The Lochnagar mine was an explosive-packed mine, located south of the village of La Boisselle, near Albert in the Somme département of France.
Albert was the main town behind the lines for the Allies nearest to the 1916 Somme battlefields. It lies on the main D929 road that runs east to Bapaume across the Somme battlefields, and west to Amiens in the other direction.
