The 51st (Highland) Division was a British Territorial Force division that fought on the Western Front in France during the First World War. The division's insignia was a stylised 'HD' inside a red circle. Early doubts about the division's performance earned it the nickname of "Harper's Duds" after the name of its commander Major General G.M. Harper. The division also fought during the Second World War. The division was nicknamed the "Highway Decorators" in reference to the 'HD' insignia that adorned road signs along their axis of advance.