This German trench knife was taken during the Battle of the Somme by British Corporal Mark Lambert of the 16th Battalion West Yorkshire Regiment – the 1st Bradford Pals. Lambert engraved his initials and the word 'Somme' on the handle. Men could only keep what they could carry in their kit and often sold their battlefield trophies to officers able to send packages home or to soldiers behind the lines who had access to storage. Selling their trophies was also a way for soldiers to make extra money.