Peter Doyle works with Richard Burt and others at Texas A & M University understanding the role that geology and terrain had to play in the storming of the Pointe du Hoc in Normandy on 6 June 1944; with the Battlefield Detectives team he has applied the same skills to understanding how terrain played an important role in impeding the progress of the German offensive during the 'Battle of the Bulge', and in defeating the British push along the narrow 'Devil's Highway' to relieve the beleagured Paratroopers at Arnhem in September 1944.