WWI. German soldiers belonging to the 26th Reserve Division and a collection of British prisoners-of-war, pause for a quick photograph. Definitely 1915 or later. The 26th Reserve Division spent World War I on the Western Front. It fought in the Battle of the Frontiers and then participated in the Race to the Sea, fighting in the Somme region. It occupied the line in the Somme/Artois region into 1916, facing the British offensive in the Battle of the Somme.