce fighting which resulted in small gains for the British, but heavy casualties. From an album of 76 official photographs, 1916-1917. Photograph, World War One, Western Front (1914-1918), 1917.