Lieutenant Colonel (Retd) Christopher Pugsley on "Engineers at War". Many of the most prominent man-made historical features in the landscape are the work of military engineers. Hadrian's Wall, Windsor Castle, the coastal fortifications, even the Albert Hall, all testify to the skills of the military engineer. Military engineers throughout history have always had to marry theory and genius to the practical skills of making the concept work in crisis on the ground; no small accomplishment.