At on July 1916 the Battle of the Somme started with explosion of 17 massive 'mines' underneath enemy territory. Lochnagar was the largest of these. It remains "The largest crater ever made by man 'in anger'".
Found on the back of a milestone on Shooters Hill, London. A milestone erected in the Century, to which a plate commemorating the the First World War battles of Ypres, and indicating the distance to Ypres has been attached.
World War I in Photos: Men wounded in the Ypres battle of September Walking along the Menin road, to be taken to the clearing station. German prisoners are seen assisting at stretcher bearing. Wilkins/State Library of Victoria)